Transcript
MICROSOFT
LEARNING
PRODUCT
6461A
Visual Studio® 2008: Windows®
Communication Foundation
Be sure to access the extended learning content on your
Course Companion CD enclosed on the back cover of the book.
MCT USE ONLY. STUDENT USE PROHIBITED
OFFICIAL
Visual Studio® 2008: Windows® Communication Foundation
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Product Number: 6461A
Released: 04/2008
MCT USE ONLY. STUDENT USE PROHIBITED
ii
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OFFICIAL MICROSOFT LEARNING PRODUCTS - TRAINER
EDITION – Pre-Release and Final Release Versions
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iii
Contents
Module 1: Getting Started with Windows Communication Foundation
Lesson 1: Designing an Application to be Part of a Service Oriented Architecture
(SOA)
1-3
Lesson 2: Overview of WCF Architecture
1-9
Lesson 3: Using a Language-Level Interface As a Service Contract
1-16
Lesson 4: Implementing a Simple WCF Service in Visual Studio 2008
1-22
Lesson 5: Consuming a simple WCF service in Visual Studio 2008
1-27
Lab: Creating a Simple Service
1-31
Module 2: Configuring and Hosting WCF Services
Lesson 1: Programmatically Configuring a Managed Application to Host a WCF
Service
2-3
Lesson 2: Programmatically Configuring a Managed Application to Call a WCF
Service
2-12
Lesson 3: Defining Client and Service Settings by Using File-Based
Configuration
2-17
Lesson 4: Selecting a Hosting Option for a WCF Service
2-21
Lesson 5: Deploying a WCF Service
2-30
Lab: Configure and Host a WCF Service
2-36
Module 3: Endpoints and Behaviors
Lesson 1: Exposing WCF Services over Different Endpoints
3-3
Lesson 2: Adding Behaviors to Services and Endpoints
3-14
Lesson 3: Interoperating with Non-WCF Web Services
3-20
Lab: Changing Service Endpoints and Behaviors
3-27
MCT USE ONLY. STUDENT USE PROHIBITED
Visual Studio® 2008: Windows® Communication Foundation
Visual Studio® 2008: Windows® Communication Foundation
Module 4: Debugging and Diagnostics
Lesson 1: Logging Messages
4-3
Lesson 2: Activity Tracing
4-12
Lab: Message Logging and Activity Tracing
4-17
Module 5: Designing and Defining Contracts
Lesson 1: Designing a Coherent and Cohesive WCF Service Interface
5-3
Lesson 2: Defining a Service Contract
5-10
Lesson 3: Defining Operations on a Service
5-16
Lesson 4: Defining a Data Contract
5-23
Lab: Contracts for Services and Data
5-30
Module 6: Handling Errors
Lesson 1: Relating .NET Exceptions to Service-level Faults
6-3
Lesson 2: Using Faults in a Service
6-8
Lesson 3: Handling Faults and Exceptions on Clients
6-17
Lab: Error Handling
6-24
Module 7: Improving WCF Service Quality
Lesson 1: Managing WCF Service Instances
7-3
Lesson 2: Managing Concurrency Issues
7-11
Lesson 3: Improving WCF Service Quality
7-17
Lesson 4: Improving Data Transfer Throughput
7-23
Lab: Improving WCF Service Quality
7-31
Module 8: Implementing WCF Security
Lesson 1: Overview of Security in WCF
8-3
Lesson 2: Applying Overall Security Requirements to a Binding
8-14
Lesson 3: Specifying Required Client and Service Credentials
8-25
Lesson 4: Working with Security Information
8-34
Lab: Protecting a Service
8-41
MCT USE ONLY. STUDENT USE PROHIBITED
iv
v
Module 9: Implementing Transactions
Lesson 1: Overview of Transactions in a Service-Oriented Application
9-3
Lesson 2: Creating Transactional Service Operations
9-10
Lesson 3: Enabling the Flow of Transactions from Client to Service
9-16
Lab: Implementing Transactions for a Service
9-22
Course Evaluation
9-34
Lab Answer Keys
Lab Answer Key 1: Getting Started with Windows Communication
Foundation
L1-1 -L1-22
Lab Answer Key 2: Configuring and Hosting WCF Services
L2-23 - L2-44
Lab Answer Key 3: Endpoints and Behaviors
L3-45 - L3-64
Lab Answer Key 4: Debugging and Diagnostics
L4-65 - L4-74
Lab Answer Key 5: Designing and Defining Contracts
L5-75 - L5-104
Lab Answer Key 6: Handling Errors
L6-105- L6-120
Lab Answer Key 7: Improving WCF Service Quality
L7-121 - L7-150
Lab Answer Key 8: Implementing WCF Security
L8-151 - L8-166
Lab Answer Key 9: Implementing Transactions
L9-167 - L9-192
MCT USE ONLY. STUDENT USE PROHIBITED
Visual Studio® 2008: Windows® Communication Foundation
L1-1
Module 1: Getting Started with Windows
Communication Foundation
Lab: Creating a Simple Service
Scenario
You are a developer on the Contoso Clinic Management product team. You are
starting development and you have been assigned to the appointments service in
this initial phase.
Logon Information:
•
Virtual Machine: 6461A-LON-DEV-01
•
User Name: Student
•
Password: Pa$$w0rd
Estimated time: 40 minutes
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Creating a Simple Service
Module 1: Getting Started with Windows Communication Foundation
Exercise 1: Creating a Simple WCF Service
In this exercise, you will develop the WCF service by using the WCF Service
Library template in Microsoft® Visual Studio® 2008. You will then define a service
contract, implement the service contract, and configure the service's endpoints.
Finally, you will host the service in Internet Information Service (IIS).
The main tasks for this exercise are as follows:
1.
Start the 6461-LON-DEV-01 virtual machine and log on as Student.
2.
Add a new WCF Service Library project to the existing ConnectedWCF
solution.
3.
Add the existing AppointmentHelperClass to the solution.
4.
Define the service contract.
5.
Implement the service contract.
6.
Add a WCF Service Application project to the ConnectedWCF solution.
7.
Configure the endpoints for the service.
8.
Test the AppointmentService.
f Task 1: Start the 6461-LON-DEV-01 virtual machine and log on as
Student.
1.
Open the Virtual Server Remote Control Client and double-click 6461-LONDEV-01.
2.
Log on to 6461-LON-DEV-01 as Student using the password Pa$$w0rd.
f Task 2: Add a new WCF Service Library project to the existing
ConnectedWCF solution.
1.
On the Start menu, point to All Programs, point to Microsoft Visual Studio
2008, and then click Microsoft Visual Studio 2008.
2.
In Visual Studio 2008, on the File menu, point to Open, and then click
Project/Solution.
MCT USE ONLY. STUDENT USE PROHIBITED
L1-2
3.
L1-3
In the Open Project dialog box, browse to either of the following:
•
If you are using Visual Basic, browse to the
E:\Labfiles\Starter\VB\ConnectedWCF folder, and then double-click the
ConnectedWCF.sln file.
•
If you are using Visual C#, browse to the
E:\Labfiles\Starter\CS\ConnectedWCF folder, and then double-click the
ConnectedWCF.sln file.
4.
On the File menu, point to Add, and then click New Project.
5.
In the Add New Project dialog box, define a project with the following
properties, and then click OK:
•
Project types: If you are using Visual Basic, expand Visual Basic, and then
click WCF. If you are using Visual C#, expand Visual C#, and then click
WCF.
•
Templates: Click the WCF Service Library project template.
•
Name: In the Name box, type AppointmentService
•
Location: If you are using Visual Basic, in the Location box, type
E:\Labfiles\Starter\VB\ConnectedWCF If you are using Visual C#, in
the Location box, type E:\Labfiles\Starter\CS\ConnectedWCF
6.
In Solution Explorer, right-click the AppointmentService project, and then
click Properties.
7.
In the Properties window, on the Application tab, in the Root namespace box
(for Visual Basic) or Default namespace box for Visual C#), type
com.contoso.AppointmentService
8.
On the File menu, click Save All.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Creating a Simple Service
Module 1: Getting Started with Windows Communication Foundation
f Task 3: Add the existing AppointmentHelperClass to the solution.
1.
In Solution Explorer, right-click the AppointmentService project, click Add,
and then click Existing Item.
2.
In the Add Existing Item - AppointmentService dialog box, browse to the
following file:
3.
•
If you are using Visual Basic, browse to the E:\Labfiles\Starter\VB\
folder, and then double-click the AppointmentHelperClass.vb file.
•
If you are using Visual C#, browse to the E:\Labfiles\Starter\CS\ folder,
and then double-click the AppointmentHelperClass.cs file.
In Solution Explorer, right-click AppointmentHelperClass, and then click
View Code.
f Task 4: Define the service contract.
1.
In Solution Explorer, right-click IService1, click Rename, type
AppointmentServiceContract.vb (for Visual Basic) or
AppointmentServiceContract.cs (for Visual C#), and then press ENTER.
2.
If you are using Visual Basic, in the Microsoft Visual Studio dialog box, click
Yes.
3.
In Solution Explorer, right-click AppointmentServiceContract, and then click
View Code.
4.
If you are using Visual C#, change the namespace to
com.contoso.AppointmentService.
[Visual C#]
...
namespace com.contoso.AppointmentService
{
...
}
MCT USE ONLY. STUDENT USE PROHIBITED
L1-4
5.
L1-5
If you are using Visual C#, change the interface name to
AppointmentServiceContract.
[Visual C#]
...
public interface AppointmentServiceContract
{
}
...
6.
7.
In the Code Editor window for the AppointmentServiceContract class file,
remove the following:
•
All comments
•
The CompositeType class definition
•
The GetData and GetDataUsingDataContract methods in the
AppointmentServiceContract interface definition
Modify the ServiceContract attribute on the AppointmentServiceContract
definition to include the namespace
http://contoso.com/services/AppointmentService.
[Visual Basic]
...
_
...
[Visual C#]
...
[ServiceContract(Namespace =
"http://contoso.com/services/AppointmentService")]
...
8.
Within the AppointmentServiceContract definition, define a method named
CreateAppointment that returns a string and that accepts a string parameter
named patientId, a string parameter named doctorId, and a DateTime
parameter named start.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Creating a Simple Service
Module 1: Getting Started with Windows Communication Foundation
9.
Add the OperationContract attribute to the CreateAppointment method.
[Visual Basic
...
_
Function CreateAppointment(ByVal patientId As String, _
ByVal doctorId As String, ByVal start As DateTime) As String
...
[Visual C#]
...
[OperationContract]
string CreateAppointment(string patientId, string doctorId,
DateTime start);
...
10. Define a second method named CancelAppointment that returns a bool value
and that accepts a string parameter named appointmentId.
11. Add the OperationContract attribute to the CancelAppointment method.
[Visual Basic
...
_
Function CancelAppointment(ByVal appointmentId As String) _
As Boolean
...
[Visual C#]
...
[OperationContract]
bool CancelAppointment(string appointmentId);
...
12. Define a third method named ListAvailableAppointmentTimes that returns a
generic List of type DataTime and accepts a string parameter named doctorId
and a DataTime parameter named day.
MCT USE ONLY. STUDENT USE PROHIBITED
L1-6
L1-7
13. Add the OperationContract attribute to the ListAvailableAppointmentTimes
method.
[Visual Basic
...
_
Function ListAvailableAppointmentTimes(ByVal doctorId As String, _
ByVal day As DateTime) As List(Of DateTime)
...
[Visual C#]
...
[OperationContract]
List ListAvailableAppointmentTimes(string doctorId,
DateTime day);
...
Your code for the AppointmentServiceContract class should resemble the
following.
[Visual Basic]
_
Public Interface AppointmentServiceContract
_
Function CreateAppointment(ByVal patientId As String, _
ByVal doctorId As String, ByVal start As DateTime) As String
_
Function CancelAppointment(ByVal appointmentId As String) _
As Boolean
_
Function ListAvailableAppointmentTimes(ByVal doctorId As String,
_
ByVal day As DateTime) As List(Of DateTime)
End Interface
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Creating a Simple Service
Module 1: Getting Started with Windows Communication Foundation
[Visual C#]
...
namespace com.contoso.AppointmentService
{
[ServiceContract(Namespace =
"http://contoso.com/services/AppointmentService")]
public interface AppointmentServiceContract
{
[OperationContract]
string CreateAppointment(string patientId, string doctorId,
DateTime start);
[OperationContract]
bool CancelAppointment(string appointmentId);
[OperationContract]
List ListAvailableAppointmentTimes(string doctorId,
DateTime day);
}
}
f Task 5: Implement the service contract.
1.
In Solution Explorer, right-click Service1, click Rename, type
AppointmentServiceImplementation.vb (for Visual Basic) or
AppointmentServiceImplementation.cs (for Visual C#), and then press
ENTER.
2.
If you are using Visual Basic, in the Microsoft Visual Studio dialog box, click
Yes.
3.
In Solution Explorer, right-click AppointmentServiceImplementation, and
then click View Code.
4.
If you are using Visual C#, change the namespace to
com.contoso.AppointmentService.
5
If you are using Visual C#, rename the Service1 class definition to
AppointmentServiceImplementation.
6.
Remove the following from the AppointmentServiceImplementation class:
•
All comments
•
The GetData and GetDataUsingDataContract methods
MCT USE ONLY. STUDENT USE PROHIBITED
L1-8
L1-9
7.
Implement the AppointmentServiceContract interface. If you are using Visual
Basic, press ENTER after you type the interface name to generate the method
stubs. If you are using Visual C#, right-click the text
AppointmentServiceContract in the class definition, point to Implement
Interface, and then click Implement Interface.
8.
If you are using Visual C#, remove the following code from the
CreateAppointment, CancelAppointment and
ListAvailableAppointmentTimes methods.
[Visual C#]
...
throw new NotImplementedException();
...
9.
In the CreateAppointment method, add code to do the following:
•
Create an Appointment object named newAppointment, and then pass
the variables patientId, doctorId, and start as parameters to the
constructor.
•
Return the result of the static GenerateNewAppointment method in the
AppointmentHelperClass class. Pass the newAppointment object as a
parameter.
[Visual Basic]
...
Public Function CreateAppointment(ByVal patientId As String, _
ByVal doctorId As String, ByVal start As Date) _
As String Implements
AppointmentServiceContract.CreateAppointment
Dim newAppointment As New Appointment(patientId, doctorId, _
start)
Return AppointmentHelperClass. _
GenerateNewAppointment(newAppointment)
End Function
...
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Creating a Simple Service
Module 1: Getting Started with Windows Communication Foundation
[Visual C#]
...
public string CreateAppointment(string patientId, string doctorId,
DateTime start)
{
Appointment newAppointment = new Appointment(patientId,
doctorId,
start);
return AppointmentHelperClass.GenerateNewAppointment(
newAppointment);
}
...
10. In the CancelAppointment method, add code to return the result of the static
CancelExistingAppointment method in the AppointmentHelperClass class.
Pass the appointmentId variable as a parameter.
[Visual Basic]
...
Public Function CancelAppointment(ByVal appointmentId As String) _
As Boolean Implements
AppointmentServiceContract.CancelAppointment
Return AppointmentHelperClass.CancelExistingAppointment( _
appointmentId)
End Function
...
[Visual C#]
...
public bool CancelAppointment(string appointmentId)
{
return AppointmentHelperClass.CancelExistingAppointment(
appointmentId);
}
...
MCT USE ONLY. STUDENT USE PROHIBITED
L1-10
L1-11
11. In the ListAvailableAppointmentTimes method, add code to return the result
of the static GetAvailableAppointments method in the
AppointmentHelperClass class. Pass the doctorId and day variables as
parameters.
[Visual Basic]
...
Public Function ListAvailableAppointmentTimes(ByVal doctorId _
As String, ByVal day As Date) As System.Collections. _
Generic.List(Of Date) Implements _
AppointmentServiceContract.ListAvailableAppointmentTimes
Return AppointmentHelperClass.GetAvailableAppointments(doctorId,
_
day)
End Function
...
[Visual C#]
...
public List ListAvailableAppointmentTimes(string
doctorId,
DateTime day)
{
return AppointmentHelperClass.GetAvailableAppointments(doctorId,
day);
}
...
12. In Solution Explorer, right-click the AppointmentService project, and then
click Build.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Creating a Simple Service
Module 1: Getting Started with Windows Communication Foundation
Your code for the AppointmentServiceImplementation class should resemble
the following.
[Visual Basic]
...
Public Class AppointmentServiceImplementation
Implements AppointmentServiceContract
Public Function CreateAppointment(ByVal patientId As String, _
ByVal doctorId As String, ByVal start As Date) _
As String Implements _
AppointmentServiceContract.CreateAppointment
Dim newAppointment As New Appointment(patientId, doctorId, _
start)
Return AppointmentHelperClass. _
GenerateNewAppointment(newAppointment)
End Function
Public Function CancelAppointment(ByVal appointmentId As String)
_
As Boolean Implements _
AppointmentServiceContract.CancelAppointment
Return AppointmentHelperClass.CancelExistingAppointment( _
appointmentId)
End Function
Public Function ListAvailableAppointmentTimes(ByVal doctorId _
As String, ByVal day As Date) As System.Collections. _
Generic.List(Of Date) Implements _
AppointmentServiceContract.ListAvailableAppointmentTimes
Return AppointmentHelperClass.GetAvailableAppointments( _
doctorId, day)
End Function
End Class
...
MCT USE ONLY. STUDENT USE PROHIBITED
L1-12
[Visual C#]
...
namespace com.contoso.AppointmentService
{
public class AppointmentServiceImplementation :
AppointmentServiceContract
{
#region AppointmentServiceContract Members
public string CreateAppointment(string patientId, string
doctorId,
DateTime start)
{
Appointment newAppointment = new Appointment(patientId,
doctorId,
start);
return AppointmentHelperClass.GenerateNewAppointment(
newAppointment);
}
public bool CancelAppointment(string appointmentId)
{
return AppointmentHelperClass.CancelExistingAppointment(
appointmentId);
}
public List ListAvailableAppointmentTimes(
string doctorId, DateTime day)
{
return
AppointmentHelperClass.GetAvailableAppointments(doctorId,
day);
}
#endregion
}
...
L1-13
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Creating a Simple Service
Module 1: Getting Started with Windows Communication Foundation
f Task 6: Add a WCF Service Application project to the ConnectedWCF
solution.
1.
On the File menu, point to Add, and then click New Project.
2.
In the Add New Project dialog box, define a project with the following
properties, and then click OK:
•
Project types: If you are using Visual Basic, expand Visual Basic, and then
click Web. If you are using Visual C#, expand Visual C#, and then click
Web.
•
Templates: Click the WCF Service Application project template.
•
Name: In the Name box, type AppointmentServiceIISHost
•
Location: If you are using Visual Basic, in the Location box, type
E:\Labfiles\Starter\VB\ConnectedWCF If you are using Visual C#, in
the Location box, type E:\Labfiles\Starter\CS\ConnectedWCF
3.
In Solution Explorer, right-click the AppointmentServiceIISHost project, and
then click Properties.
4.
In the Properties window, on the Web tab, in the Servers section, click
Specific port, and then in the corresponding box, type 8001
5.
On the File menu, click Save All.
6.
If you are using Visual Basic, in Solution Explorer, click Show All Files.
7.
Remove the following files and folders from the AppointmentServiceIISHost
project:
•
The IService1 class file
•
The Service1.svc.vb (for Visual Basic) or Service.svc.cs (for Visual C#)
•
The App_Data folder
8.
In Solution Explorer, right-click the AppointmentServiceIISHost project, and
then click Add Reference.
9.
In the Add Reference dialog box, on the Projects tab, double-click
AppointmentService.
10. In Solution Explorer, within the AppointmentServiceIISHost project, rightclick the Service1.svc file, click Rename, type AppointmentService.svc and
then press ENTER.
MCT USE ONLY. STUDENT USE PROHIBITED
L1-14
L1-15
11. In Solution Explorer, right-click AppointmentService.svc, and then click View
Markup.
12. In the Code Editor window, make the following changes to the ServiceHost
element in the AppointmentService.svc file:
•
Change the Service attribute value to
com.contoso.AppointmentService.AppointmentServiceImplementation.
•
Remove the CodeBehind attribute and value.
[Visual Basic]
<%@ ServiceHost Language="vb" Debug="true"
Service="com.contoso.AppointmentService.AppointmentServiceImplement
ation" %>
[Visual C#]
<%@ ServiceHost Language="c#" Debug="true"
Service="com.contoso.AppointmentService.AppointmentServiceImplement
ation" %>
13. On the File menu, click Save All.
14. In Solution Explorer, right-click the AppointmentServiceIISHost project, and
then click Build.
f Task 7: Configure the endpoints for the AppointmentServiceIISHost.
1.
In Solution Explorer, within the AppointmentServiceIISHost project, rightclick Web.config, and then click Edit WCF Configuration.
2.
In the WCF Service Configuration Editor window, in the Configuration pane,
expand Advanced, expand ServiceBehaviors, and then click
AppointmentServiceIISHost.Service1Behavior.
3.
In the right pane, in the General section, in the Name box, type
AppointmentServiceIISHost.ServiceBehavior
4.
In the left pane under Services, click AppointmentServiceIISHost.Service1.
5.
In the right pane, in the Name box, type
com.contoso.AppointmentService.AppointmentServiceImplementation and
then press ENTER.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Creating a Simple Service
Module 1: Getting Started with Windows Communication Foundation
6.
In the left pane under Services, expand
com.contoso.AppointmentService.AppointmentServiceImplementation,
expand Endpoints, and then click the first {EmptyName] node.
7
In the right-pane, in the Contract box, type
com.contoso.AppointmentService.AppointmentServiceContract
8.
In the Microsoft Service Configuration Editor window, on the File menu, click
Save.
9.
Close the Microsoft Service Configuration Editor window.
f Task 8: Test the AppointmentService.
1.
In Solution Explorer, right-click the AppointmentServiceIISHost project,
point to Debug, and then click Start new instance.
2.
In the Debugging Not Enabled dialog box, click OK.
3.
In the Script Debugging Disabled dialog box, click Yes.
4.
In the Information Bar dialog box, click Close.
5.
In Internet Explorer, on the Directory Listing page, click
AppointmentService.svc.
6.
If you have successfully configured and hosted the AppointmentService,
Internet Explorer will display the AppointmentServiceImplementation
service default page.
7.
Close Internet Explorer.
Results: After this exercise, you should have developed a WCF service in Visual
Studio 2008.
MCT USE ONLY. STUDENT USE PROHIBITED
L1-16
L1-17
Exercise 2: Calling the Simple WCF Service
In this exercise, you will add code to the existing ClinicAdminClient Windows
Forms application to enable users to find all the available appointment timeslots,
create a new appointment, and delete an existing appointment.
The main tasks for this exercise are as follows:
1.
Add a reference to the AppointmentService.
2.
Add code to the ClinicAdminClient class.
3.
Build and run the solution.
f Task 1: Add a reference to the AppointmentService.
1.
In Solution Explorer, right-click the ClinicAdminClient project, and then click
Add Service Reference.
2.
In the Add Service Reference dialog box, define a service reference with the
following information, and then click OK.
a.
Address: In the Address box, type
http://localhost:8001/AppointmentService.svc and then click Go.
b.
Namespace: In the Namespace box, type AppointmentServiceReference
f Task 2: Add code to the ClinicAdminClient class.
1.
In Solution Explorer, right-click ClinicAdminForm, and then click View Code.
2.
Locate the TODO 1 comment, and bring the
ClinicAdminClient.AppointmentServiceReference into scope.
[Visual Basic]
...
'TODO 1.
Imports ClinicAdminClient.AppointmentServiceReference
...
[Visual C#]
...
//TODO 1.
using ClinicAdminClient.AppointmentServiceReference;
...
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Creating a Simple Service
Module 1: Getting Started with Windows Communication Foundation
3.
Locate the TODO 2 comment, and then add code to return a new
AppointmentServiceContractClient object.
[Visual Basic]
...
Private Function GetAppointmentServiceProxy() As _
AppointmentServiceContract
' TODO 2.
Return New AppointmentServiceContractClient()
End Function
...
[Visual C#]
...
private AppointmentServiceContract GetAppointmentServiceProxy()
{
// TODO 2.
return new AppointmentServiceContractClient();
}
...
4.
Locate the TODO 3 comment, and then add code to do the following:
•
Create a new AppointmentServiceContract object called proxy, and then
initialize it to the return value of the GetAppointmentServiceProxy
method.
•
Set the slots object to the return value of the
ListAvailableAppointmentTimes method in the proxy class. Pass the
Text property of the doctorId field and the Value property of the
dateRequested field as parameters.
[Visual Basic]
...
' TODO 3.
Dim proxy As AppointmentServiceContract = _
GetAppointmentServiceProxy()
slots = proxy.ListAvailableAppointmentTimes(doctorId.Text, _
dateRequested.Value)
...
MCT USE ONLY. STUDENT USE PROHIBITED
L1-18
L1-19
[Visual C#]
...
// TODO 3.
AppointmentServiceContract proxy = GetAppointmentServiceProxy();
slots = proxy.ListAvailableAppointmentTimes(doctorId.Text,
dateRequested.Value);
...
5.
Locate the TODO 4 comment, and then add code to do the following:
•
Create a new AppointmentServiceContract object named proxy, and
then initialize it to the return value of the GetAppointmentServiceProxy
method.
•
Set the appointmentId variable to the return value of the
CreateAppointment method in the proxy class. Pass the Text property of
the patientId field, the Text property of the doctorId field, and the slot
variable as parameters.
[Visual Basic]
...
' TODO 4.
Dim proxy As AppointmentServiceContract _
= GetAppointmentServiceProxy()
appointmentId = _
proxy.CreateAppointment(patientId.Text, doctorId.Text, slot)
...
[Visual C#]
...
// TODO 4.
AppointmentServiceContract proxy = GetAppointmentServiceProxy();
appointmentId = proxy.CreateAppointment(patientId.Text,
doctorId.Text, slot);
...
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Creating a Simple Service
Module 1: Getting Started with Windows Communication Foundation
6.
Locate the TODO 5 comment, and then add code to do the following:
•
Create a new AppointmentServiceContract object named proxy, and
then initialize it to the return value of the GetAppointmentServiceProxy
method.
•
Set the cancelled variable to the return value of the CancelAppointment
method in the proxy class. Pass the Text property of the appointmentId
field as a parameter.
[Visual Basic]
...
' TODO 5.
Dim proxy As AppointmentServiceContract _
= GetAppointmentServiceProxy()
cancelled = proxy.CancelAppointment(appointmentId.Text)
...
[Visual C#]
...
// TODO 5.
AppointmentServiceContract proxy = GetAppointmentServiceProxy();
cancelled = proxy.CancelAppointment(appointmentId.Text);
...
MCT USE ONLY. STUDENT USE PROHIBITED
L1-20
L1-21
f Task 3: Build and run the solution.
1.
On the Build menu, click Build Solution.
2.
On the Debug menu, click Start Debugging.
3.
On the Clinic Administration Client form, on the Create Appointment tab,
click Find Slots.
4.
Create an appointment with the following information, and then click Create:
•
Doctor: In Doctor list, click ENT_Davies.
•
Slots: In the Slots list, click any of the available time slots.
•
Patient: In the Patient box, type your name.
5.
In the Appointment Created dialog box, make a note of the Appointment
identifier, and then click OK.
6.
On the Cancel Appointment tab, in the Appt ID box, type your Appointment
identifier, and then click Delete.
7.
In the Appointment Cancellation dialog box, click OK.
8.
In Visual Studio 2008, on the Debug menu, click Stop Debugging.
9.
Close Visual Studio 2008.
Results: After this exercise, you should have enhanced the existing
ClinicAdminClient application to invoke the methods in the AppointmentService.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Creating a Simple Service
L2-23
Module 2: Configuring and Hosting WCF
Services
Lab: Configure and Host a WCF
Service
Scenario
You are a developer on the Contoso Clinic Management product team. Your team
has developed part of the appointment service and your task now is to look at the
different ways of storing the WCF configurations settings and hosting the
appointments service.
Logon Information:
•
Virtual Machine: 6461A-LON-DEV-02
•
User Name: Student
•
Password: Pa$$w0rd
Estimated time: 80 minutes
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Configure and Host a WCF Service
Module 2: Configuring and Hosting WCF Services
Exercise 1: Creating a Programmatically Configured
Managed Application to Host a Service
In this exercise, you will develop an EXE application to host the appointment
service.
The main tasks for this exercise are as follows:
1.
Start the 6461-LON-DEV-02 virtual machine and log on as Student.
2.
Open the existing ConnectedWCF solution.
3.
Add a new Windows Console application to the ConnectedWCF solution.
4.
Add code to host the AppointmentService.
5.
Change the endpoint address in the ClinicAdminClient.
6.
Set the ConnectedWCF solution startup projects.
7.
Build and run the solution.
f Task 1: Start the 6461-LON-DEV-02 virtual machine and log on as
Student
1.
Open the Virtual Server Remote Control Client, and then double-click 6461LON-DEV-02.
2.
Log on to 6461-LON-DEV-02 as Student using the password Pa$$w0rd.
f Task 2: Open the existing ConnectedWCF solution
1.
On the Start menu, point to All Programs, point to Microsoft Visual Studio
2008, right-click Microsoft Visual Studio 2008, and then click Run as
administrator
2.
In the User Account Control dialog box, click Continue.
3.
In Microsoft® Visual Studio® 2008 development system, on the File menu,
point to Open, and then click Project/Solution.
MCT USE ONLY. STUDENT USE PROHIBITED
L2-24
4.
L2-25
In the Open Project dialog box, go to either of the following:
•
If you are using Microsoft Visual Basic® development system, go to the
E:\Labfiles\Starter\VB\Ex1\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
•
If you are using Microsoft Visual C#® development tool, go to the
E:\Labfiles\Starter\CS\Ex1\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
f Task 3: Add a new Windows Console application to the
ConnectedWCF solution
1.
On the File menu, point to Add, and then click New Project.
2.
In the Add New Project dialog box, define a project with the following
properties, and then click OK.
•
Project types: If you are using Visual Basic, expand Visual Basic, and then
click Windows. If you are using Visual C#, expand Visual C#, and then
click Windows.
•
Templates: Click the ConsoleApplication project template.
•
Name: In the Name box type AppointmentServiceSelfHost.
•
Location: If you are using Visual Basic, in the Location box, type
E:\Labfiles\Starter\VB\Ex1\ConnectedWCF
If you are using Visual C#, in the Location box, type
E:\Labfiles\Starter\CS\Ex1\ConnectedWCF
f Task 4: Add code to host the AppointmentService
1.
In Solution Explorer, right-click the AppointmentServiceSelfHost project, and
then click Add Reference.
2.
In the Add Reference dialog box, on the .NET tab, in the Component Name
column, double-click the System.ServiceModel assembly.
3.
In Solution Explorer, right-click the AppointmentServiceSelfHost project, and
then click Add Reference.
4.
In the Add Reference dialog box, on the Projects tab, in the Project Name
column, double-click the AppointmentService assembly.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Configure and Host a WCF Service
Module 2: Configuring and Hosting WCF Services
5.
In the Code Editor window for the Module1 class (for Visual Basic) or
Program class (for Visual C#), bring the System.ServiceModel namespace
into scope.
[Visual Basic]
...
Imports System.ServiceModel
...
[Visual C#]
...
using System.ServiceModel;
...
6.
In the Main method, create a new Uri object named baseAddress. Pass the
string http://localhost:8002/Contoso as a parameter.
[Visual Basic]
...
Dim baseAddress As New Uri("http://localhost:8002/Contoso")
...
[Visual C#]
...
Uri baseAddress = new Uri("http://localhost:8002/Contoso");
...
7.
Create a new Type object named instanceType. Initialize the instanceType
object to
com.contoso.AppointmentService.AppointmentServiceImplementation.
[Visual Basic]
...
Dim instanceType As Type = _
GetType(com.contoso.AppointmentService. _
AppointmentServiceImplementation)
...
MCT USE ONLY. STUDENT USE PROHIBITED
L2-26
L2-27
[Visual C#]
...
Type instanceType =
typeof(com.contoso.AppointmentService.
AppointmentServiceImplementation);
...
8.
Create a new ServiceHost object named host. Pass the instanceType and
baseAddress objects to the ServiceHost constructor.
[Visual Basic]
...
Dim host As New ServiceHost(instanceType, baseAddress)
...
[Visual C#]
...
ServiceHost host = new ServiceHost(instanceType, baseAddress);
...
9.
Add a Using block (for Visual Basic) or using block (for Visual C#), and then
pass the host object as a parameter.
[Visual Basic]
...
Using host
End Using
...
[Visual C#]
...
using (host)
{
}
...
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Configure and Host a WCF Service
Module 2: Configuring and Hosting WCF Services
10. In the Using block (for Visual Basic) or using block (for Visual C#), add code
to do the following:
a.
Create a new instance of the Type class named contractType. Initialize the
contractType object to
com.contoso.AppointmentService.AppointmentServiceImplementation.
b.
Create a new string variable named relativeAddress, and then initialize it
to the text AppointmentService.
c.
Add a WSHttpBinding endpoint to the host object. To do this, invoke the
AddServiceEndpoint method on the host object. Pass the contractType
variable, a new WsHttpBinding object, and the relativeAddress variable
as parameters.
d. Invoke the Open method on the host object.
e.
Write the following message to the console:
Appointment service running. Press to quit.
f.
Invoke the ReadLine method on the Console class to stop the console
from closing.
g.
Invoke the Close method on the host object.
[Visual Basic]
...
Using host
Dim contractType As Type = _
GetType(com.contoso.AppointmentService. _
AppointmentServiceContract)
Dim relativeAddress As String = "AppointmentService"
host.AddServiceEndpoint(contractType, New WSHttpBinding(), _
relativeAddress)
host.Open()
Console.WriteLine("Appointment service " & _
"running. Press to quit.")
Console.ReadLine()
host.Close()
End Using
...
MCT USE ONLY. STUDENT USE PROHIBITED
L2-28
L2-29
[Visual C#]
...
using (host)
{
Type contractType =
typeof(com.contoso.AppointmentService.
AppointmentServiceContract);
string relativeAddress = "AppointmentService";
host.AddServiceEndpoint(contractType,
new WSHttpBinding(), relativeAddress);
host.Open();
Console.WriteLine("Appointment service " +
"running. Press to quit.");
Console.ReadLine();
host.Close();
}
...
f Task 5: Change the endpoint address in the ClinicAdminClient
1.
In Solution Explorer, in the ClinicAdminClient project, right-click the
app.config (for Visual Basic) or App.config (for Visual C#) file, and then click
Edit WCF Configuration.
2
In the Microsoft Service Configuration Editor, in the left pane, expand the
Endpoints folder under the Client folder, and then click
WSHttpBinding_AppointmentServiceContract.
3
In the right pane, change the Address property to
http://localhost:8002/Contoso/AppointmentService.
4.
On the File menu, click Save, and then close the Microsoft Service
Configuration Editor.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Configure and Host a WCF Service
Module 2: Configuring and Hosting WCF Services
f Task 6: Set the ConnectedWCF solution startup projects
1.
In Solution Explorer, right-click the ConnectedWCF solution, and then click
Set Startup Projects.
2.
In the Solution 'ConnectedWCF' Property Pages dialog box, click Multiple
startup projects.
3.
In the Multiple startup projects list, set the Action for the
AppointmentServiceSelfHost and ClinicAdminClient projects to Start. Set
the Action for the remaining projects to None.
4.
In the Solution 'ConnectedWCF' Property Pages dialog box, click OK.
f Task 7: Build and run the solution
1.
On the Build menu, click Build Solution.
2.
On the Debug menu, click Start Debugging.
3.
Wait for the Console window to display the following message:
Appointment service running. Press to quit.
In the Clinic Administration Client form, on the Create Appointment tab,
click Find Slots. You should see the list of available appointments.
4.
In Visual Studio 2008, on the Debug menu, click Stop Debugging.
Results: After this exercise, you should have developed an EXE host for the
appointment service.
MCT USE ONLY. STUDENT USE PROHIBITED
L2-30
L2-31
Exercise 2: Calling a Service Hosted in a Managed
Application by Using Programmatic Configuration
In this exercise, you will programmatically define the WCF configuration for the
ClinicAdminClient project.
The main tasks for this exercise are as follows:
1.
Remove the existing endpoint configuration from the ClinicAdminClient
configuration file.
2.
Programmatically add code to define the endpoint configuration.
3.
Build and run the solution.
f Task 1: Remove the existing endpoint configuration from the
ClinicAdminClient configuration file
1.
In Visual Studio 2008, on the File menu, point to Open, and then click
Project/Solution.
2.
In the Open Project dialog box, go to either of the following:
•
If you are using Visual Basic, go to the
E:\Labfiles\Starter\VB\Ex2\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
•
If you are using Visual C#, go to the
E:\Labfiles\Starter\CS\Ex2\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
3.
In Solution Explorer, in the ClinicAdminClient project, double-click the
app.config file (for Visual Basic) or the App.config file (for Visual C#).
4.
In the Code Editor window for the configuration file, remove the
element and all its subelements.
5.
On the File menu, click Save All.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Configure and Host a WCF Service
Module 2: Configuring and Hosting WCF Services
f Task 2: Programmatically add code to define the endpoint
configuration
1.
In Solution Explorer, right-click the ClinicAdminForm class, and then click
View Code.
2.
If you are using Visual Basic, bring the System.ServiceModel namespace into
scope.
[Visual Basic]
...
Imports System.ServiceModel
...
3.
Locate the GetAppointmentServiceProxy method, and then remove the
existing method body code.
4.
In the GetAppointmentServiceProxy method, add code to do the following:
a.
Create a new instance of the EndpointAddress class named address. Pass
the text http://localhost:8002/Contoso/AppointmentService to the
constructor.
b.
Create a new instance of the WSHttpBinding class named binding.
c.
Create a new variable of type AppointmentServiceContract named proxy.
d. Instantiate the proxy object to the return value of the CreateChannel
method of the form of the ChannelFactory class that is specific to the
AppointmentServiceContract type. Pass the binding and address objects
as parameters in the method call.
e.
Return the proxy object to the method caller.
[Visual Basic]
...
Private Function GetAppointmentServiceProxy() As _
AppointmentServiceContract
Dim address As New EndpointAddress("http://localhost:8002/" & _
"Contoso/AppointmentService")
Dim binding As New WSHttpBinding()
Dim proxy As AppointmentServiceContract = _
ChannelFactory(Of AppointmentServiceContract). _
CreateChannel(binding, address)
Return proxy
End Function...
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L2-33
[Visual C#]
...
private AppointmentServiceContract GetAppointmentServiceProxy()
{
EndpointAddress address =
new EndpointAddress("http://localhost:8002/" +
"Contoso/AppointmentService");
WSHttpBinding binding = new WSHttpBinding();
AppointmentServiceContract proxy =
ChannelFactory.
CreateChannel(binding, address);
return proxy;
}
...
f Task 3: Build and run the solution
1.
On the Build menu, click Build Solution.
2.
On the Debug menu, click Start Debugging.
3.
Wait for the Console window to display the following message:
Appointment service running. Press to quit.
In the Clinic Administration Client form, on the Create Appointment tab,
click Find Slots. You should see the list of available appointments.
4.
In Visual Studio 2008, on the Debug menu, click Stop Debugging.
Results: After this exercise, you should have programmatically defined the WCF
configuration for the AppontmentServiceSelfHost and ClinicAdminClient
projects.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Configure and Host a WCF Service
Module 2: Configuring and Hosting WCF Services
Exercise 3: Defining Service Settings by Using External
Configuration
In this exercise, you will remove the programmatic WCF configuration from the
AppointmentServiceSelfHost and ClinicAdminClient projects and then provide
the configuration in external configuration files.
The main tasks for this exercise are as follows:
1.
Add an external configuration file to the AppointmentServiceSelfHost project.
2.
Remove the programmatic endpoint configuration from the
AppointmentServiceSelfHost project.
3.
Remove the programmatic endpoint configuration from the
ClinicAdminClient project.
4.
Build and run the solution.
f Task 1: Add an external configuration file to the
AppointmentServiceSelfHost project
1.
In Visual Studio 2008, on the File menu, point to Open, and then click
Project/Solution.
2.
In the Open Project dialog box, go to either of the following:
•
If you are using Visual Basic, go to the
E:\Labfiles\Starter\VB\Ex3\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
•
If you are using Visual C#, go to the
E:\Labfiles\Starter\CS\Ex3\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
3.
In Solution Explorer, right-click the AppointmentServiceSelfHost project,
point to Add, and then click New Item.
4.
In the Add New Item - AppointmentServiceSelfHost dialog box, do the
following, and then click Add:
•
If you are using Visual Basic, in the Categories pane, click General, and
then in the Templates pane, click Application Configuration File.
•
If you are using Visual C#, in the Templates pane, click Application
Configuration File.
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L2-35
5.
In Solution Explorer, in the AppointmentServiceSelfHost project, right-click
the app.config file (for Visual Basic) or the App.config file (for Visual C#), and
then click Edit WCF Configuration.
6.
In Microsoft Service Configuration Editor, in the left pane, right-click the
Services node, and then click New Service.
7.
In the right pane, in the Name box, type
com.contoso.AppointmentService.AppointmentServiceImplementation and
then press ENTER.
8.
In the left pane, expand the
com.contoso.AppointmentService.AppointmentServiceImplementation
folder under the Services folder, right-click the Endpoints folder, and then
click New Service Endpoint.
9.
In the right pane, define a new endpoint with the following information:
•
Name: APService_WsHTTP
•
Address: http://localhost:8002/Contoso/AppointmentService
•
Binding: wsHttpBinding
•
Contract:
com.contoso.AppointmentService.AppointmentServiceContract
10. On the File menu, click Save, and then close the Microsoft Service
Configuration Editor.
11. In the Microsoft Visual Studio dialog box, click Yes to All.
f Task 2: Remove the programmatic endpoint configuration from the
AppointmentServiceSelfHost project
1.
In Solution Explorer, in the AppointmentServiceSelfHost project, right-click
the Module1 class (for Visual Basic) or Program class (for Visual C#), and
then click View Code.
2.
In the Main method, make the following changes to the existing code:
a.
Remove the code that defines the baseAddress object.
b.
Remove the baseAddress parameter from the ServiceHost constructor.
c.
Remove the code that defines the contractType object and
relativeAddress string.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Configure and Host a WCF Service
Module 2: Configuring and Hosting WCF Services
d. Remove the line of code that adds a new service endpoint to the host
object.
Your code should resemble the following.
[Visual Basic]
...
Sub Main()
Dim instanceType As Type = _
GetType(com.contoso.AppointmentService. _
AppointmentServiceImplementation)
Dim host As New ServiceHost(instanceType)
Using host
host.Open()
Console.WriteLine("Appointment service " _
& "running. Press to quit.")
Console.ReadLine()
host.Close()
End Using
End Sub
...
[Visual C#]
...
static void Main(string[] args)
{
Type instanceType =
typeof(com.contoso.AppointmentService.
AppointmentServiceImplementation);
ServiceHost host = new ServiceHost(instanceType);
using (host)
{
host.Open();
Console.WriteLine("Appointment service " +
"running. Press to quit.");
Console.ReadLine();
host.Close();
}
}
...
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L2-36
L2-37
f Task 3: Remove the programmatic endpoint configuration from the
ClinicAdminClient project
1.
In Solution Explorer, in the ClinicAdminClient project, right-click the
app.config file (for Visual Basic) or App.config file (for Visual C#), and then
click Edit WCF Configuration.
2.
In the Microsoft Service Configuration Editor, in the left pane, expand Client,
right-click Endpoints, and then click New Client Endpoint.
3.
In the right pane, define a new client endpoint with the following information:
•
Name: APService_WsHTTP
•
Address: http://localhost:8002/Contoso/AppointmentService
•
Binding: wsHttpBinding
•
Contract: AppointmentServiceReference.AppointmentServiceContract
4.
On the File menu, click Save, and then close the Microsoft Service
Configuration Editor.
5.
In Solution Explorer, in the ClinicAdminClient project, right-click the
ClinicAdminForm class, and then click View Code.
6.
Locate the GetAppointmentServiceProxy method, and then do the following:
a.
Remove the existing method body code.
b.
Add code to return a new AppointmentServiceContractClient object.
[Visual Basic]
...
Private Function GetAppointmentServiceProxy() As _
AppointmentServiceContract
Return New AppointmentServiceContractClient()
End Function
...
[Visual C#]
...
private AppointmentServiceContract GetAppointmentServiceProxy()
{
return new AppointmentServiceContractClient();
}
...
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Configure and Host a WCF Service
Module 2: Configuring and Hosting WCF Services
f Task 4: Build and run the solution
1.
On the Build menu, click Build Solution.
2.
On the Debug menu, click Start Debugging.
3.
Wait for the Console window to display the following message:
Appointment service running. Press to quit.
In the Clinic Administration Client form, on the Create Appointment tab,
click Find Slots. You should see the list of available appointments.
4.
In Visual Studio 2008, on the Debug menu, click Stop Debugging.
Results: After this exercise, you should have defined the WCF configuration for the
AppontmentServiceSelfHost and ClinicAdminClient projects in external
configuration files.
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L2-38
L2-39
Exercise 4: Employing Different Hosting Options for a
Service
In this exercise, you will host the appointment service with WAS. To use WAS, you
will add additional endpoints to both the AppointmentServiceIISHost and the
ClinicAdminClient projects.
The main tasks for this exercise are as follows:
1.
Add a new Application directory to IIS.
2.
Add the net.tcp binding to the WAS configuration.
3.
Enable TCP support for the AppointmentServiceIISHost application.
4.
Configure a TCP endpoint for the AppointmentServiceIISHost application.
5.
Configure a TCP binding for the ClinicAdminClient application.
6.
Set the ConnectedWCF solution startup projects.
7.
Build and run the solution.
f Task 1: Add a new Application directory to IIS
1.
On the Start menu, click Control Panel.
2.
In the Control Panel window, click System Maintenance.
3.
In the Control Panel\System and Maintenance window, click Administrative
Tools.
4.
In the Administrative Tools window, click Internet Information Services (IIS)
Manager.
5.
In the User Account Control dialog box, click Continue.
6.
In the Internet Information Services (IIS) Manager window, in the left pane,
expand LON-DEV (LON-DEV\Student), and then expand Web Sites.
7.
Right-click Default Web Site, and then click Add Application.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Configure and Host a WCF Service
Module 2: Configuring and Hosting WCF Services
8.
9.
In the Add Application dialog box, add a new application with the following
details, and then click OK.
•
Alias: AppointmentServiceIISHost
•
Physical path: If you are using Visual Basic, go to
E:\Labfiles\Starter\VB\Ex4\ConnectedWCF\AppointmentServiceIISH
ost. If you are using Visual C#, go to
E:\Labfiles\Starter\CS\Ex4\ConnectedWCF\AppointmentServiceIISH
ost.
Close the Internet Information Services (IIS) Manager window.
f Task 2: Add the net.tcp binding to the WAS configuration
1.
In Windows Explorer, go to E:\Labfiles\Starter\, right-click the
AddTcpBindingToWas.cmd file, and then click Edit.
2.
Examine the command, and then close Notepad.
3.
Right-click the AddTcpBindingToWas.cmd file, and then click Run as
administrator.
4.
In the User Account Control dialog box, click Continue.
5.
In the Command Prompt window, ensure the command executed successfully,
and then press ENTER.
f Task 3: Enable TCP support for the AppointmentServiceIISHost
application
1.
In Windows Explorer, in the E:\Labfile\Starter\ folder, right-click the
AppointmentServiceIISHostTcpSupport.cmd file, and then click Edit.
2.
Examine the command, and then close Notepad.
3.
Right-click the AppointmentServiceIISHostTcpSupport.cmd file, and then
click Run as administrator.
4.
In the User Account Control dialog box, click Continue.
5.
In the Command Prompt window, ensure the command executed successfully,
and then press ENTER.
6.
Close Windows Explorer.
MCT USE ONLY. STUDENT USE PROHIBITED
L2-40
L2-41
f Task 4: Configure a TCP endpoint for the AppointmentServiceIISHost
application
1.
In Visual Studio 2008, on the File menu, point to Open, and then click
Project/Solution.
2.
In the Open Project dialog box, go to either of the following:
•
If you are using Visual Basic, go to the
E:\Labfiles\Starter\VB\Ex4\ConnectedWCF folder, and then doubleclick the ConnectedWCF.sln file.
•
If you are using Visual C#, go to the
E:\Labfiles\Starter\CS\Ex4\ConnectedWCF folder, and then doubleclick the ConnectedWCF.sln file.
3.
In Solution Explorer, in the AppointmentServiceIISHost project, right-click
the Web.config file, and then click Edit WCF Configuration.
4.
In the left pane, under Services, expand
com.contoso.AppointmentService.AppointmentServiceImplementation,
right-click Endpoints, and then click New Service Endpoint.
5.
In the right-pane, define a service endpoint with the following details:
6.
•
Name: APService_TCP
•
Address:
net.tcp://localhost:9090/AppointmentServiceIISHost/AppointmentSer
viceIISHost.svc
•
Binding: netTcpBinding
•
Contract:
com.contoso.AppointmentService.AppointmentServiceContract
On the File menu, click Save, and then close the WCF Configuration Editor.
f Task 5: Configure a TCP binding for the ClinicAdminClient application
1.
In Solution Explorer, in the ClinicAdminClient project, right-click the
app.config file (for Visual Basic) or App.config file (for Visual C#), and then
click Edit WCF Configuration.
2.
In the Microsoft Service Configuration Editor, in the left pane, under the
Client folder, right-click Endpoints, and then click New Client Endpoint.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Configure and Host a WCF Service
Module 2: Configuring and Hosting WCF Services
3.
In the right pane, define a new client endpoint with the following information:
•
Name: APService_TCP
•
Address:
net.tcp://localhost:9090/AppointmentServiceIISHost/AppointmentSer
viceIISHost.svc
•
Binding: netTcpBinding
•
Contract: AppointmentServiceReference.AppointmentServiceContract
4.
On the File menu, click Save, and then close the Microsoft Service
Configuration Editor.
5.
In Solution Explorer, right-click the ClinicAdminForm, and then click View
Code.
6.
In the Code Editor window, for the ClinicAdminForm class, locate the
GetAppointmentServiceProxy method, and then pass the string
APService_TCP to the AppointmentServiceContractClient constructor.
[Visual Basic]
...
Private Function GetAppointmentServiceProxy() As _
AppointmentServiceContract
Return New AppointmentServiceContractClient("APService_TCP")
End Function
...
[Visual C#]
...
private AppointmentServiceContract GetAppointmentServiceProxy()
{
return new AppointmentServiceContractClient("APService_TCP");
}
...
MCT USE ONLY. STUDENT USE PROHIBITED
L2-42
L2-43
f Task 6: Set the ConnectedWCF solution startup projects
1.
In the Solution Explorer window, right-click Solution 'ConnectedWCF', and
then click Set Startup Projects.
2.
In the Solution 'ConnectedWCF' Property Pages dialog box, click Single
startup project.
3.
In the Solution 'ConnectedWCF' Property Pages dialog box, click OK.
f Task 7: Build and run the solution
1.
On the Build menu, click Build Solution.
2.
On the Debug menu, click Start Debugging.
3.
In the Clinic Administration Client form, on the Create Appointment tab,
click Find Slots. You should see the list of available appointments.
4.
In Visual Studio 2008, on the Debug menu, click Stop Debugging.
Results: After this exercise, you should have hosted the appointment service in IIS
using WAS.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Configure and Host a WCF Service
L3-45
Module 3: Endpoints and Behaviors
Lab: Changing Service Endpoints
and Behaviors
Scenario
You are a developer on the Contoso, Ltd Clinic Management product team. Your
manager has asked you to look at exposing the Appointment service to both
Internet and intranet clients and to lock down security a little by removing the
metadata endpoint. You must also experiment with exposing a metadata endpoint,
and configuring the Patient Letter service to interoperate with an existing ASP.NET
legacy Web service.
Logon Information:
•
Virtual Machine: 6461-LON-DEV-03
•
User Name: Student
•
Password: Pa$$w0rd
Estimated time: 60 minutes
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Changing Service Endpoints and Behaviors
Module 3: Endpoints and Behaviors
Exercise 1: Exposing Services by Using Different Bindings
In this exercise, you will configure both a wsHttpBinding and a netTcpBinding
endpoint for the Appointment service. You will then manually generate a service
proxy class by using the Svcutil.exe tool. You will then add the necessary WCF
configuration to the ClinicAdminClient and FPAdminClient client applications.
The main tasks for this exercise are as follows:
1.
Start the 6461-LON-DEV-03 virtual machine and log on as Student.
2.
Open the existing ConnectedWCF solution.
3.
Add a netTcpBinding and a wsHttpBiniding endpoint to the Appointment
service.
4.
Generate a service proxy by using Svcutil.exe.
5.
Add the proxy to the FPAdminClient project and configure a wsHttpBinding
binding.
6.
Add the proxy to the ClinicAdminClient project and configure a
netTcpBinding binding.
7.
Set the ConnectedWCF solution startup projects.
8.
Build and run the solution.
f Task 1: Start the 6461-LON-DEV-03 virtual machine and log on as
Student
1.
Open the Virtual Server Remote Control Client and double-click 6461-LONDEV-03.
2.
Log on to 6461-LON-DEV-03 as Student using the password Pa$$w0rd.
f Task 2: Open the existing ConnectedWCF solution
1.
On the Start menu, click All Programs, click Microsoft Visual Studio 2008,
right-click Microsoft Visual Studio 2008, and then click Run as
administrator.
2.
In the User Account Control dialog box, click Continue.
3.
In Visual Studio 2008, on the File menu, point to Open, and then click
Project/Solution.
MCT USE ONLY. STUDENT USE PROHIBITED
L3-46
4.
L3-47
In the Open Project dialog box, go to either of the following:
•
If you are using Microsoft® Visual Basic® development system, go to the
E:\Labfiles\Starter\VB\Ex1\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
•
If you are using Microsoft Visual C#® development tool, go to the
E:\Labfiles\Starter\CS\Ex1\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
f Task 3: Add a netTcpBinding and a wsHttpBiniding endpoint to the
Appointment service
1.
In the Solution Explorer window, in the AppointmentServiceSelfHost project,
right-click the App.config file, and then click Edit WCF Configuration.
2.
In the Microsoft Service Configuration Editor window, in the Configuration
pane, expand
com.contoso.AppointmentService.AppointmentServiceImplementation,
right-click Endpoints, and then click New Service Endpoint.
3.
In the Service Endpoint pane, define a service endpoint with the following
information:
•
Name: APService_TCP
•
Address: IntranetAppointmentService
•
Binding: netTcpBinding
•
Contract:
com.contoso.AppointmentService.AppointmentServiceContract
4.
In the Configuration pane, right-click Endpoints, and then click New Service
Endpoint.
5.
In the Service Endpoint pane, define a second service endpoint with the
following information:
•
Name: APService_wsHTTP
•
Address: InternetAppointmentService
•
Binding: wsHttpBinding
•
Contract:
com.contoso.AppointmentService.AppointmentServiceContract
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Changing Service Endpoints and Behaviors
Module 3: Endpoints and Behaviors
6.
In the Configuration pane, click Host.
7.
In the BaseAddresses section, click New.
8.
In the Base Address Editor dialog box, in the Base address box, type
http://localhost:8002/Contoso and then click OK.
9.
In the BaseAddresses section, click New.
10. In the Base Address Editor dialog box, in the Base address box, type
net.tcp://localhost/Contoso and then click OK.
11. In the Microsoft Service Configuration Editor window, on the File menu, click
Save.
12. Close the Microsoft Service Configuration Editor window.
13. In the Solution Explorer window, right-click the AppointmentServiceSelfHost
project, and then click Build.
f Task 4: Generate a service proxy by using Svcutil.exe
1.
In Windows Explorer, go to the E:\Labfiles\Starter\Proxy folder.
2.
If you are using Visual Basic, right-click GenerateVbProxy.cmd, and then click
Edit.
If you are using Visual C#, right-click GenerateCsProxy.cmd, and then click
Edit.
3.
Examine the command, and then close Notepad.
4.
If you are using Visual Basic, right-click GenerateVbProxy.cmd, and then click
Run as administrator.
If you are using Visual C#, right-click GenerateCsProxy.cmd, and then click
Run as administrator.
5.
In the User Account Control dialog box, click Continue.
6.
In the Command Prompt window, ensure that the command executed
successfully, and then press ENTER.
MCT USE ONLY. STUDENT USE PROHIBITED
L3-48
L3-49
f Task 5: Add the proxy to the FPAdminClient project and configure a
wsHttpBinding binding
1.
Switch to Visual Studio 2008.
2.
In the Solution Explorer window, right-click the FPAdminClient project, point
to Add, and then click Existing Item.
3.
In the Add Existing Item - FPAdminClient dialog box, go to the following file,
and then click Add:
4.
•
If you are using Visual Basic, go to E:\Labfiles\Starter\Proxy\
contoso.com.services.AppointmentService.vb.
•
If you are using Visual C#, go to E:\Labfiles\Starter\Proxy\
contoso.com.services.AppointmentService.cs.
In the Solution Explorer window, in the FPAdminClient project, right-click the
following file, and then click Edit WCF Configuration:
•
If you are using Visual Basic, right-click the app.config file.
•
If you are using Visual C#, right-click the App.config file.
5.
In the Microsoft Service Configuration Editor window, in the Configuration
pane, expand Client, right-click Endpoints, and then click New Client
Endpoint.
6.
In the Client Endpoint pane, define a new client endpoint with the following
information:
•
Name: APService_wsHTTP
•
Address: http://localhost:8002/Contoso/InternetAppointmentService
•
Binding: wsHttpBinding
•
Contract: AppointmentServiceContract
7.
In the Microsoft Service Configuration Editor window, on the File menu, click
Save.
8.
Close the Microsoft Service Configuration Editor window.
9.
In the Solution Explorer window, right-click the FPAdminClient project, and
then click Build.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Changing Service Endpoints and Behaviors
Module 3: Endpoints and Behaviors
f Task 6: Add the proxy to the ClinicAdminClient project and configure
a netTcpBinding binding
1.
In the Solution Explorer window, right-click the ClinicAdminClient project,
point to Add, and then click Existing Item.
2.
In the Add Existing Item - ClinicAdminClient dialog box, go to the following
file, and then click Add:
3.
•
If you are using Visual Basic, go to E:\Labfiles\Starter\Proxy\
contoso.com.services.AppointmentService.vb.
•
If you are using Visual C#, go to E:\Labfiles\Starter\Proxy\
contoso.com.services.AppointmentService.cs.
In the Solution Explorer window, in the ClinicAdminClient project, right-click
the following file, and then click Edit WCF Configuration:
•
If you are using Visual Basic, right-click the app.config file.
•
If you are using Visual C#, right-click the App.config file.
4.
In the Microsoft Service Configuration Editor window, in the Configuration
pane, expand Client, right-click Endpoints, and then click New Client
Endpoint.
5.
In the Client Endpoint pane, define a new client endpoint with the following
information:
•
Name: APService_TCP
•
Address: net.tcp://localhost/Contoso/IntranetAppointmentService
•
Binding: netTcpBinding
•
Contract: AppointmentServiceContract
6.
In the Microsoft Service Configuration Editor window, on the File menu, click
Save.
7.
Close the Microsoft Service Configuration Editor window.
8.
In the Solution Explorer window, right-click the ClinicAdminClient project,
and then click Build.
MCT USE ONLY. STUDENT USE PROHIBITED
L3-50
L3-51
f Task 7: Set the ConnectedWCF solution startup projects
1.
In the Solution Explorer window, right-click the ConnectedWCF solution, and
then click Set Startup Projects.
2.
In the Solution 'ConnectedWCF' Property Pages dialog box, click Multiple
startup projects.
3.
In the Multiple startup projects list, set the Action for the
AppointmentServiceSelfHost, ClinicAdminClient, and FPAdminClient
projects to Start. Set the Action for the remaining projects to None.
4.
In the Solution 'ConnectedWCF' Property Pages dialog box, click OK.
f Task 8: Build and run the solution
1.
On the Build menu, click Build Solution.
2.
On the Debug menu, click Start Debugging.
3.
In the Windows Security Alert dialog box, click Unblock.
4.
Wait for the Console window to display the message Appointment service
running.
5,
In the FP Admin Client form, on the Create Appointment tab, click Find
Slots.
Ensure that the Slots box is populated with a list of available appointment
times.
6,
In the Clinic Administration Client form, on the Create Appointment tab,
click Find Slots.
Ensure that the Slots box is populated with a list of available appointment
times.
7.
In Visual Studio 2008, on the Debug menu, click Stop Debugging.
Results: After this exercise, you should have exposed the Appointment service over
a netTcpBinding and wsHttpBinding endpoint.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Changing Service Endpoints and Behaviors
Module 3: Endpoints and Behaviors
Exercise 2: Adding Metadata Exchange to a Service
Scenario
In this exercise, you will add IMetadataExchange endpoints to the Appointment
service to expose metadata over both TCP and HTTP. You will then use the Add
Service Reference tool in Visual Studio 2008 to generate a proxy object from the
metadata.
The main tasks for this exercise are as follows:
1.
Add a mexHttpBinding endpoint and a mexTcpBinding endpoint to the
Appointment service.
2.
Set the ConnectedWCF solution startup projects.
3.
Add a service reference to the FPAdminClient project.
4.
Add a service reference to the ClinicAdminClient project.
5.
Set the ConnectedWCF solution startup projects.
6.
Build and run the solution.
f Task 1: Add a mexHttpBinding endpoint and a mexTcpBinding
endpoint to the Appointment service
1.
In Visual Studio 2008, on the File menu, point to Open, and then click
Project/Solution.
2.
In the Open Project dialog box, go to either of the following:
•
If you are using Visual Basic, go to the
E:\Labfiles\Starter\VB\Ex2\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
•
If you are using Visual C#, go to the
E:\Labfiles\Starter\CS\Ex2\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
3.
In the Solution Explorer window, in the AppointmentServiceSelfHost project,
right-click the App.config file, and then click Edit WCF Configuration.
4.
In the Microsoft Service Configuration Editor window, in the Configuration
pane, expand Advanced, right-click Service Behaviors, and then click New
Service Behavior Configuration.
MCT USE ONLY. STUDENT USE PROHIBITED
L3-52
5.
In the Behavior: NewBehavior pane, in the Name box, type
AppointmentServiceBehavior
6.
In the Behavior element extension position section, click Add.
7.
In the Adding Behavior Element Extension Sections dialog box, click
serviceMetadata, and then click Add.
8.
In the Configuration pane, under AppointmentServiceBehavior, click
serviceMetadata.
9.
In the serviceMetadata pane, set the HttpGetEnabled property to True.
L3-53
10. In the Configuration pane, under Services, click
com.contoso.AppointmentService.AppointmentServiceImplementation.
11. In the Service:
com.contoso.AppointmentService.AppointmentServiceImplementation
pane, set the BehaviorConfiguration property to
AppointmentServiceBehavior.
12. In the Configuration pane, expand
com.contoso.AppointmentService.AppointmentServiceImplementation,
right-click Endpoints, and then click New Service Endpoint.
13. In the Service Endpoint pane, define a service endpoint with the following
information:
•
Name: APService_mexHttp
•
Binding: mexHttpBinding
•
Contract: IMetadataExchange
14. In the Configuration pane, right-click Endpoints, and then click New Service
Endpoint.
15. In the Service Endpoint pane, define a service endpoint with the following
information:
•
Name: APService_mexTcp
•
Binding: mexTcpBinding
•
Contract: IMetadataExchange
16. In the Microsoft Service Configuration Editor window, on the File menu, click
Save.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Changing Service Endpoints and Behaviors
Module 3: Endpoints and Behaviors
17. Close the Microsoft Service Configuration Editor window.
18. In the Solution Explorer window, right-click the AppointmentServiceSelfHost
project, and then click Build.
f Task 2: Set the ConnectedWCF solution startup projects
1.
In the Solution Explorer window, right-click the ConnectedWCF solution, and
then click Set Startup Projects.
2.
In the Solution 'ConnectedWCF' Property Pages dialog box, click Single
startup project.
3.
In the Single startup project list, click AppointmentServiceSelfHost.
4.
In the Solution 'ConnectedWCF' Property Pages dialog box, click OK.
5.
On the Debug menu, click Start Without Debugging.
6.
In the Windows Security Alert dialog box, click Unblock.
Leave the AppointmentServiceSelfHost console running.
f Task 3: Add a service reference to the FPAdminClient project
1.
In the Solution Explorer window, in the FPAdminClient project, right-click the
following class, and then click Delete:
•
If you are using Visual Basic, right-click the
contoso.com.services.AppointmentService.vb class.
•
If you are using Visual C#, right-click the
contoso.com.services.AppointmentService.cs class.
2.
In the Microsoft Visual Studio dialog box, click OK.
3.
In the Solution Explorer window, in the FPAdminClient project, double-click
the following file:
•
If you are using Visual Basic, double-click the app.config file.
•
If you are using Visual C#, double-click the App.config file.
4.
In the Code Editor window, remove the system.serviceModel element.
5.
On the File menu, click Close.
MCT USE ONLY. STUDENT USE PROHIBITED
L3-54
L3-55
6.
In the Microsoft Visual Studio dialog box, click Yes.
7.
In the Solution Explorer window, right-click the FPAdminClient project, and
then click Add Service Reference.
8.
In the Add Service Reference dialog box, define a service reference with the
following information, and then click OK.
9.
•
Address: In the Address box, type http://localhost:8002/Contoso and
then click Go.
•
Namespace: In the Namespace box, type AppointmentServiceReference
In the Solution Explorer window, in the FPAdminClient project, right-click the
FPAdminForm class, and then click View Code.
10. In the Code Editor window for the FPAdminForm class, add code to bring the
FPAdminClient.AppointmentServiceReference namespace into scope.
[Visual Basic]
...
Imports FPAdminClient.AppointmentServiceReference
...
[Visual C#]
...
using FPAdminClient.AppointmentServiceReference;
...
11. Locate the GetAppointmentServiceProxy method, and then pass the string
APService_wsHTTP in the AppointmentServiceContractClient constructor.
[Visual Basic]
...
Private Function GetAppointmentServiceProxy() As _
AppointmentServiceContract
Return New AppointmentServiceContractClient("APService_wsHTTP")
End Function
...
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Changing Service Endpoints and Behaviors
Module 3: Endpoints and Behaviors
[Visual C#]
...
private AppointmentServiceContract GetAppointmentServiceProxy()
{
return new AppointmentServiceContractClient("APService_wsHTTP");
}
...
12. In the Solution Explorer window, right-click the FPAdminClient project, and
then click Build.
f Task 4: Add a service reference to the ClinicAdminClient project
1.
In the Solution Explorer window, in the ClinicAdminClient project, right-click
the following class, and then click Delete:
•
If you are using Visual Basic, right-click the
contoso.com.services.AppointmentService.vb class.
•
If you are using Visual C#, right-click the
contoso.com.services.AppointmentService.cs class.
2.
In the Microsoft Visual Studio dialog box, click OK.
3.
In the Solution Explorer window, in the ClinicAdminClient project, doubleclick the following file:
•
If you are using Visual Basic, double-click the app.config file.
•
If you are using Visual C#, double-click the App.config file.
4.
In the Code Editor window, remove the system.serviceModel element.
5.
On the File menu, click Close.
6.
In the Microsoft Visual Studio dialog box, click Yes.
7.
In the Solution Explorer window, right-click the ClinicAdminClient project,
and then click Add Service Reference.
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L3-56
8.
9.
L3-57
In the Add Service Reference dialog box, define a service reference with the
following information, and then click OK.
•
Address: In the Address box, type net.tcp://localhost/Contoso and then
click Go.
•
Namespace: In the Namespace box, type AppointmentServiceReference
In the Solution Explorer window, in the ClinicAdminClient project, right-click
the ClinicAdminForm class, and then click View Code.
10. In the Code Editor window for the ClinicAdminForm class, add code to bring
the ClinicAdminClient.AppointmentServiceReference namespace into scope.
[Visual Basic]
...
Imports ClinicAdminClient.AppointmentServiceReference
...
[Visual C#]
...
using ClinicAdminClient.AppointmentServiceReference;
...
11. Locate the GetAppointmentServiceProxy method, and then pass the string
APService_TCP in the AppointmentServiceContractClient constructor.
[Visual Basic]
...
Private Function GetAppointmentServiceProxy() As _
AppointmentServiceContract
Return New AppointmentServiceContractClient("APService_TCP")
End Function
...
[Visual C#]
...
private AppointmentServiceContract GetAppointmentServiceProxy()
{
return new AppointmentServiceContractClient("APService_TCP");
}
...
12. In the Solution Explorer window, right-click the ClinicAdminClient project,
and then click Build.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Changing Service Endpoints and Behaviors
Module 3: Endpoints and Behaviors
f Task 5: Set the ConnectedWCF solution startup projects
1.
In the Solution Explorer window, right-click the ConnectedWCF solution, and
then click Set Startup Projects.
2.
In the Solution 'ConnectedWCF' Property Pages dialog box, click Multiple
startup projects.
3.
In the Multiple startup projects list, set the Action for the
AppointmentServiceSelfHost, ClinicAdminClient, and FPAdminClient
projects to Start. Set the Action for the remaining projects to None.
4.
In the Solution 'ConnectedWCF' Property Pages dialog box, click OK.
f Task 6: Build and run the solution
1.
Switch to the AppointmentServiceSelfHost console, and close the console
window.
2.
On the Build menu, click Build Solution.
3.
On the Debug menu, click Start Debugging.
4.
In the Windows Security Alert dialog box, click Unblock.
5.
Wait for the Console window to display the message Appointment service
running.
6,
In the FP Admin Client form, on the Create Appointment tab, click Find
Slots.
Ensure that the Slots box is populated with a list of available appointment
times.
7,
In the Clinic Administration Client form, on the Create Appointment tab,
click Find Slots.
Ensure that the Slots box is populated with a list of available appointment
times.
8.
In Visual Studio 2008, on the Debug menu, click Stop Debugging.
Results: After this exercise, you should have exposed an IMetadataExchange
endpoint for netTcpBinding and wsHttpBinding, and then used the Add Service
Reference function in Visual Studio to generate a proxy object.
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L3-58
L3-59
Exercise 3: Creating WCF Clients and Services That
Interoperate with Non-WCF Web Services
Scenario
In this exercise, you will add the necessary code and WCF configuration to the
existing Patient Letter WCF service to interoperate with a legacy Web service.
The main tasks for this exercise are as follows:
1.
Host a legacy Web service in Internet Information Services (IIS).
2.
Create a proxy for the PatientLetterService project.
3.
Add the proxy to the PatientLetterService project.
4.
Configure a basicHttpBinding for the PatientLetterService project.
5.
Add code to call the methods in the PatientLetterService project.
6.
Build and run the solution.
f Task 1: Host a legacy Web service in IIS
1.
On the Start menu, click Control Panel.
2.
In the Control Panel window, click System and Maintenance.
3.
In the Control Panel\System and Maintenance window, click Administrative
Tools.
4.
In the Administrative Tools window, double-click Internet Information
Services (IIS) Manager.
5.
In the User Account Control dialog box, click Continue.
6.
In the Internet Information Services (IIS) Manager window, in the left pane,
expand LON-DEV (LON-DEV\Student), and then expand Web Sites.
7.
Right-click Default Web Site, and then click Add Application.
8.
In the Add Application dialog box, add a new application with the following
details, and then click OK.
9.
•
Alias: PatientInformationService
•
Physical path:
E:\Labfiles\Starter\LegacyWebServices\PatientInformationService
Close the Internet Information Services (IIS) Manager window.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Changing Service Endpoints and Behaviors
Module 3: Endpoints and Behaviors
10. On the Start menu, click Internet Explorer.
11. In the Address bar, type
http://localhost/PatientInformationService/Service.asmx and then press
ENTER.
If you have hosted the Web service correctly, you will see the default
PatientInformationService page.
12. In the Information Bar dialog box, click Close.
13. On the PatientInformationService page, click Service Description.
Windows® Internet Explorer® will now display the Web Services Description
Language (WSDL) document for the Web service.
14. In the Information Bar dialog box, click Close.
15. Close Internet Explorer.
f Task 2: Create a proxy for the PatientLetterService project
1.
In Windows Explorer, go to the E:\Labfiles\Starter\LegacyWebServices folder.
2.
Right-click the following file, and then click Edit:
•
If you are using Visual Basic, right-click the GenerateLegacyVbProxy.cmd
file.
•
If you are using Visual C#, right-click the GenerateLegacyCsProxy.cmd
file.
3.
Examine the command, and then close Notepad.
4.
Right-click the following file, and then click Run as administrator:
•
If you are using Visual Basic, right-click GenerateLegacyVbProxy.cmd.
•
If you are using Visual C#, right-click GenerateLegacyCsProxy.cmd.
5.
In the User Account Control dialog box, click Continue.
6.
In the Command Prompt window, ensure that the command executed
successfully, and then press ENTER.
MCT USE ONLY. STUDENT USE PROHIBITED
L3-60
L3-61
f Task 3: Add the proxy to the PatientLetterService project
1.
In Visual Studio 2008, on the File menu, point to Open, and then click
Project/Solution.
2.
In the Open Project dialog box, go to either of the following:
•
If you are using Visual Basic, go to the
E:\Labfiles\Starter\VB\Ex3\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
•
If you are using Visual C#, go to the
E:\Labfiles\Starter\CS\Ex3\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
3.
In the Solution Explorer window, right-click the PatientLetterService project,
point to Add, and then click Existing Item.
4.
In the Add Existing Item - PatientLetterService dialog box, go to the
following file, and then click Add.
•
If you are using Visual Basic, go to
E:\Labfiles\Starter\LegacyWebServices\LegacyPatientInformationService
Proxy.vb.
•
If you are using Visual C#, go to
E:\Labfiles\Starter\LegacyWebServices\LegacyPatientInformationService
Proxy.cs.
f Task 4: Configure a basicHttpBinding for the PatientLetterService
project
1.
In the Solution Explorer window, in the AppointmentServiceSelfHost project,
right-click the App.config file, and then click Edit WCF Configuration.
2.
In the Microsoft Service Configuration Editor window, in the Configuration
pane, expand Client, right-click Endpoints, and then click New Client
Endpoint.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Changing Service Endpoints and Behaviors
Module 3: Endpoints and Behaviors
3.
In the Client Endpoint pane, define a client endpoint with the following
information:
•
Name: PatientInformationServiceSoap
•
Address: http://localhost/PatientInformationService/Service.asmx
•
Binding: basicHttpBinding
•
Contract: PatientInformationServiceSoap
4.
In the Microsoft Service Configuration Editor window, on the File menu, click
Save.
5.
Close the Microsoft Service Configuration Editor window.
f Task 5: Add code to call the methods in the PatientLetterService
project
1.
In the Solution Explorer window, in the PatientLetterService project, right-click
the PatientLetterServiceImplementation class, and then click View Code.
2.
In the Code Editor window, locate the TODO 1 comment, and add code to
bring the contoso.com.ClinicManagementSystem._2004._07 namespace into
scope.
[Visual Basic]
...
'TODO 1
Imports contoso.com.ClinicManagementSystem._2004._07
...
[Visual C#]
...
//TODO 1
using contoso.com.ClinicManagementSystem._2004._07;
...
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L3-62
3.
L3-63
In the PopulateTemplate method, locate the TODO 2 comment, and add
code to do the following:
•
Create a new instance of the PatientInformationServiceSoapClient class
called patientInformationService. Pass the string
PatientInformationServiceSoap to the constructor.
•
Create a new instance of the PatientDetails class called details, and then
initialize it to the return value of the GetPatientDetails method in the
patientInformationService object. Pass the patientId variable as a
parameter in the method call.
[Visual Basic]
...
'TODO 2
Dim patientInformationService As New _
PatientInformationServiceSoapClient( _
"PatientInformationServiceSoap")
Dim patientDetails As PatientDetails = _
patientInformationService.GetPatientDetails(patientId)
...
[Visual C#]
...
//TODO 2
PatientInformationServiceSoapClient patientInformationService
= new PatientInformationServiceSoapClient(
"PatientInformationServiceSoap");
PatientDetails patientDetails =
patientInformationService.GetPatientDetails(patientId);
...
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Changing Service Endpoints and Behaviors
Module 3: Endpoints and Behaviors
f Task 6: Build and run the solution
1.
On the Build menu, click Build Solution.
2.
On the Debug menu, click Start Debugging.
3.
In the Windows Security Alert dialog box, click Unblock.
4.
Wait for the Console window to display the message Appointment service
and patient letter service running. Press to quit.
5,
In the Clinic Administration Client form, on the Create Appointment tab,
click Find Slots.
6.
In the Patient box, type NH991199Z and then click Create.
7.
In the Appointment Created dialog box, click OK.
8.
Switch to the AppointmentServiceSelfHost console window, and verify that the
Entered SendLetter and Exited SendLetter messages are displayed.
9.
Open Windows Explorer, and go to the E:\Labfiles\Starter\Letters folder.
10 In the Letters folder, double-click the NH991199Z.txt file.
The file contains a basic letter that provides details of the appointment.
Results: After this exercise, you should have added the necessary code and WCF
configuration to the Patient Letter WCF service to interoperate with a legacy .asmx
Web service.
MCT USE ONLY. STUDENT USE PROHIBITED
L3-64
L4-65
Module 4: Debugging and Diagnostics
Lab: Message Logging and Activity
Tracing
Scenario
You are a developer on the Contoso Clinic Management product team. You have
been involved in the development of the appointment service and your manager
has now asked you to add additional configuration to the service to log messages
sent to and from the clients and to monitor the activities the clients and service
performs.
Logon Information:
•
Virtual Machine: 6461A-LON-DEV-04
•
User Name: Student
•
Password: Pa$$w0rd
Estimated time: 40 minutes
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Message Logging and Activity Tracing
Module 4: Debugging and Diagnostics
Exercise 1: Generating Logging Information for a Service
In this exercise, you will configure the AppointmentService, the
PatientManagementService, and the ClinicAdminClient to log messages. You will
then analyze these messages by using the Microsoft Service Trace Viewer tool.
The main tasks for this exercise are as follows:
1.
Start the 6461-LON-DEV-04 virtual machine and log on as Student.
2.
Open the existing WCFConnected solution.
3.
Enable message logging for the AppointmentService and the
PatientManagementService.
4.
Enable message logging for the ClinicAdminClient.
5.
Build and run the solution.
6.
View the message logs.
f Task 1: Start the 6461-LON-DEV-04 virtual machine and log on as
Student
1.
Open the Virtual Server Remote Control Client and double-click 6461-LONDEV-04.
2.
Log on to 6461-LON-DEV-04 as Student using the password Pa$$w0rd.
f Task 2: Open the existing WCFConnected solution
1.
On the Start menu, point to All Programs, point to Microsoft Visual Studio
2008, right-click Microsoft Visual Studio 2008, and then click Run as
administrator.
2.
In the User Account Control dialog box, click Continue.
3.
In Visual Studio 2008, on the File menu, point to Open, and then click
Project/Solution.
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L4-66
4.
L4-67
In the Open Project dialog box, go either of the following:
•
If you are using Microsoft® Visual Basic® development system, go to the
E:\Labfiles\Starter\VB\Ex1\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
•
If you are using Microsoft Visual C#® development tool, go to the
E:\Labfiles\Starter\CS\Ex1\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
f Task 3: Enable message logging for the AppointmentService and the
PatientManagementService
1.
In Solution Explorer, within the ServiceSelfHost project, right-click the
app.config file (for Visual Basic) or the App.config file (for Visual C#), and
then click Edit WCF Configuration.
2.
In the Microsoft Service Configuration Editor window, in the Configuration
pane, click Diagnostics.
3.
In the Diagnostics pane, do the following:
•
Click Enable Log Auto Flush.
•
Click Enable MessageLogging.
•
Click ServiceModelMessageLoggingListener.
4.
In the Listener Settings dialog box, in the Log file box, type
E:\Labfiles\Starter\Logs\service_messages.svclog and then click OK.
5.
In the Configuration pane, expand Diagnostics, and then click Message
Logging.
6.
In the Message Logging pane, do the following:
•
Set LogEntireMessage to True.
•
Set LogMessagesAtServiceLevel to True.
7.
In the Configuration pane, expand Sources, and then click
System.ServiceModel.MessageLogging.
8.
In the Trace Source: System.ServiceModel.MessageLogging pane, in the
Trace level list, click Information.
9.
In the Microsoft Service Configuration Editor window, on the File menu, click
Save.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Message Logging and Activity Tracing
Module 4: Debugging and Diagnostics
10. Close the Microsoft Service Configuration Editor window.
f Task 4: Enable message logging for the ClinicAdminClient
1.
In Solution Explorer, within the ClinicAdminClient project, right-click the
app.config file (for Visual Basic) or the App.config file (for Visual C#), and
then click Edit WCF Configuration.
2.
In the Microsoft Service Configuration Editor window, in the Configuration
pane, click Diagnostics.
3.
In the Diagnostics pane, do the following:
•
Click Enable Log Auto Flush.
•
Click Enable MessageLogging.
•
Click ServiceModelMessageLoggingListener.
4.
In the Listener Settings dialog box, in the Log file box, type
E:\Labfiles\Starter\Logs\client_messages.svclog and then click OK.
5.
In the Configuration pane, expand Diagnostics, and then click Message
Logging.
6.
In the Message Logging pane, do the following:
•
Set LogEntireMessage to True.
•
Set LogMessagesAtServiceLevel to True.
7.
In the Configuration pane, expand Sources, and then click
System.ServiceModel.MessageLogging.
8.
In the Trace Source: System.ServiceModel.MessageLogging pane, in the
Trace level list, click Information.
9.
In the Microsoft Service Configuration Editor window, on the File menu, click
Save.
10. Close the Microsoft Service Configuration Editor window.
f Task 5: Build and run the solution
1.
On the Build menu, click Build Solution.
2.
On the Debug menu, click Start Debugging.
3.
If the Windows Security Alert dialog box appears, click Unblock.
MCT USE ONLY. STUDENT USE PROHIBITED
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L4-69
4.
Wait for the Console window to display the message Service running.
5,
In the Clinic Administration Client form, on the Create Appointment tab,
click Find Slots.
Ensure the Slots box is populated with a list of available appointment times.
6.
In Visual Studio 2008, on the Debug menu, click Stop Debugging.
f Task 6: View the message logs
1.
On the Start menu, point to All Programs, point to Microsoft Windows SDK
v6.0A, point to Tools, and then click Service Trace Viewer.
2.
In the Microsoft Service Trace Viewer, on the File menu, click Open.
3.
In the Open dialog box, go to E:\Labfiles\Starter\Logs, select both the
client_messages.svclog and service_messages.svclog files, and then click
Open.
4.
In the Activity pane, click the 000000000000 entry.
5.
In the Description column, click the first message, and then click the Message
tab.
The first message is a client request message at the service level, which
contains the parameters for the ListAvailableAppointmentTimes method call.
The second message is the equivalent transport level message on the client
which is addressed to the
http://localhost:8002/Contoso/AppointmentService endpoint.
6.
In the Description column, click the fifth message.
The fifth message is the service's response to the
ListAvailableAppointmentTimes method call and includes the available
appointment times as the return value.
The sixth message is the equivalent response message at the transport level.
7
On the File menu, click Close All.
Results: After this exercise, you should have enabled message logging for the
AppointmentService, PatientManagementService, and the ClinicAdminClient
application.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Message Logging and Activity Tracing
Module 4: Debugging and Diagnostics
Exercise 2: Enabling End-to-End Tracing for a Service
In this exercise, you will configure the AppointmentService, the
PatientManagementService, and the ClinicAdminClient to log information on
the various activities that they perform when the ConnectedWCF solution runs.
You will then analyze the trace logs by using the Microsoft Service Trace Viewer
tool.
The main tasks for this exercise are as follows:
1.
Open the existing WCFConnected solution.
2.
Enable tracing for the AppointmentService and the
PatientManagementService.
3.
Enable tracing for the ClinicAdminClient.
4.
Build and run the solution.
5.
View the trace logs.
f Task 1: Open the existing WCFConnected solution
1.
In Visual Studio 2008, on the File menu, point to Open, and then click
Project/Solution.
2.
In the Open Project dialog box, go to either of the following:
•
If you are using Visual Basic, go to the
E:\Labfiles\Starter\VB\Ex2\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
•
If you are using Visual C#, go to the
E:\Labfiles\Starter\CS\Ex2\ConnectedWCF folder, and then double-click
the ConnectedWCF.sln file.
f Task 2: Enable tracing for the AppointmentService and the
PatientManagementService
1.
In Solution Explorer, within the ServiceSelfHost project, right-click the
app.config file (for Visual Basic) or the App.config file (for Visual C#), and
then click Edit WCF Configuration.
2.
In the Microsoft Service Configuration Editor window, in the Configuration
pane, click Diagnostics.
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L4-70
3.
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In the Diagnostics pane, do the following:
•
Click Enable Log Auto Flush.
•
Click Enable Tracing.
•
Click ServiceModelTraceListener.
4.
In the Listener Settings dialog box, in the Log file box, type
E:\Labfiles\Starter\Logs\service_tracelog.svclog and then click OK.
5.
In the Configuration pane, expand Diagnostics, expand Sources, and then
click System.ServiceModel.
6.
In the Trace Source: System.ServiceModel pane, in the Trace level list, click
Information.
7.
In the Microsoft Service Configuration Editor window, on the File menu, click
Save.
8.
Close the Microsoft Service Configuration Editor window.
f Task 3: Enable tracing for the ClinicAdminClient
1.
In Solution Explorer, within the CinicAdminClient project, right-click the
app.config file (for Visual Basic) or the App.config file (for Visual C#), and
then click Edit WCF Configuration.
2.
In the Microsoft Service Configuration Editor window, in the Configuration
pane, click Diagnostics.
3.
In the Diagnostics pane, do the following:
•
Click Enable Log Auto Flush.
•
Click Enable Tracing.
•
Click ServiceModelTraceListener.
4.
In the Listener Settings dialog box, in the Log file box, type
E:\Labfiles\Starter\Logs\client_tracelog.svclog and then click OK.
5.
In the Configuration pane, expand Diagnostics, expand Sources, and then
click System.ServiceModel.
6.
In the Trace Source: System.ServiceModel pane, in the Trace level list, click
Information.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Message Logging and Activity Tracing
Module 4: Debugging and Diagnostics
7.
In the Microsoft Service Configuration Editor window, on the File menu, click
Save.
8.
Close the Microsoft Service Configuration Editor window.
f Task 4: Build and run the solution
1.
On the Build menu, click Build Solution.
2.
On the Debug menu, click Start Debugging.
3.
If the Windows Security Alert dialog box appears, click Unblock.
4.
Wait for the Console window to display the message Service running.
5,
In the Clinic Administration Client form, on the Create Appointment tab,
click Find Slots.
Ensure the Slots box is populated with a list of available appointment times.
6.
In the Patient box, type NH991199Z and then click Create. Make a note of
the appointment ID.
7.
In the Appointment Created dialog box, click OK.
8.
On the Cancel Appointment tab, in the Patient No box, type NH991199Z
and then click Get Details.
9.
The Appt ID box, type your appointment ID, and then click Delete.
10. In the Appointment Cancellation box, click OK.
11. In Microsoft Visual Studio® 2008 development system, on the Debug menu,
click Stop Debugging.
f Task 5: View the trace logs
1.
Switch to the Microsoft Service Trace Viewer.
2.
In the Microsoft Service Trace Viewer, on the File menu, click Open.
3.
In the Open dialog box, go to E:\Labfiles\Starter\Logs, select both the
client_tracelog.svclog and service_tracelog.svclog files, and then click Open.
The activity pane contains a chronological list of activities associated with
creating the AppointmentService, the PatientManagementService, and the
ClinicAdminClient, and the calling of the methods.
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4.
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In the Activity pane, click the Construct ServiceHost
'com.contoso.AppointmentService.AppointmentServiceImplementation'
activity.
This activity represents the service host building an instance of the
AppointmentService. The right pane contains the details of the activity, such
as the activity name, trace level, process name, and thread ID.
The next activity represents the similar process of building an instance of the
PatientManagementService.
5.
In the Activity pane, click the Construct ChannelFactory. Contract types:
'ClinicAdminClient.AppointmentServiceReference.AppointmentServiceCon
tract' activity.
This activity represents the building of the channel stack for the
ClinicAdminClient.
6.
In the Activity pane, click the Execute
'com.contoso.AppointmentService.AppointmentServiceContract.ListAvaila
bleAppointmentTimes' activity.
This activity represents the process of invoking the
ListAvailableAppointmentTimes method.
7.
In the Activity pane, examine some of the other activities.
8.
In the Activity pane, click the 000000000000 activity.
9.
In the left pane, click the Graph tab.
The graph view enables you to view the correlation between the different
activities.
The ServiceSelfHost column contains the activities associated with building
the AppointmentService, the PatientManagementService instances, and
starting listening for requests over the configured endpoints.
The ClinicAdminClient column contains activities associated with the
following processes:
a.
Building the channel stack for the client to communicate with the
AppointmentService
b.
Opening the client for the AppointmentServiceContract
c.
Calling the ListAvailableAppointmentTimes method in the
AppointmentService
d. Opening the client for the AppointmentServiceContract
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Message Logging and Activity Tracing
Module 4: Debugging and Diagnostics
e.
Calling the CreateAppointment method in the AppointmentService
f.
Building the channel stack for the client to communicate with the
PatientManagementService
g.
Opening the client for the PatientManagementServiceContract
h.
Calling the GetPatientDetails method in the PatientManagementService
i.
Opening the client for the AppointmentServiceContract
j.
Calling the CancelAppointment method in the AppointmentService
10. On the File menu, click Close All.
Results: After this exercise, you should have enabled tracing for the
AppointmentService, PatientManagementService, and the ClinicAdminClient
application.
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L4-74
Module 5: Designing and Defining Contracts
Lab: Contracts for Services and
Data
Logon Information:
•
Virtual Machine: 6461A-LON-DEV-05
•
User Name: Student
•
Password: Pa$$w0rd
Estimated time: 60 minutes
L5-75
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Contracts for Services and Data
Module 5: Designing and Defining Contracts
Exercise 1: Defining and implementing a one-way
operation contract
Scenario
Initial user feedback for a preliminary version of the Contoso Clinic Management
System has highlighted that it takes longer than the user would like to create an
appointment. An analysis of the appointment creation process has identified that a
significant percentage of the time is spent waiting for the system to generate the
patient letter. This needs to be speeded up to reach the desired level of system
performance.
In this exercise, you will add code to make the letter sending operation one-way
and so decouple it from the client thread of execution. This will improve the
perceived response time of the system.
The main tasks for this exercise are as follows:
1.
Start the 6461-LON-DEV-05 virtual machine and log on as Student.
2.
Add a call from the clinic admin client to the patient letter service.
3.
Add a delay and diagnostic output to the patient letter service.
4.
Verify the letter creation and notification.
5.
Change the patient letter contract to be one-way.
6.
Verify the decoupling of client and service.
f Task 1: Start the 6461-LON-DEV-06 virtual machine and log on as
Student
1.
Open the Virtual Server Remote Control Client and double-click 6461-LONDEV-05.
2.
Log on to 6461-LON-DEV-05 as Student using the password Pa$$w0rd.
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f Task 2: Add a call from the clinic admin client to the patient letter
service
1.
On the Start menu, point to All Programs, click Microsoft Visual Studio
2008, right-click Microsoft Visual Studio 2008, and then click Run as
administrator
2.
In the User Account Control dialog box, click Continue.
3.
On the File menu, point to Open, and then click Project/Solution.
•
If you are using Microsoft® Visual Basic® development system in the Open
Project dialog box, go to the folder
E:\Labfiles\Starter\VB\OneWay\ConnectedWCF and then double-click
ConnectedWCF.sln.
•
If you are using Microsoft Visual C#® development tool, in the Open
Project dialog box, go to the folder
E:\Labfiles\Starter\CS\OneWay\ConnectedWCF and then double-click
ConnectedWCF.sln.
4.
In Solution Explorer, expand the ClinicAdminClient project, right-click the
ClinicAdminForm file, and then click View Code.
5.
Locate the TODO 1 comment in the MakeAppointment method and add the
following code to create a PatientLetterServiceContractClient proxy with the
client endpoint name PLService_TCP.
[Visual C#]
// TODO 1
PatientLetterServiceContract letterProxy =
new
PatientLetterServiceContractClient("PLService_TCP");
letterProxy.SendLetter(LetterType.ConsultationBooked,
patientId,
doctorId,
slot);
[Visual Basic]
' TODO 1
Dim letterProxy As PatientLetterServiceContract = _
New PatientLetterServiceContractClient("PLService_TCP")
letterProxy.SendLetter(LetterType.ConsultationBooked, patientId, _
doctorId, slot)
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Contracts for Services and Data
Module 5: Designing and Defining Contracts
f Task 3: Add a delay and diagnostic output to the patient letter service
1.
In Solution Explorer, expand the PatientLetterService project, right-click the
PatientLetterServiceImplementation file, and then click View Code.
2.
Locate the TODO 2 comment in the SendLetter method and replace the three
lines of code in the try block with the following statements.
[Visual C#]
// TODO 2
Console.WriteLine("{0}: Entered SendLetter",
DateTime.Now.ToLongTimeString());
string template = GetLetterTemplate(type);
string letterToSend = PopulateTemplate(template,
patientId,
doctorId,
date);
SendTheLetter(letterToSend, patientId);
Thread.Sleep(5000);
Console.WriteLine("{0}: Exited SendLetter",
DateTime.Now.ToLongTimeString());
[Visual Basic]
' TODO 2
Console.WriteLine("{0}: Entered SendLetter", _
DateTime.Now.ToLongTimeString())
Dim template As String = GetLetterTemplate(type)
Dim letterToSend As String = PopulateTemplate(template, patientId,
_
doctorId,
[date])
SendTheLetter(letterToSend, patientId)
Thread.Sleep(5000)
Console.WriteLine("{0}: Exited SendLetter", _
DateTime.Now.ToLongTimeString()
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L5-79
f Task 4: Verify the letter creation and notification
1.
On the Debug menu, click Start Debugging.
2.
In the Windows Security Alert dialog box, click Unblock.
3.
Position the Contoso services console window and the Clinic Administration
Client window so that you can see both windows.
4.
In the Clinic Administration Client form, click the Create Appointment tab.
Enter the following data, and then click Create:
•
Doctor: Gastro_Jones
•
Date:
Today's date
•
Slot:
Click Find Slots (this selects the first slot shown)
•
Patient: NH991199Z
5.
Verify that both of the messages from the SendLetter method appear before
you see the Clinic Admin: Appointment Created window.
6.
In the Clinic Admin: Appointment Created window, make a note of the
appointment time, and then click OK.
7.
On the Debug menu, click Stop Debugging.
8.
On the Start menu, point to All Programs, point to Accessories, and then
click Windows Explorer.
9.
In Windows Explorer, move to the folder E:\Labfiles\letters, right-click the
file NH991199Z.txt, and then click Open to open the file in Notepad.
10. Verify that the appointment time in the letter is the one you selected.
11. Close Notepad.
f Task 5: Change the patient letter contract to be one-way
1.
Switch to Microsoft Visual Studio® 2008 development system.
2.
In Solution Explorer, expand the PatientLetterService project, right-click the
PatientLetterServiceContract file, and then click View Code.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Contracts for Services and Data
Module 5: Designing and Defining Contracts
3.
Locate the TODO 3 comment and change the OperationContract attribute of
the SendLetter operation to identify it as a one-way operation.
[Visual C#]
// TODO 3
[OperationContract(IsOneWay=true)]
void SendLetter(LetterType type, string patientId, string doctorId,
DateTime date);
[Visual Basic]
' TODO 3
_
Sub SendLetter(ByVal type As LetterType, ByVal patientId As String,
_
ByVal doctorId As String, ByVal [date] As
DateTime)
4.
In Solution Explorer, right-click the ConnectedWCF solution, and then click
Rebuild Solution.
5.
Switch to Windows Explorer, and then go to the following folder:
•
If you are using Visual Basic, go to the folder
E:\Labfiles\Starter\VB\OneWay\ConnectedWCF\ContosoServicesSelf
HostExtConfig\bin\Debug.
•
If you are using Visual C#, go to the folder
E:\Labfiles\Starter\CS\OneWay\ConnectedWCF\ContosoServicesSelf
HostExtConfig\bin\Debug.
6.
Right-click the file ContosoServicesSelfHostExtConfig.exe, and then click
Run as administrator.
7.
In the User Account Control dialog box, click Allow.
8.
In the Windows Security Alert dialog box, click Unblock.
9.
Switch to Visual Studio 2008.
10. In Solution Explorer, expand the ClinicAdminClient project, expand the
Service References folder, right-click PatientLetterServiceReference, and then
click Update Service Reference.
11. Switch to the ContosoServicesSelfHostExtConfig console window and press
ENTER to close the service host.
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f Task 6: Verify the decoupling of client and service
1.
Switch to Visual Studio 2008.
2.
On the Debug menu, click Start Debugging.
3.
Position the Contoso services console window and the Clinic Administration
Client window so that you can see both windows.
4.
In the Clinic Administration Client form, click the Create Appointment tab.
Enter the following data, and then click Create:
•
Doctor: Gastro_Jones
•
Date:
Today's date
•
Slot:
Click Find Slots (this selects the first slot shown)
•
Patient: NH991199Z
5.
Verify that the Clinic Admin Appointment Created window appears before
you see the both of the messages from the SendLetter method. This
demonstrates that the execution of the operation in the service is now
decoupled from the client.
6.
In the Clinic Admin Appointment Created window, make a note of the
appointment time, and then click OK.
7.
On the Debug menu, click Stop Debugging.
8.
Switch to Windows Explorer.
9.
In Windows Explorer, go to the folder E:\Labfiles\letters, right-click the file
NH991199Z.txt, and then click Open to open the file in Notepad.
10. Verify that the appointment time in the letter is the one you selected.
11. Close Notepad.
Results: After completing this exercise, you have seen how to turn a
request/response service operation into a one-way operation.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Contracts for Services and Data
Module 5: Designing and Defining Contracts
Exercise 2: Passing complex data with a data contract
Scenario
As part of the Clinic Administration Client application, you need to list today's
appointments including information about the patient, doctor, and time. To do
this, you need to retrieve a set of data for today's appointments. To keep the
appointment service decoupled from its underlying technology, you have decided
to pass this data as a collection of complex types that maps to the Web Service
Description Language (WDSL) service definition.
In this exercise, you will define a data contract for a .NET Framework class that
represents an appointment. You will then pass a collection of these classes back
from the appointment service to the client.
The main tasks for this exercise are as follows:
1.
Add a data contract to the Appointment class.
2.
Use the Appointment class as a return value in the appointment service
contract.
3.
Call the appointment service to list Appointments.
4.
Run the client to verify the appointment listing.
f Task 1: Add a data contract to the Appointment class
1.
Switch to Microsoft Visual Studio 2008.
2.
On the File menu, point to Open, and then click Project/Solution.
3.
•
If you are using Visual Basic, in the Open Project dialog box, go to the
folder E:\Labfiles\Starter\VB\ComplexData\ConnectedWCF, and then
double-click ConnectedWCF.sln.
•
If you are using Visual C#, in the Open Project dialog box, go to the
folder E:\Labfiles\Starter\CS\ComplexData\ConnectedWCF, and then
double-click ConnectedWCF.sln.
In Solution Explorer, expand the AppointmentService project, right-click the
Appointment file, and then click View Code.
MCT USE ONLY. STUDENT USE PROHIBITED
L5-82
4.
L5-83
Locate the TODO 4 comment, and then add the following DataContract
attribute to the Appointment class.
[Visual C#]
// TODO 4
[DataContract(Namespace =
"http://contoso.com/ClinicManagementSystem/2007/10")]
public class Appointment
[Visual Basic]
'TODO 4
_
Public Class Appointment
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Contracts for Services and Data
Module 5: Designing and Defining Contracts
5.
Add a DataMember attribute to the Id, DoctorId, PatientId, and Time
properties of the Appointment class, as shown in the following code.
[Visual C#]
[DataMember]
public string Id
{
get
{
return id;
}
set
{
id = value;
}
}
[DataMember]
public string PatientId
{
get
{
return patientId;
}
set
{
patientId = value;
}
}
[DataMember]
public string DoctorId
{
get
{
return doctorId;
}
set
{
doctorId = value;
}
}
MCT USE ONLY. STUDENT USE PROHIBITED
L5-84
(Code continued)
[DataMember]
public DateTime Time
{
get
{
return time;
}
set
{
time = value;
}
}
[Visual Basic]
_
Public Property Id() As String
Get
Return m_id
End Get
Set(ByVal value As String)
m_id = value
End Set
End Property
_
Public Property PatientId() As String
Get
Return m_patientId
End Get
Set(ByVal value As String)
m_patientId = value
End Set
End Property
_
Public Property DoctorId() As String
Get
Return m_doctorId
End Get
Set(ByVal value As String)
m_doctorId = value
End Set
End Property
L5-85
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Contracts for Services and Data
Module 5: Designing and Defining Contracts
(Code continued)
_
Public Property Time() As DateTime
Get
Return m_time
End Get
Set(ByVal value As DateTime)
m_time = value
End Set
End Property
f Task 2: Use the Appointment class as a return value in the
appointment service contract
1.
In Solution Explorer, expand the AppointmentService project, right-click the
AppointmentServiceContract file, and then click View Code.
2.
Locate the TODO 5 comment, and then add the following operation to the
AppointmentServiceContract interface.
[Visual C#]
// TODO 5
[OperationContract]
List ListTodaysAppointments();
[Visual Basic]
'TODO 5
_
Function ListTodaysAppointments() As List(Of Appointment)
3.
In Solution Explorer, right-click the AppointmentServiceImplementation file,
and then click View Code.
MCT USE ONLY. STUDENT USE PROHIBITED
L5-86
4.
L5-87
Locate the TODO 6 comment at the end of the
AppointmentServiceImplementation class. and then add the following
method.
[Visual C#]
// TODO 6
public List ListTodaysAppointments()
{
return new AppointmentHelper().ListTodaysAppointments();
}
[Visual Basic]
'TODO 6
Public Function ListTodaysAppointments() As List(Of Appointment)
Implements AppointmentServiceContract.ListTodaysAppointments
Dim helper As New AppointmentHelperClass()
Return helper.ListTodaysAppointments()
End Function
5.
In Solution Explorer, right-click the ConnectedWCF solution, and then click
Rebuild Solution.
f Task 3: Call the appointment service to list Appointments
1.
Switch to Windows Explorer, and then go to the following folder:
•
If you are using Visual Basic, go to the folder
E:\Labfiles\Starter\VB\ComplexData\ConnectedWCF\ContosoServic
esSelfHostExtConfig\bin\Debug.
•
If you are using Visual C#, go to the folder
E:\Labfiles\Starter\CS\ComplexData\ConnectedWCF\ContosoService
sSelfHostExtConfig\bin\Debug.
2.
Right-click the file ContosoServicesSelfHostExtConfig.exe, and then click
Run as administrator.
3.
In the User Account Control dialog box, click Allow.
4.
In the Windows Security Alert dialog box, click Unblock.
5.
Switch to Visual Studio 2008.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Contracts for Services and Data
Module 5: Designing and Defining Contracts
6.
In Solution Explorer, expand the ClinicAdminClient project, expand the
Service References folder, right-click AppointmentServiceReference, and
then click Update Service Reference.
7.
Switch to the ContosoServicesSelfHostExtConfig console window and press
ENTER to close the service host.
8.
Switch to Visual Studio 2008.
9.
In Solution Explorer, right-click the ClinicAdminForm file, and then click
View Code.
10. Locate the TODO 7 comment in the RefreshAppointmentList_Click method,
and then add the following code.
[Visual C#]
// TODO 7
AppointmentServiceContract proxy = GetAppointmentServiceProxy();
appointmentsToday.DataSource = proxy.ListTodaysAppointments();
[Visual Basic]
'TODO 7
Dim proxy As AppointmentServiceContract =
GetAppointmentServiceProxy()
appointmentsToday.DataSource = proxy.ListTodaysAppointments()
f Task 4: Run the client to verify the appointment listing
1.
On the Debug menu, click Start Debugging.
2.
In the Windows Security Alert dialog box, click Unblock.
3.
In the Clinic Administration Client form, click the Create Appointment tab.
Enter the following data and click Create:
•
Doctor: Gastro_Jones
•
Date:
Today's date
•
Slot:
Click Find Slots (this selects the first slot shown)
•
Patient: NH991199Z
MCT USE ONLY. STUDENT USE PROHIBITED
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L5-89
4.
In the Clinic Admin Appointment Created window, click OK.
5.
Click the Today's Appointments tab, and then click Refresh.
6.
Verify that you see at least one appointment listed with an ID, doctor ID,
patient ID, and time. If you created appointments in the previous exercise, you
should see multiple appointments.
7.
On the Debug menu, click Stop Debugging.
Results: After completing this exercise, you have defined a data contract and used
this to pass complex type data between a Windows Communication Foundation
(WCF) service and a client.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Contracts for Services and Data
Module 5: Designing and Defining Contracts
Exercise 3: Defining and implementing a callback contract
Scenario
One of the requirements of the Contoso Clinic Management System is that the
clinic administrators are informed when a consultant is ready to see their next
patient. To achieve this, you have decided to implement a callback contract
between the two client applications, the clinic admin client and the consultant
client. The clinic admin client application will receive a callback message when the
consultant client application tells the system that the consultant is ready for the
next patient.
In this exercise, you will add code to enable the clinic admin client application to
register for callbacks with the clinic management service. You will then add code to
the consultant client application to notify the clinic management service that it is
ready for the next patient and add code the clinic management service to
propagate any notifications to any registered clinic management clients.
The main tasks for this exercise are as follows:
1.
Define a callback contract.
2.
Add the callback contract to a service contract.
3.
Enable clients to register for callbacks with the service.
4.
Implement the callback contract in the clinic admin client and register with the
service.
5.
Implement the triggering method.
6.
Call the triggering method from the consultant client.
7.
Verify that callbacks are delivered to the clinic admin client.
f Task 1: Define a callback contract
1.
Switch to Microsoft Visual Studio 2008.
2.
On the File menu, point to Open, and then click Project/Solution.
•
If you are using Visual Basic, in the Open Project dialog box, go to the
folder E:\Labfiles\Starter\VB\Callback\ConnectedWCF, and then
double-click ConnectedWCF.sln.
•
If you are using Visual C#, in the Open Project dialog box, go to the
folder E:\Labfiles\Starter\CS\Callback\ConnectedWCF, and then
double-click ConnectedWCF.sln.
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L5-90
3.
In Solution Explorer, expand the ClinicManagementService project, rightclick the ClinicManagementServiceCallbackContract file, and then click
View Code.
4.
Locate the TODO 8 comment and add the following service contract.
L5-91
[Visual C#]
// TODO 8
[ServiceContract(Namespace =
"http://contoso.com/ClinicManagementSystem/2007/10")]
public interface ClinicManagementServiceCallbackContract
{
[OperationContract(IsOneWay=true)]
void NextPatientDueInToSeeConsultant(string doctorId);
}
[Visual Basic]
' TODO 8
_
Public Interface ClinicManagementServiceCallbackContract
_
Sub NextPatientDueInToSeeConsultant(ByVal doctorId As String)
End Interface
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Contracts for Services and Data
Module 5: Designing and Defining Contracts
f Task 2: Add the callback contract to a service contract
1.
In Solution Explorer, right-click the
ClinicManagementServiceEventsContract file, and then click View Code.
2.
Locate the TODO 9 comment and define a service contract as follows.
[Visual C#]
// TODO 9
[ServiceContract(Namespace =
"http://contoso.com/ClinicManagementSystem/2007/10",
CallbackContract =
typeof(com.contoso.ClinicManagementService.ClinicManagementServiceC
allbackContract))]
public interface ClinicManagementServiceEventsContract
{
[OperationContract(IsOneWay = true)]
void RegisterForEvents();
}
[Visual Basic]
'TODO 9
_
Public Interface ClinicManagementServiceEventsContract
_
Sub RegisterForEvents()
End Interface
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L5-93
f Task 3: Enable clients to register for callbacks with the service
1.
In Solution Explorer, right-click the
ClinicManagementServiceImplementation file, and then click View Code.
2.
Locate the TODO 10 comment, and then add the following code.
[Visual C#]
// TODO 10
private List eventClients
= null;
public ClinicManagementServiceImplementation()
{
eventClients = new
List();
}
[Visual Basic]
'TODO 10
Private eventClients As List( _
Of ClinicManagementServiceCallbackContract) =
Nothing
Public Sub New()
eventClients = New List( _
Of
ClinicManagementServiceCallbackContract)()
End Sub
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Contracts for Services and Data
Module 5: Designing and Defining Contracts
3.
Locate the TODO 11 comment and change the definition of the
ClinicManagementServiceImplementation class, as follows.
[Visual C#]
// TODO 11
public class ClinicManagementServiceImplementation :
ClinicManagementServiceContract,
ClinicManagementServiceEventsContract
[Visual Basic]
'TODO 11
_
Public Class ClinicManagementServiceImplementation
Implements ClinicManagementServiceContract
Implements ClinicManagementServiceEventsContract
4.
If you are using Visual Basic, press ENTER after you type the interface name to
generate the method stubs. If you are using Visual C#, right-click
ClinicManagementServiceEventsContract, point to Implement Interface,
and then click Implement Interface.
5.
If you are using Visual C#, locate the RegisterForEvents method and make the
following changes to the generated code:
•
Delete the following statements:
[Visual C#]
throw new NotImplementedException();
•
Add the following code to the RegisterForEvents method.
#region AppointmentServiceClinicEventsContract Members
public void RegisterForEvents()
{
ClinicManagementServiceCallbackContract client =
OperationContext.Current.GetCallbackChannel();
eventClients.Add(client);
}
#endregion
MCT USE ONLY. STUDENT USE PROHIBITED
L5-94
L5-95
[Visual Basic]
Public Sub RegisterForEvents() _
Implements
ClinicManagementServiceEventsContract.RegisterForEvents
Dim client As ClinicManagementServiceCallbackContract _
= OperationContext.Current.GetCallbackChannel(
_
Of
ClinicManagementServiceCallbackContract)()
eventClients.Add(client)
End Sub
6.
In Solution Explorer, right-click the Connected WCF solution, and then click
Rebuild Solution.
f Task 4: Implement the callback contract in the clinic admin client and
register with the service
1.
Switch to Windows Explorer, and then go to the following folder:
•
If you are using Visual Basic, go to the folder
E:\Labfiles\Starter\VB\Callback\ConnectedWCF\ContosoServicesSelf
HostExtConfig\bin\Debug.
•
If you are using Visual C#, go to the folder
E:\Labfiles\Starter\CS\Callback\ConnectedWCF\ContosoServicesSelf
HostExtConfig\bin\Debug.
2.
Right-click the file ContosoServicesSelfHostExtConfig.exe, and then click
Run as administrator.
3.
In the User Account Control dialog box, click Allow.
4.
In the Windows Security Alert dialog box, click Unblock.
5.
Switch to Visual Studio 2008.
6.
In Solution Explorer, expand the ClinicAdminClient project, right-click the
Service References folder, and then click Add Service Reference.
7.
In the Add Service Reference dialog box, in the Address text box, enter
net.tcp://localhost:9003/Contoso/mex, and then click Go.
8.
In the Namespace box, enter ClinicManagementServiceReference, and the
click OK.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Contracts for Services and Data
Module 5: Designing and Defining Contracts
9.
Switch to the ContosoServicesSelfHostExtConfig console window and press
ENTER to close the service host.
10. Switch to Visual Studio 2008.
11. In Solution Explorer, right-click the ClinicAdminForm file, and then click
View Code.
12. Locate the TODO 12 comment above the ClinicAdminClient namespace, and
add the following statement.
[Visual C#]
// TODO 12
using ClinicAdminClient.ClinicManagementServiceReference;
[Visual Basic]
'TODO 12
Imports ClinicAdminClient.ClinicManagementServiceReference
13. Locate the TODO 13 comment and change the definition of the
ClinicAdminForm class, as follows.
[Visual C#]
// TODO 13
public partial class ClinicAdminForm : Form,
ClinicManagementServiceEventsContractCallback
[Visual Basic]
'TODO 13
Partial Public Class ClinicAdminForm
Inherits Form
Implements ClinicManagementServiceEventsContractCallback
14. If you are using Visual Basic, press ENTER after you type the interface name to
generate the method stubs. If you are using Visual C#, right-click
ClinicManagementServiceEventsContractCallback, point to Implement
Interface, and then click Implement Interface.
15. If you are using Visual C#, locate the NextPatientDueInToSeeConsultant
method at the end of the ClinicAdminForm class, and make the following
changes to the generated code:
MCT USE ONLY. STUDENT USE PROHIBITED
L5-96
•
L5-97
Delete the following statements.
[Visual C#]
throw new NotImplementedException();
•
Add the following code to the method.
[Visual C#]
string message = String.Format("Please send in the next patient for
{0}", doctorId);
MessageBox.Show(message,
"Clinic Admin: Next Patient",
MessageBoxButtons.OK);
[Visual Basic]
Dim message As String = [String].Format( _
"Please send in the next patient for {0}",
doctorId)
MessageBox.Show(message, "Clinic Admin: Next Patient", _
MessageBoxButtons.OK)
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Contracts for Services and Data
Module 5: Designing and Defining Contracts
16. Locate the TODO 14 comment in the ClinicAdminForm constructor, and
then add the following code.
[Visual C#]
// TODO 14
InstanceContext context = new InstanceContext(this);
NetTcpBinding binding = new NetTcpBinding();
EndpointAddress address = new
EndpointAddress("net.tcp://localhost:9003/Contoso/ClinicManagementS
erviceEvents");
ClinicManagementServiceEventsContract clinicManagementServiceEvents
=
DuplexChannelFactory.CreateC
hannel(
context,
binding,
address);
bool registered = false;
for (int retryCount = 0; !registered && retryCount < 3;
retryCount++ )
{
try
{
clinicManagementServiceEvents.RegisterForEvents();
registered = true;
}
catch (Exception ex)
{
Thread.Sleep(2000);
}
}
MCT USE ONLY. STUDENT USE PROHIBITED
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L5-99
[Visual Basic]
'TODO 14
Dim context As New InstanceContext(Me)
Dim binding As New NetTcpBinding()
Dim address As New
EndpointAddress("net.tcp://localhost:9003/Contoso/ClinicManagementS
erviceEvents")
Dim clinicManagementServiceEvents As _
ClinicManagementServiceEventsContract = DuplexChannelFactory(
_
Of ClinicManagementServiceEventsContract).CreateChannel( _
context, binding,
address)
Dim registered As Boolean = False
Dim retryCount As Integer = 0
While Not registered AndAlso retryCount < 3
Try
clinicManagementServiceEvents.RegisterForEvents()
registered = True
Catch ex As Exception
Thread.Sleep(2000)
End Try
retryCount += 1
End While
f Task 5: Implement the triggering method
1.
In Solution Explorer, in the ClinicManagementService project, right-click the
ClinicManagementServiceImplementation file, and then click View Code.
2:
Locate the TODO 15 comment in the SendInNextPatient method, and then
add the following code.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Contracts for Services and Data
Module 5: Designing and Defining Contracts
[Visual C#]
// TODO 15
List problemClients =
new
List();
foreach (ClinicManagementServiceCallbackContract client in
eventClients)
{
try
{
client.NextPatientDueInToSeeConsultant(doctorId);
}
catch (CommunicationException cex)
{
problemClients.Add(client);
}
}
// Assume that the client is no longer there and remove it
foreach (ClinicManagementServiceCallbackContract client in
problemClients)
{
eventClients.Remove(client);
}
[Visual Basic]
'TODO 15
Dim problemClients As New List( _
Of ClinicManagementServiceCallbackContract)()
For Each client As ClinicManagementServiceCallbackContract _
In eventClients
Try
client.NextPatientDueInToSeeConsultant(doctorId)
Catch cex As CommunicationException
problemClients.Add(client)
End Try
Next
' Assume that the client is no longer there and remove it
For Each client As ClinicManagementServiceCallbackContract _
In problemClients
eventClients.Remove(client)
Next
MCT USE ONLY. STUDENT USE PROHIBITED
L5-100
L5-101
f Task 6: Call the triggering method from the consultant client
1.
Switch to Windows Explorer, and then go to the following folder:
•
If you are using Visual Basic, go to the folder
E:\Labfiles\Starter\VB\Callback\ConnectedWCF\ContosoServicesSelf
HostExtConfig\bin\Debug.
•
If you are using Visual C#, go to the folder
E:\Labfiles\Starter\CS\Callback\ConnectedWCF\ContosoServicesSelf
HostExtConfig\bin\Debug.
2.
Right-click the file ContosoServicesSelfHostExtConfig.exe, and then click
Run as administrator.
3.
In the User Account Control dialog box, click Allow.
4.
Switch to Visual Studio 2008.
5.
In Solution Explorer, expand the ConsultantClient project, expand the
Service References folder, right-click the ClinicManagementServiceReference
node, and then click Update Service Reference.
6.
Switch to the ContosoServicesSelfHostExtConfig console window and press
ENTER to close the service host.
7.
Switch to Visual Studio 2008.
8.
In Solution Explorer, right-click the ConsultantForm file, and then click View
Code.
9.
Locate the TODO 16 comment above the ConsultantClient namespace and
add the following statement.
[Visual C#]
// TODO 16
using ConsultantClient.ClinicManagementServiceReference;
[Visual Basic]
'TODO 16
Imports ConsultantClient.ClinicManagementServiceReference
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Contracts for Services and Data
Module 5: Designing and Defining Contracts
10. Locate the TODO 17 comment in the nextPatient_Click method and add the
following code.
[Visual C#]
// TODO 17
ClinicManagementServiceContract clinicManagementService =
new
ClinicManagementServiceContractClient();
clinicManagementService.SendInNextPatient(doctorId.Text);
[Visual Basic]
'TODO 17
Dim clinicManagementService As ClinicManagementServiceContract = _
New
ClinicManagementServiceContractClient()
clinicManagementService.SendInNextPatient(doctorId.Text)
f Task 7: Verify that callbacks are delivered to the clinic admin client
1.
On the Debug menu, click Start Without Debugging.
2.
In Solution Explorer, right-click ClinicAdminClient, point to Debug, and then
click Start new instance.
3.
Repeat step 2 to start a second instance of the ClinicAdminClient application.
4.
In Solution Explorer, right-click ConsultantClient, point to Debug, and then
click Start new instance.
5.
In Consultant Client window, click the Appointment Admin tab, select
Gastro_Jones in the My ID list box, and then click Next Patient.
Verify that two message boxes appear, one for each clinic administration client,
that inform you that doctor Gastro_Jones is ready for the next patient. Click
OK to close each message box. This demonstrates that the call to the operation
is now decoupled from the client.
MCT USE ONLY. STUDENT USE PROHIBITED
L5-102
L5-103
6.
Close one of the Clinic Administration Client windows.
7.
In the Consultant Client window, click the Appointment Admin tab, select
ENT_Davies in the My ID list box, and then click Next Patient.
Verify that only one message box appears that informs you that doctor
ENT_Davies is ready for the next patient. Click OK to close the message box.
8.
On the Debug menu, click Stop Debugging.
Results: After completing this exercise, you have defined a callback contract and
used this to communicate an event between two different service clients.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Contracts for Services and Data
Module 6: Handling Errors
Lab: Handling Errors
Exercise 1: Title
Logon Information:
•
Virtual Machine: 6461A-LON-DEV-06
•
User Name: Student
•
Password: Pa$$w0rd
Estimated time: 40 minutes
L6-105
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Handling Errors
Module 6: Handling Errors
Exercise 1: Handle Unexpected Errors in a WCF Service
Scenario
As the project moves into the prototyping stage, you need to define and implement
a consistent error handling policy for your services and the applications that use
them. It is difficult to predict all errors that might occur in your services, so the first
thing to do is to handle any errors that the service might generate.
In this exercise, you will add code to catch errors in the client application and
change the service behavior to pass more information about the errors to the client.
The main tasks for this exercise are as follows:
1.
Start the 6461-LON-DEV-06 virtual machine and log on as Student.
2.
Confirm that the clinic admin client runs without errors.
3.
Force an unexpected error in the service and examine the effects.
4.
Add an outer try block to the client and report the exception to the user.
5.
Pass exception detail from service to client.
f Task 1: Start the 6461-LON-DEV-06 virtual machine and log on as
Student
1.
Open the Virtual Server Remote Control Client and double-click 6461-LONDEV-06.
2.
Log on to 6461-LON-DEV-06 as Student using the password Pa$$w0rd.
f Task 2: Confirm that the clinic admin client runs without errors
1.
On the taskbar, click Start, point to All Programs, point to Microsoft Visual
Studio 2008, right-click Microsoft Visual Studio 2008, and then click Run as
administrator.
2.
In the User Account Control dialog box, click Continue.
MCT USE ONLY. STUDENT USE PROHIBITED
L6-106
3.
L6-107
On the File menu, point to Open, and then click Project/Solution.
•
If you are using Microsoft® Visual Basic® development system, in the
Open Project dialog box, go to the folder
E:\Labfiles\Starter\VB\UnexpectedErrors\ConnectedWCF, and then
double-click ConnectedWCF.sln.
•
If you are using Microsoft Visual C#® development tool, in the Open
Project dialog box, go to the folder
E:\Labfiles\Starter\CS\UnexpectedErrors\ConnectedWCF, and then
double-click ConnectedWCF.sln.
4.
On the Debug menu, click Start Debugging.
5.
In the Windows Security Alert dialog box, click Unblock.
6.
In the Clinic Administration Client form, click the Create Appointment tab.
Enter the following data, and then click Create:
•
Doctor: Gastro_Jones
•
Date: Today’s date
•
Slot: Click Find Slots (this selects the first slot shown)
•
Patient: NH991199Z
7.
In the Clinic Admin Appointment Created window, click OK.
8.
Click the Today’s Appointments tab, and then click Refresh.
On this tab, you should see the appointment you have just added. You will use
this listing function as the basis of the rest of the exercises.
9.
On the Debug menu, click Stop Debugging.
f Task 3: Force an unexpected error in the service and examine the
effects
1.
In Solution Explorer, expand the AppointmentService project, right-click the
AppointmentHelper file, and then click View Code.
2.
Locate the TODO 1 comment in the GetConnection method and change the
connection string passed into the SqlConnection constructor as follows:
•
Data Source: .\\Dummy
•
Connection Timeout: 5
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Handling Errors
Module 6: Handling Errors
[Visual Basic]
' TODO 1
Return New SqlConnection("Data Source=.\Dummy;" & _
"Initial Catalog=Appointments;"& _
"Integrated Security=SSPI;" & _
"Connection Timeout=5")
[Visual C#]
// TODO 1
return new SqlConnection("Data Source=.\\Dummy;" +
"Initial Catalog=Appointments;" +
"Integrated Security=SSPI;" +
"Connection Timeout=5");
3.
On the Debug menu, click Start Debugging.
4.
In the Clinic Administration Client form, click the Today’s Appointments tab,
and then click Refresh.
After 5 seconds, you will see the Visual Studio Exception dialog box appear in
the service-side code (AppointmentHelper) with the title "SQLException was
unhandled by user code". This is the original exception inside the service
caused by setting the invalid SQL data source value in the connection string.
5.
On the Debug menu, click Continue.
You will now see the Visual Studio Exception dialog box appear in the clientside code (ClinicAdminForm) with the title "FaultException was unhandled".
Note: If you leave it too long between the service-side exception appearing and
continuing to debug, you might see a dialog box titles "TimeoutException was
unhandled". In this case, restart the debugging session and perform the preceding
above more rapidly.
6.
On the Debug menu, click Stop Debugging.
MCT USE ONLY. STUDENT USE PROHIBITED
L6-108
L6-109
f Task 4: Add an outer try block to the client and report the exception
to the user
1.
In Solution Explorer, expand the ClinicAdminClient project, right-click the
ClinicAdminForm file, and then click View Code.
2.
Locate the TODO 2 comment in the RefreshAppointmentList_Click method,
and then change the code in this method, as shown here.
[Visual Basic]
' TODO 2
Try
Dim proxy As AppointmentServiceContract = _
GetAppointmentServiceProxy()
appointmentsToday.DataSource = proxy.ListTodaysAppointments()
Catch unknown As Exception
MessageBox.Show(unknown.Message, _
"Clinic Admin: Error", _
MessageBoxButtons.OK)
End Try
[Visual C#]
// TODO 2
try
{
AppointmentServiceContract proxy =
GetAppointmentServiceProxy();
appointmentsToday.DataSource = proxy.ListTodaysAppointments();
}
catch (Exception unknown)
{
MessageBox.Show(unknown.Message,
"Clinic Admin: Error",
MessageBoxButtons.OK);
}
3.
On the Debug menu, click Exceptions.
4.
In the Exceptions dialog box, clear the User-unhandled check box for
Common Language Runtime Exceptions, and then click OK.
5.
On the Debug menu, click Start Debugging.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Handling Errors
Module 6: Handling Errors
6.
In the Clinic Administration Client form, click the Today’s Appointments tab,
and then click Refresh.
After 5 seconds, you will see the Clinic Admin: Error message box. Verify that
it displays the following message, and then click OK:
"The server was unable to process the request due to an internal error. For
more information about the error, either turn on
IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from
the configuration behavior) on the server in order to send the
exception information back to the client, or turn on tracing as per the
Microsoft .NET Framework 3.0 SDK documentation and inspect the server
trace logs."
7.
On the Debug menu, click Stop Debugging.
f Task 5: Pass exception detail from service to client
1.
In Solution Explorer, expand the ContosoServicesSelfHostExtConfig project,
right-click app.config, and then click Edit WCF Configuration.
2.
In the Configuration pane, expand the Advanced folder, expand the Service
Behaviors folder, and then click the AppointmentServiceBehavior node.
3.
In the Behavior: AppointmentServiceBehavior pane, click Add.
4.
In the Adding Behavior Element Extension Sections dialog box, click
serviceDebug and then click Add.
5.
In the Configuration pane, expand the AppointmentServiceBehavior behavior
node, and then click serviceDebug.
6.
In the serviceDebug pane on the right side, set the value of the
IncludeExceptionDetailInFaults property to True.
7.
In the Windows Communication Foundation (WCF) Service Configuration
Editor window, on the File menu, click Save.
8.
Close the WCF Service Configuration Editor window.
9.
On the Debug menu, click Start Debugging.
MCT USE ONLY. STUDENT USE PROHIBITED
L6-110
L6-111
10. In the Clinic Administration Client form, click the Today's Appointments tab,
and then click Refresh.
After 5 seconds, you will see the Clinic Admin: Error message box. Verify that
it displays the following message, and then click OK:
"An error has occurred while establishing a connection to the server. When
connecting to SQL Server 2005, this failure may be caused by the fact that
under the default settings SQL Server does not allow remote connections.
(provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance
Specified)"
11. On the Debug menu, click Stop Debugging.
12. Close Microsoft Visual Studio® 2008 development system.
Results: After completing this exercise, you have seen how to handle service
exceptions on the client and how to pass more detail from service to client.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Handling Errors
Module 6: Handling Errors
Exercise 2: Add Fault Handling to a WCF Service and the
Service Contract
Scenario
When you define and implement a consistent error handling policy for your
services, you should specify which errors your services generate and under what
conditions they generate these errors. These error definitions form part of the
contract between the services and the applications that use them.
In this exercise, you will add code to catch errors on the client and change the
service behavior to pass more information about the errors to the client.
The main tasks for this exercise are as follows:
1.
Define a fault contract.
2.
Adjust the service contract and run-time behavior so that the fault is the only
mechanism for passing error information to the client.
3.
Catch and handle the exception on the server side.
4.
Adjust the client code to work with the service fault.
f Task 1: Define a fault contract
1.
On the taskbar, click Start, point to All Programs, point to Microsoft Visual
Studio 2008, right-click Microsoft Visual Studio 2008, and then click Run as
administrator.
2.
In the User Account Control dialog box, click Continue.
3.
On the File menu, point to Open, and then click Project/Solution.
•
If you are using Visual Basic, in the Open Project dialog box, go to the
folder E:\Labfiles\Starter\VB\ServiceErrors\ConnectedWCF, and then
double-click ConnectedWCF.sln.
•
If you are using Visual C#, in the Open Project dialog box, go to the
folder E:\Labfiles\Starter\CS\ServiceErrors\ConnectedWCF, and then
double-click ConnectedWCF.sln.
4.
In Solution Explorer, right-click the AppointmentService project, point to
Add, and then click New Item.
5.
In the Add New Item - AppointmentService dialog box, in the Templates
pane, click Class, set the Name to UnexpectedServiceFault, and then click
Add.
MCT USE ONLY. STUDENT USE PROHIBITED
L6-112
6.
In Solution Explorer, expand the AppointmentService project, right-click
UnexpectedServiceFault, and then click View Code.
7.
Make the following changes to the generated code:
•
L6-113
If you are using Visual C#, delete the following statements.
[Visual C#]
using System.Collections.Generic;
using System.Linq;
using System.Text;
•
Add a statement to bring the namespace System.Runtime.Serialization
into scope.
•
If you are using Visual C#, set the namespace containing the class to be
com.contoso.
Your code should now look like the following.
[Visual Basic]
Imports System.Runtime.Serialization
Class UnexpectedServiceFault
End Class
[Visual C#]
using System;
using System.Runtime.Serialization;
namespace com.contoso
{
class UnexpectedServiceFault
{
}
}
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Handling Errors
Module 6: Handling Errors
8.
Modify the definition of the UnexpectedServiceFault class as follows.
[Visual Basic]
_
Public Class UnexpectedServiceFault
End Class
[Visual C#]
[DataContract(Namespace="http://contoso.com/ClinicManagementSystem/
2007/10")]
public class UnexpectedServiceFault
{
}
9.
Add the following code to the UnexpectedServiceFault class.
[Visual Basic]
Private _endUserMessage As String = "UNDEFINED"
_
Public Property EndUserMessage() As String
Get
Return _endUserMessage
End Get
Set
_endUserMessage = value
End Set
End Property
Private _errorCode As Integer = -1
_
Public Property ErrorCode() As Integer
Get
Return _errorCode
End Get
Set
_errorCode = value
End Set
End Property
MCT USE ONLY. STUDENT USE PROHIBITED
L6-114
L6-115
[Visual C#]
private string _endUserMessage = "UNDEFINED";
[DataMember]
public string EndUserMessage
{
get
{
return _endUserMessage;
}
set
{
_endUserMessage = value;
}
}
private int _errorCode = -1;
[DataMember]
public int ErrorCode
{
get
{
return _errorCode;
}
set
{
_errorCode = value;
}
}
f Task 2: Adjust the service contract and run-time behavior so that the
fault is the only mechanism for passing error information to the client
1.
In Solution Explorer, expand the AppointmentService project, right-click the
AppointmentServiceContract file, and then click View Code.
2.
Locate the TODO 3 comment above the ListTodaysAppointments method
and add the following FaultContract to the method.
[Visual Basic]
' TODO 3
_
_
Function ListTodaysAppointments() As List(Of Appointment)
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Handling Errors
Module 6: Handling Errors
[Visual C#]
// TODO 3
[OperationContract]
[FaultContract(typeof(com.contoso.UnexpectedServiceFault))]
List ListTodaysAppointments();
3.
In Solution Explorer, expand the ContosoServicesSelfHostExtConfig project,
right-click app.config, and then click Edit WCF Configuration.
4.
In the Configuration pane, expand the Advanced folder, expand the Service
Behaviors folder, expand the AppointmentServiceBehavior node, and then
click serviceDebug.
5.
In the serviceDebug pane on the right side, set the value of the
IncludeExceptionDetailInFaults property to False.
6.
In the WCF Service Configuration Editor window, on the File menu, click
Save.
7.
Close the WCF Service Configuration Editor window.
f Task 3: Catch and handle the exception on the server side
1.
In Solution Explorer, in the AppointmentService project, right-click the
AppointmentServiceImplementation file, and then click View Code.
2.
Locate the TODO 4 comment in the ListTodaysAppointments method and
surround the call to AppointmentHelper.ListTodaysAppointments with a
Try/Catch block (for Visual Basic) or a try/catch block (for Visual C#) that
will catch any form of Exception, as shown in the following code.
[Visual Basic]
' TODO 4
Try
Return New AppointmentHelper().ListTodaysAppointments()
Catch unexpected As Exception
End Try
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L6-116
L6-117
[Visual C#]
// TODO 4
try
{
return new AppointmentHelper().ListTodaysAppointments();
}
catch (Exception unexpected)
{
}
3.
In the catch block, add the following code.
[Visual Basic]
Catch unexpected As Exception
LogException(unexpected, "ListTodaysAppointments")
Dim fault As New UnexpectedServiceFault()
fault.EndUserMessage = "There was an unexpected error " & _
"on the server. You may be able to " & _
"try this operation again." & _
" If it still does not work then " & _
"please contact your support
department."
fault.ErrorCode = 101
Throw New FaultException(Of UnexpectedServiceFault)(fault, _
"An unexpected error occurred inside the service.")
End Try
[Visual C#]
catch (Exception unexpected)
{
LogException(unexpected, "ListTodaysAppointments");
UnexpectedServiceFault fault = new UnexpectedServiceFault();
fault.EndUserMessage = "There was an unexpected error " +
"on the server. You may be able to " +
"try this operation again." +
" If it still does not work then " +
"please contact your support
department.";
fault.ErrorCode = 101;
throw new FaultException(fault,
"An unexpected error occurred inside the service.");
}
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Handling Errors
Module 6: Handling Errors
4.
In Solution Explorer, right-click the ConnectedWCF solution, and then click
Rebuild Solution.
f Task 4: Adjust the client code to work with the service fault
1.
On the taskbar, click Start, point to All Programs, point to Accessories, and
then click Windows Explorer.
2.
In Windows Explorer, go to the following folder:
•
If you are using Visual Basic, go to
E:\Labfiles\Starter\VB\ServiceErrors\ConnectedWCF\ContosoService
sSelfHostExtConfig\bin\Debug
•
If you are using Visual C#, go to
E:\Labfiles\Starter\CS\ServiceErrors\ConnectedWCF\ContosoService
sSelfHostExtConfig\bin\Debug
3.
Right-click the file ContosoServicesSelfHostExtConfig.exe, and then click
Run as Administrator.
4.
In the User Account Control dialog box, click Allow.
5.
In the Windows Security Alert dialog box, click Unblock.
6.
Switch to Visual Studio 2008. In Solution Explorer, expand the
ClinicAdminClient project, expand the Service References folder, right-click
AppointmentServiceReference, and then click Update Service Reference.
7.
Switch to the ContosoServicesSelfHostExtConfig console window and press
ENTER to close the service host.
8.
Switch to Visual Studio 2008. In Solution Explorer, in the ClinicAdminClient
project, right-click the ClinicAdminForm file, and then click View Code.
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L6-118
9.
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Locate the TODO 2 comment in the RefreshAppointmentList_Click method
and change the Try/Catch block (for Visual Basic) or a try/catch block (for
Visual C#) as shown in the following code.
[Visual Basic]
' TODO 2
Try
Dim proxy As AppointmentServiceContract = _
GetAppointmentServiceProxy()
appointmentsToday.DataSource = proxy.ListTodaysAppointments()
Catch ex As FaultException(Of UnexpectedServiceFault)
MessageBox.Show(ex.Detail.EndUserMessage, _
"Clinic Admin: Error", _
MessageBoxButtons.OK)
End Try
[Visual C#]
// TODO 2
try
{
AppointmentServiceContract proxy =
GetAppointmentServiceProxy();
appointmentsToday.DataSource = proxy.ListTodaysAppointments();
}
catch (FaultException ex)
{
MessageBox.Show(ex.Detail.EndUserMessage,
"Clinic Admin: Error",
MessageBoxButtons.OK);
}
10. On the Debug menu, click Start Without Debugging.
11. In the Windows Security Alert dialog box, click Unblock.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Handling Errors
Module 6: Handling Errors
12. In the Clinic Administration Client form, click the Today’s Appointments tab,
and then click Refresh.
After 5 seconds, you will see the Clinic Admin: Error message box. Verify that
it displays the following message:
"There was an unexpected error on the server. You may be able to try this
operation again. If it still does not work then please contact your support
department"
13. Close Visual Studio 2008.
Results: After completing this exercise, you have defined a fault contract and used
this to pass error detail between a WCF service and a client.
MCT USE ONLY. STUDENT USE PROHIBITED
L6-120
Module 7: Improving WCF Service Quality
Lab: Improving Service Quality
Logon Information:
•
Virtual Machine: 6461A-LON-DEV-07
•
User Name: Student
•
Password: Pa$$w0rd
Estimated time: 80 minutes
L7-121
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Improving Service Quality
Module 7: Improving WCF Service Quality
Exercise 1: Managing WCF Service Instances
Scenario
You must determine the best instance management and threading approach for the
Contoso Clinic Management System. Opinion is divided on whether to have a
single service instance or multiple instances. You have been asked to demonstrate
some of the issues to the development manager and some of the more technically
aware stakeholders. To do this, you need to show how problems such as lost or
corrupt data might occur if the wrong option is selected.
In this exercise, you will replace the appointment service implementation with one
that stores appointments on a linked list. You will then set the state management
style so that multiple clients can "see" the appointments and then load the service
until it clearly demonstrates concurrency issues.
The main tasks for this exercise are as follows:
1.
Start the 6461-LON-DEV-07 virtual machine and log on as Student.
2.
Replace the appointment service implementation with one based on an inmemory linked list.
3.
Set the instance context mode to share the appointment data between clients.
f Task 1: Start the 6461-LON-DEV-07 virtual machine and log on as
Student
1.
Open the Virtual Server Remote Control Client and double-click 6461-LONDEV-07.
2.
Log on to 6461-LON-DEV-07 as Student using the password Pa$$w0rd.
f Task 2: Replace the appointment service implementation with one
based on an in-memory linked list
1.
On the Start menu, point to All Programs, point to Microsoft Visual Studio
2008, right-click Microsoft Visual Studio 2008, and then click Run as
administrator.
2.
In the User Account Control dialog box, click Continue.
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L7-122
3.
4.
5.
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On the File menu, point to Open, and then click Project/Solution:
•
If you are using Microsoft® Visual Basic® development system, in the
Open Project dialog box, go to the folder
E:\Labfiles\Starter\VB\InstanceManagement\ConnectedWCF, and
then double-click ConnectedWCF.sln.
•
If you are using Microsoft Visual C#® development tool, in the Open
Project dialog box, go to the folder
E:\Labfiles\Starter\CS\InstanceManagement\ConnectedWCF, and
then double-click ConnectedWCF.sln.
In Solution Explorer, expand the AppointmentService project, right-click the
AppointmentServiceLinkedListImplementation file, and then click View
Code. Examine the code in this file to see how:
•
The constructor creates an instance of the LinkedListAppointmentHelper
class.
•
The CreateAppointment and ListTodaysAppointments methods
delegate their functionality to the LinkedListAppointmentHelper
instance.
In Solution Explorer, right-click the LinkedListAppointmentHelper file, and
then click View Code. Examine the code in this file to see how:
•
The CreateAppointment method wraps the Appointment passed in as
the parameter in a linked-list wrapper, steps through the linked list to find
the end, and appends the wrapped appointment to the list.
•
The ListTodaysAppointments method walks through the linked list and
places any appointments that occur today into a List that
it returns.
6.
In Solution Explorer, expand the ContosoServicesSelfHostExtConfig project,
right-click the ContosoServicesHost file, and then click View Code.
7.
In the View Code window, locate the TODO 1 comment in the Main method.
Change the service instance type for the appointment service to
com.contoso.AppointmentService.AppointmentServiceLinkedList
Implementation.
[Visual Basic]
' TODO 1
Dim appointmentInstanceType As Type = _
GetType(com.contoso.AppointmentService. _
AppointmentServiceLinkedListImplementation)
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Improving Service Quality
Module 7: Improving WCF Service Quality
[Visual C#]
// TODO 1
Type appointmentInstanceType =
typeof(com.contoso.AppointmentService.
AppointmentServiceLinkedListImplementation);
8.
In Solution Explorer, right-click app.config, and then click Edit WCF
Configuration.
9.
Expand the Services folder, and then click
com.contoso.AppointmentService.AppointmentServiceImplementation. In
the right pane, set the Name value to
com.contoso.AppointmentService.AppointmentServiceLinkedList
Implementation.
10. In the WCF Service Configuration Editor window, on the File menu, click
Save.
11. Close the WCF Service Configuration Editor window.
12. In Solution Explorer, right-click Solution 'Connected WCF', and then click
Rebuild Solution.
13. On the Debug menu, click Start Debugging.
14. In the Windows Security Alert dialog box, click Unblock.
15. In the Clinic Administration Client form, click the Create Appointment tab.
16. Click Find Slots, and then verify that a list of available slots is displayed. This
confirms that the linked list form of the appointment service is running
correctly.
17. On the Debug menu, click Stop Debugging.
MCT USE ONLY. STUDENT USE PROHIBITED
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L7-125
f Task 3: Set the instance management style to share the appointment
data between clients
1.
In Solution Explorer, expand the HighSpeedAppointmentMaker project,
right-click the HighSpeedMainForm file, and then click View Code. This form
starts multiple client threads, each of which makes calls to the appointment
service.
Examine the AddAppointments method that each thread calls. This method
creates a proxy for the appointment service and then calls the
CreateAppointment operation 20 times. This method reports its progress by
asking the appointment service for a list of the current appointments and
displaying the number of appointments currently reported by the service,
together with the number of appointments this thread has added so far.
If you run this application with 4 threads, you would expect 80 (4 x 20)
appointments to be made on the service.
2.
In Solution Explorer, right-click the ConnectedWCF solution, and then click
Set Startup Projects.
3.
In the Solution 'ConnectedWCF' Property Pages dialog box, click Multiple
startup projects.
4.
In the Multiple startup projects list, set the Action for the
ContosoServicesSelfHostExtConfig and HighSpeedAppointmentMaker
projects to Start. Set the Action for the remaining projects to None.
5.
In the Solution 'ConnectedWCF' Property Pages dialog box, click OK.
6.
On the Debug menu, click Start Debugging.
7.
In the High Speed Appointment Maker window, increase the number of
client threads to 4, and then click Go.
Each row shows the results from one thread. Verify that each thread reports
that it has added 20 appointments but that the number that the service reports
in each case is only 20. At least one of the values reported by the service
should be 80 because that would be the last value reported by the service if it
had received all 80 appointment requests. The problem is that the default
instance management mode is PerSession, so each client thread gets its own
instance of the appointment service and cannot see the appointments made by
the other client threads.
8.
On the Debug menu, click Stop Debugging.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Improving Service Quality
Module 7: Improving WCF Service Quality
9.
In Solution Explorer, expand the AppointmentService project, right-click the
AppointmentServiceLinkedListImplementation file, and then click View
Code.
10. Locate the TODO 2 comment above the
AppointmentServiceLinkedListImplementation class definition, and then
add a ServiceBehaviorAttribute with its InstanceContextMode property set
to InstanceContextMode.Single. All client threads will now interact with the
same instance of the appointment service.
[Visual Basic]
' TODO 2
_
Public Class AppointmentServiceLinkedListImplementation
Implements AppointmentServiceContract
...
[Visual C#]
// TODO 2
[ServiceBehavior(InstanceContextMode=InstanceContextMode.Single)]
public class AppointmentServiceLinkedListImplementation :
AppointmentServiceContract
...
11. On the Debug menu, click Start Debugging.
12. In the High Speed Appointment Maker window, increase the number of
client threads to 4, and then click Go.
Verify that the service reports that it has received 80 appointment requests (at
least one of the lines should report 80 appointments).
13. On the Debug menu, click Stop Debugging.
14. Close Visual Studio 2008.
Results: After completing this exercise, you have seen how to change the instance
management mode on your service and what effect this has.
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L7-127
Exercise 2: Managing Concurrency Issues
Scenario
You have been asked to demonstrate the problems that might occur from longerrunning methods and resource contention. To do this, you need to show how
corruption might occur if the wrong combination of threading and instance
management is selected.
In this exercise, you will intentionally create a threading problem in the linked-list
version of the appointment service implementation. You will then modify the
threading mode so that multiple clients can access the service without corruption.
The main tasks for this exercise are as follows:
1.
Demonstrate that the service defaults to a safe threading mode.
2.
Show that attempts to speed up the service can lead to corruption due to
multi-threading.
f Task 1: Demonstrate that the service defaults to a safe threading
mode
1.
On the Start menu, point to All Programs, point to Microsoft Visual Studio
2008, right-click Microsoft Visual Studio 2008, and then click Run as
administrator.
2.
In the User Account Control dialog box, click Continue.
3.
On the File menu, point to Open and then click Project/Solution:
4.
•
If you are using Visual Basic, in the Open Project dialog box, go to the
folder E:\Labfiles\Starter\VB\Concurrency\ConnectedWCF, and then
double-click ConnectedWCF.sln.
•
If you are using Visual C#, in the Open Project dialog box, go to the
folder E:\Labfiles\Starter\CS\Concurrency\ConnectedWCF, and then
double-click ConnectedWCF.sln.
In Solution Explorer, expand the AppointmentService project, right-click the
LinkedListAppointmentHelper file, and then click View Code.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Improving Service Quality
Module 7: Improving WCF Service Quality
5.
Locate the TODO 3 comment in the CreateAppointment method, and then
add the following code.
[Visual Basic]
' TODO 3
Console.WriteLine([String].Format("{0}: called with {1} & {2}" & _
", id is {3} : about to sleep", _
DateTime.Now.ToLongTimeString(), _
appointment.DoctorId, _
appointment.PatientId, _
appointment.Id))
Thread.Sleep(500)
Console.WriteLine([String].Format("{0}: woken up", _
DateTime.Now.ToLongTimeString()))
[Visual C#]
// TODO 3
Console.WriteLine(String.Format("{0}: called with {1} & {2}" +
", id is {3} : about to sleep",
DateTime.Now.ToLongTimeString(),
appointment.DoctorId,
appointment.PatientId,
appointment.Id));
Thread.Sleep(500);
Console.WriteLine(String.Format("{0}: woken up",
DateTime.Now.ToLongTimeString()));
The call to Sleep should allow any other thread running in the service to
obtain a duplicate place in the linked list and so the service should gradually
"lose" appointments.
6.
On the Debug menu, click Start Debugging.
7.
In the Windows Security Alert dialog box, click Unblock.
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L7-128
8.
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In the High Speed Appointment Maker window, increase the number of
client threads to 4, and then click Go.
Verify that each thread reports that it has added 20 appointments and that at
least one of the values reported by the service is 80. Because the instance life
cycle management value is Single, you might expect that the Sleep call you
added would cause corruption as described in step 5.
The reason that there is no corruption is because the default threading mode is
Single; this prevents any other calling thread from accessing the service
instance even while an earlier caller is sleeping in the service. However, the
price you pay for this safety is in terms of potential performance.
9.
On the Debug menu, click Stop Debugging.
f Task 2: Show that attempts to speed up the service can lead to
corruption due to multi-threading
1.
In Solution Explorer, expand the AppointmentService project, right-click the
AppointmentServiceLinkedListImplementation file, and then click View
Code.
2.
Locate the TODO 2 comment above the
AppointmentServiceLinkedListImplementation class definition, and then
amend the ServiceBehaviorAttribute, as shown in the following code.
[Visual Basic]
' TODO 2
_
Public Class AppointmentServiceLinkedListImplementation
Implements AppointmentServiceContract
...
[Visual C#]
// TODO 2
[ServiceBehavior(InstanceContextMode=InstanceContextMode.Single,
ConcurrencyMode=ConcurrencyMode.Multiple)]
public class AppointmentServiceLinkedListImplementation :
AppointmentServiceContract
...
3.
On the Debug menu, click Start Debugging.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Improving Service Quality
Module 7: Improving WCF Service Quality
4.
In the High Speed Appointment Maker window, increase the number of
client threads to 4, and then click Go.
Verify that each thread reports that it has added 20 appointments but that the
values reported by the service are well below 80. As you can see, in an effort to
improve performance, this has opened up potential for corruption due to
resource contention (in this case, the resource is the linked list).
5.
On the Debug menu, click Stop Debugging.
6.
Close Visual Studio 2008.
Results: After completing this exercise, you have seen how to control the threading
mode of a service.
MCT USE ONLY. STUDENT USE PROHIBITED
L7-130
L7-131
Exercise 3: Throttling Access to a WCF Service
Scenario
The level of load placed on the Contoso Clinic Management System will vary over
time as more family practitioners sign up to the service. Also, the level of load from
the family practitioners will be unpredictable over the course of a week. However,
one thing is for certain: when a patient stands at the administrator's desk in the
practice waiting for their appointment, they will not appreciate the system running
slowly. Because you will probably initially deploy the system on a limited amount
of hardware, you must explore how effective throttling the number of clients will
be in terms of maintaining service performance.
In this exercise, you will investigate how the service throttling setting affects the
response time for successful callers and its overall impact on response times and
throughput.
The main tasks for this exercise are as follows:
1.
Take an initial measure of the response times.
2.
Determine the effect of throttling on overall response times.
3.
Determine the effect of throttling on successful caller response times.
f Task 1: Take an initial measure of the response times
1.
On the Start menu, point to All Programs, point to Microsoft Visual Studio
2008, right-click Microsoft Visual Studio 2008, and then click Run as
administrator.
2.
In the User Account Control dialog box, click Continue.
3.
On the File menu, point to Open, and then click Project/Solution.
4.
•
If you are using Visual Basic, in the Open Project dialog box, go to the
folder E:\Labfiles\Starter\VB\Throttling\ConnectedWCF, and then
double-click ConnectedWCF.sln.
•
If you are using Visual C#, in the Open Project dialog box, go to the
folder E:\Labfiles\Starter\CS\Throttling\ConnectedWCF, and then
double-click ConnectedWCF.sln.
In Solution Explorer, expand the HighSpeedAppointmentMaker project,
right-click the HighSpeedMainForm file, and then click View Code. This
version of the application times the duration of the calls made by each client
thread and provides you with an overall average.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Improving Service Quality
Module 7: Improving WCF Service Quality
5.
Locate the TODO 4 comment in the AddAppointments method, and then
examine the code below it. This code takes a timestamp before the calls to the
CreateAppointment and ListTodaysAppointments operations, and then it
uses this information to calculate an average timing across the 20 pairs of calls.
Note: Because these timings are taken on the client side, they will include any
waiting time encountered by the call, such as if it is blocked waiting for a service
instance.
6.
On the Debug menu, click Start Debugging.
7.
In the Windows Security Alert dialog box, click Unblock.
8.
In the High Speed Appointment Maker window, increase the number of
client threads to 10, and then click Go.
After all the threads finish, make a note of the average value for the call
duration across the 10 threads reported in the dialog box, and then click OK.
9.
On the Debug menu, click Stop Debugging.
f Task 2: Determine the effect of throttling on overall response times
1.
In Solution Explorer, expand the ContosoServicesSelfHostExtConfig project,
right-click app.config, and then click Edit WCF Configuration.
2.
Expand the Advanced folder, expand the Service Behaviors folder, and then
click the HttpMexAndExceptionDetail behavior. In the right pane, click Add.
3.
In the Adding Behavior Element Extension Sections dialog box, select
serviceThrottling, and then click Add.
4.
In the Configuration pane, expand the HttpMexAndExceptionDetail behavior
node, and then click serviceThrottling.
5.
In the serviceThrottling pane, set the value of MaxConcurrentCalls property
to 3.
6.
In the WCF Service Configuration Editor window, on the File menu, click
Save.
7.
Close the WCF Service Configuration Editor window.
8.
On the Debug menu, click Start Debugging.
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L7-132
9.
L7-133
In the High Speed Appointment Maker window, increase the number of
client threads to 10, and then click Go.
After all the threads finish running, you will see a dialog box that contains an
average value for the call duration across the 10 threads. Make a note of this
value, and then click OK.
Verify that this value is more than that reported earlier.
You should find that setting a throttling value of less than the number of
calling threads has increased the average time taken per-call when measured
from the client side. This is because calling threads are now having to block
waiting for another calling thread to leave a service instance so that the
number of concurrent calls drops below 3.
10. On the Debug menu, click Stop Debugging.
f Task 3: Determine the effect of throttling on successful caller response
times
1.
In Solution Explorer, expand the HighSpeedAppointmentMaker project,
right-click the HighSpeedMainForm file, and then click View Code.
2.
Locate the TODO 4 comment in the AddAppointments method, and then
perform the following steps:
•
Delete the statement that creates the startTimestamp variable.
•
Delete the statement that calls the CreateAppointment method.
•
Delete the statement that calls the ListTodaysAppointments method.
•
Delete the statement that creates the endTimestamp variable.
•
Delete the statement that creates the millisThisCall variable.
Add the following code:
[Visual Basic]
' TODO 4
Dim callTime As TimeSpan = _
appointmentService.TimedCreateAppointment(myPatient, myDoctor,
_
start.AddMinutes(i * 30))
callTime += appointmentService.TimedListTodaysAppointments()
Dim millisThisCall As Integer = callTime.Milliseconds
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Improving Service Quality
Module 7: Improving WCF Service Quality
[Visual C#]
// TODO 4
TimeSpan callTime =
appointmentService.TimedCreateAppointment(myPatient,
myDoctor, start.AddMinutes(i * 30));
callTime += appointmentService.TimedListTodaysAppointments();
int millisThisCall = callTime.Milliseconds;
3.
On the Debug menu, click Start Debugging.
4.
In the High Speed Appointment Maker window, increase the number of
client threads to 10, and then click Go.
After all the threads finish running, make a note of the average value for the
call duration across the 10 threads reported in the dialog box, and then click
OK.
Compare this value with the ones you recorded in Task 2. Verify that this new
value is significantly lower because it is recording the duration of calls on the
service side when there are only 3 concurrent calls. This does not include any
wait time.
5.
On the Debug menu, click Stop Debugging.
6.
In Solution Explorer, expand the ContosoServicesSelfHostExtConfig project,
right-click app.config, and then click Edit WCF Configuration.
7.
Expand Advanced folder, expand the Service Behaviors folder, expand the
HttpMexAndExceptionDetail behavior, and then click serviceThrottling.
8.
In the serviceThrottling pane on the right side, set the value of
MaxConcurrentCalls property to 20.
9.
In the WCF Service Configuration Editor window, on the File menu, click
Save.
10. Close the WCF Service Configuration Editor window.
11. On the Debug menu, click Start Debugging.
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L7-135
12. In the High Speed Appointment Maker window, increase the number of
client threads to 10, and then click Go.
After all the threads finish running, make a note of the average value for the
call duration across the 10 threads reported in the dialog box, and then click
OK.
Verify that this value is slightly higher than the value you recorded earlier in
this task. Has removing throttling increased or decreased this overall serviceside time?
You should find that setting the throttling value to more than the number of
calling threads has increased the average time taken per-call when measured
from the service side. This is because there are now potentially 10 concurrent
calling threads contending for service-side resources at the same time. This will
slow things down and so a higher call time will be seen.
13. On the Debug menu, click Stop Debugging.
14. Close Visual Studio 2008.
Results: After completing this exercise, you have seen how to use throttling and
how it affects the callers to a service.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Improving Service Quality
Module 7: Improving WCF Service Quality
Exercise 4: Passing Bulk Data Between a WCF Client and
Service
Scenario
The consultants using the Contoso Clinic Management System will need access to
large amounts of patient data in the form of MRI scan and X-ray images. These files
will be far larger than is reasonable to pass as a standard parameter, so they will
need some form of special handling.
In this exercise, you will pass large binary data across a WCF service interface
using both MTOM and streaming.
The main tasks for this exercise are as follows:
1.
Add an operation to return an image as a byte array to a WCF service.
2.
Add a service endpoint that uses MTOM encoding.
3.
Add code to the client to call the new operation.
4.
Configure the client to use MTOM encoding.
5.
View the raw MTOM messages.
6.
Add a streamed method to the contract.
7.
Change the service-side endpoint to support streaming.
8.
Change the client code to call the new operation.
9.
Configure the client to use streaming.
10. View the raw streamed messages.
f Task 1: Add an operation to return an image as a byte array to a WCF
service
1.
On the Start menu, point to All Programs, point to Microsoft Visual Studio
2008, right-click Microsoft Visual Studio 2008, and then click Run as
administrator.
2.
In the User Account Control dialog box, click Continue.
MCT USE ONLY. STUDENT USE PROHIBITED
L7-136
3.
L7-137
On the File menu, point to Open, and then click Project/Solution.
•
If you are using Visual Basic, in the Open Project dialog box, go to the
folder E:\Labfiles\Starter\VB\BulkData\ConnectedWCF, and then
double-click ConnectedWCF.sln.
•
If you are using Visual C#, in the Open Project dialog box, go to the
folder E:\Labfiles\Starter\CS\BulkData\ConnectedWCF, and then
double-click ConnectedWCF.sln.
4.
In Solution Explorer, expand the PatientManagementService project, rightclick the PatientManagementServiceImageContract file, and then click View
Code.
5.
Locate the TODO 5 comment, and then add the following code to the
PatientManagementServiceImageContract interface.
[Visual Basic]
' TODO 5
_
Function GetXrayImage(ByVal patientId As String, _
ByVal type As String) As Byte()
[Visual C#]
// TODO 5
[OperationContract]
byte[] GetXrayImage(string patientId, string type);
6.
In Solution Explorer, under the PatientManagementService project, rightclick the PatientManagementServiceImplementation file, and then click
View Code.
7.
Locate the TODO 6 comment, and then add
PatientManagementServiceImageContract to the list of interfaces
implemented by the PatientManagementServiceImplementation class.
[Visual Basic]
' TODO 6
Public Class PatientManagementServiceImplementation
Implements PatientManagementServiceContract
Implements PatientManagementServiceImageContract
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Improving Service Quality
Module 7: Improving WCF Service Quality
[Visual C#]
// TODO 6
public class PatientManagementServiceImplementation :
PatientManagementServiceContract,
PatientManagementServiceImageContract
8.
If you are using Visual Basic, click after
PatientManagementServiceImageContract, and then press ENTER. If you are
using Visual C#, right-click PatientManagementServiceImageContract, point
to Implement Interface, and then click Implement Interface.
9.
Locate the GetXrayImage method and modify the code as shown in the
following code.
[Visual Basic]
Public Function GetXrayImage(ByVal patientId As String, _
ByVal type As String) As Byte() Implements _
PatientManagementServiceImageContract.GetXrayImage
Dim memoryStream As MemoryStream = GetImageAsStream(type)
Return memoryStream.ToArray()
End Function
[Visual C#]
public byte[] GetXrayImage(string patientId, string type)
{
MemoryStream memoryStream = GetImageAsStream(type);
return memoryStream.ToArray();
}
f Task 2: Add an endpoint for the contract that uses MTOM encoding
1.
In Solution Explorer, expand the ContosoServicesSelfHostExtConfig project,
right-click app.config, and then click Edit WCF Configuration.
2.
Expand the Services folder, and then expand the
com.contoso.PatientManagementService.PatientManagementServiceImple
mentation node.
3.
Right-click Endpoints, and then click New Service Endpoint.
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4.
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In the Service Endpoint pane on the right side, configure the endpoint as
follows:
•
Name: PMIService_WS
•
Address: PatientManagementServiceImages
•
Binding: wsHttpBinding
•
Contract:
com.contoso.PatientManagementService.PatientManagementServiceIm
ageContract
5.
In the Configuration pane, right-click Bindings, and then click New Binding
Configuration.
6.
In the Create a New Binding dialog box, click wsHttpBinding, and then click
OK.
7.
In the right pane, configure the binding as follows:
•
Name: WebServiceMtomBindingConfig
•
MessageEncoding: Mtom
8.
In the Configuration pane, click the PMIService_WS endpoint. In the right
pane, set the BindingConfiguration property to
WebServiceMtomBindingConfig.
9.
In the WCF Service Configuration Editor window, on the File menu, click
Save.
10. Close the WCF Service Configuration Editor window.
11. In Solution Explorer, right-click Solution 'Connected WCF', and then click
Rebuild Solution.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Improving Service Quality
Module 7: Improving WCF Service Quality
f Task 3: Add code to the client to call the new operation
1.
On the Start menu, point to All Programs, point to Accessories, and then
click Windows Explorer.
2.
In Windows Explorer, move to the following location:
•
If you are using Visual Basic, go to
E:\Labfiles\Starter\VB\BulkData\ConnectedWCF\ContosoServicesSel
fHostExtConfig\bin\Debug.
•
If you are using Visual C#, go to
E:\Labfiles\Starter\CS\BulkData\ConnectedWCF\ContosoServicesSel
fHostExtConfig\bin\Debug.
Right-click the file ContosoServicesSelfHostExtConfig.exe, and then click
Run as Administrator.
3.
In the User Account Control dialog box, click Allow.
4.
In the Windows Security Alert dialog box, click Unblock.
5.
Switch to Visual Studio 2008.
6.
In Solution Explorer, expand the ConsultantClient project, expand the
Service References folder, right-click PatientManagementServiceReference,
and then click Update Service Reference.
7.
Switch to the ContosoServicesSelfHostExtConfig console window, and then
press ENTER to close the service host application.
8.
Switch to Visual Studio 2008.
9.
In Solution Explorer, in the ConsultantClient project, right-click the
ConsultantForm file, and then click View Code.
10. Locate the TODO 7 comment in the GetImageStreamFromBytes method, and
then make the following changes to the code:
•
Remove the existing line of code that throws a
NotImplementedException.
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L7-140
•
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Add the following code to this method.
[Visual Basic]
Private Function GetImageStreamFromBytes(ByVal typeOfXray As
String) _
As MemoryStream
' TODO 7
Dim patientManagementServiceImages As _
PatientManagementServiceImageContract = New _
PatientManagementServiceImageContractClient()
Dim imageBytes As Byte() = _
patientManagementServiceImages.GetXrayImage(PatientId.Text,
_
typeOfXray)
Return New MemoryStream(imageBytes)
End Function
[Visual C#]
private MemoryStream GetImageStreamFromBytes(string typeOfXray)
{
// TODO 7
PatientManagementServiceImageContract
patientManagementServiceImages =
new PatientManagementServiceImageContractClient();
byte[] imageBytes =
patientManagementServiceImages.GetXrayImage(PatientId.Text,
typeOfXray);
return new MemoryStream(imageBytes);
}
11. Locate the TODO 8 comment in the GetImage_Click method. Add the
following line of code to the method.
[Visual Basic]
' TODO 8
imageStream.Close()
[Visual C#]
// TODO 8
imageStream.Close();
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Improving Service Quality
Module 7: Improving WCF Service Quality
f Task 4: Configure and run the client
1.
In Solution Explorer, in the ConsultantClient project, right-click app.config,
and then click Edit WCF Configuration.
2.
Expand the Client folder, expand the Endpoints folder, and then click
PMIService_WS and verify that this endpoint already has a binding
configuration named PMIService_WS.
3.
In the Configuration pane, expand the Bindings folder, and then click
PMIService_WS (wsHttpBinding). In the wsHttpBinding : PMIService_WS
pane, do the following:
•
Examine the value of the MessageEncoding and verify that it is already set
to Mtom.
•
Set the value of the MaxReceivedMessageSize property to 12000000 (12
million).
•
Set the value of the MaxArrayLength under ReaderQuotasProperties to
12000000 (12 million).
4.
On the File menu, click Save.
5.
Close the WCF Service Configuration Editor window.
6.
On the Debug menu, click Start Debugging.
7.
In the Windows Security Alert message box, click Unblock.
8.
In the Consultant Client window, click the Patient Information tab. On the
Patient Information tab, click Chest, and then click Get Image.
Verify that an X-ray image is displayed on the Patient Information tab.
9.
On the Debug menu, click Stop Debugging.
f Task 5: View the raw MTOM messages
1.
On the Windows Start menu, point to All Programs, point to Microsoft
Windows SDK v6.0A, point to Tools, and then click Service Trace Viewer.
2.
In the Service Trace Viewer, on the File menu, click Add.
3.
In the Open dialog box, go to the E:\LabFiles\logs folder, click the file
messages.svclog, and then click Open.
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L7-143
4.
In the Service Trace Viewer, in the left pane, click the Message tab to display a
list of messages passed between the client and the service. This tab lists the
messages by their Action values and sorts them in time order.
5.
Click a message with an action of
http://contoso.com/ClinicManagementSystem/2007/10/PatientManagem
entServiceImageContract/GetXrayImage, scrolling down the list if necessary.
Note: You will see each message and response listed twice. This is because the
service has been configured to log each message at the message level and the
transport level.
6.
In the lower-right pane, click the Message tab, and then examine the HTTP
request header. Verify that the WebHeaders element contains a Content-Type
element that in turn contains a string that starts with
multipart/related;type="application/xop+xml". This confirms that it is using
MTOM encoding.
7.
Click a message with an action of
http://contoso.com/ClinicManagementSystem/2007/10/PatientManagem
entServiceImageContract/GetXrayImageResponse.
8.
In the lower-right pane, click the Message tab, and then examine the SOAP
message. Scroll down to find the SOAP body and verify that its
element contains an empty GetXrayImageResult element. This is because the
content is in a separate MIME part.
f Task 6: Add a streamed method to the contract
1.
In Solution Explorer, under the PatientManagementService project, rightclick the PatientManagementServiceImageContract file, and then click View
Code.
2.
Locate the TODO 5 comment, and then add the following WCF operation.
[Visual Basic]
' TODO 5
_
Function StreamXrayImage(ByVal patientId As String, ByVal type As _
String) As Stream
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Improving Service Quality
Module 7: Improving WCF Service Quality
[Visual C#]
// TODO 5
[OperationContract]
Stream StreamXrayImage(string patientId, string type);
3.
Locate the TODO 9 comment and add the following statement.
[Visual Basic]
' TODO 9
Imports System.IO
[Visual C#]
// TODO 9
using System.IO;
4.
In Solution Explorer, under the PatientManagementService project, rightclick the PatientManagementServiceImplementation file, and then click
View Code.
5.
Locate the TODO 6 comment. If you are using Visual Basic, click after
PatientManagementServiceImageContract, and then press ENTER. If you are
using Visual C#, right-click PatientManagementServiceImageContract, point
to Implement Interface, and then click Implement Interface.
6.
Locate the StreamXrayImage method, and then make the following changes
to the code.
[Visual Basic]
Public Function StreamXrayImage(ByVal patientId As String, _
ByVal type As String) As System.IO.Stream Implements _
PatientManagementServiceImageContract.StreamXrayImage
Dim imagePath As String = "..\..\DataFiles\xray_" & type &
".bmp"
Return File.OpenRead(imagePath)
End Function
[Visual C#]
public Stream StreamXrayImage(string patientId, string type)
{
string imagePath = @"..\..\DataFiles\xray_" + type + ".bmp";
return File.OpenRead(imagePath);
}
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L7-145
f Task 7: Change the service-side endpoint to support streaming
1.
In Solution Explorer, expand the ContosoServicesSelfHostExtConfig project,
right-click app.config, and then click Edit WCF Configuration.
2.
Expand the Services folder, and then expand the
com.contoso.PatientManagementService.PatientManagementServiceImple
mentation node.
3.
Right-click Endpoints, and then click the New Service Endpoint. In the
Service Endpoint pane on the right side, configure the endpoint as follows:
•
Name: PMIService_TCP
•
Address: PatientManagementServiceImages
•
Binding: netTcpBinding
•
Contract:
com.contoso.PatientManagementService.PatientManagementServiceIm
ageContract
4.
In the Configuration pane, right-click Bindings, and then click New Binding
Configuration.
5.
In the Create a New Binding dialog box, click netTcpBinding, and then click
OK.
6.
In the right pane, configure the binding as follows:
•
Name: NetTcpStreamingBindingConfig
•
TransferMode: Streamed
7.
In the Configuration pane, click the PMIService_TCP endpoint. In the right
pane, set the BindingConfiguration to NetTcpStreamingBindingConfig.
8.
In the WCF Service Configuration Editor window, on the File menu, click
Save.
9.
Close the WCF Service Configuration Editor window.
10. In Solution Explorer, right-click Solution 'Connected WCF', and then click
Rebuild Solution.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Improving Service Quality
Module 7: Improving WCF Service Quality
f Task 8: Change the client code to call the new operation
1.
Switch to Windows Explorer.
2.
In Windows Explorer, go to the following location:
•
If you are using Visual Basic, go to
E:\Labfiles\Starter\VB\BulkData\ConnectedWCF\
ContosoServicesSelfHostExtConfig\bin\Debug.
•
If you are using Visual C#, go to
E:\Labfiles\Starter\CS\BulkData\ConnectedWCF\
ContosoServicesSelfHostExtConfig\bin\Debug.
Right-click the file ContosoServicesSelfHostExtConfig.exe, and click Run as
Administrator.
3.
In the User Account Control dialog box, click Allow.
4.
In the Windows Security Alert dialog box, click Unblock.
5.
In Solution Explorer, expand the ConsultantClient project, expand the
Service References folder, right-click PatientManagementServiceReference,
and then click Update Service Reference.
6.
Return to the ContosoServicesSelfHostExtConfig console window, and then
press ENTER to close the service host.
7.
In Solution Explorer, in the ConsultantClient project, right-click the
ConsultantForm file, and then click View Code.
8.
Locate the TODO 10 comment in the GetImageStream method, and then
modify the method as shown in the following code.
[Visual Basic]
Private Function GetImageStream(ByVal typeOfXray As String) As
Stream
' TODO 10
Dim patientManagementServiceImages As _
PatientManagementServiceImageContract = _
New
PatientManagementServiceImageContractClient("PMIService_TCP")
Return _
patientManagementServiceImages. _
StreamXrayImage(PatientId.Text, typeOfXray)
End Function
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[Visual C#]
private Stream GetImageStream (string typeOfXray)
{
// TODO 10
PatientManagementServiceImageContract
patientManagementServiceImages =
new
PatientManagementServiceImageContractClient("PMIService_TCP");
return
patientManagementServiceImages.
StreamXrayImage(PatientId.Text, typeOfXray);
}
9.
Locate the TODO 11 comment, and then replace the call to
GetImageStreamFromBytes with a call to GetImageStream.
[Visual Basic]
' TODO 11
Dim imageStream As Stream = GetImageStream(typeOfXray)
[Visual C#]
// TODO 11
Stream imageStream = GetImageStream(typeOfXray);
f Task 9: Configure and run the client
1.
In Solution Explorer, under the ConsultantClient project, right-click
app.config, and then click Edit WCF Configuration.
2.
Expand the Endpoints folder under the Client folder, and then click
PMIService_TCP.
3.
In the Configuration pane, expand the Bindings folder, and then click
PMIService_TCP (netTcpBinding). In the netTcpBinding : PMIService_TCP
pane, do the following:
•
Examine the value of the TransferMode and verify that it is already set to
Streamed.
•
Set the value of the MaxReceivedMessageSize property to 12000000 (12
million).
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Improving Service Quality
Module 7: Improving WCF Service Quality
4.
In the WCF Service Configuration Editor window, on the File menu, click
Save.
5.
Close the WCF Service Configuration Editor window.
6.
On the Debug menu, click Start Debugging.
7.
In the Consultant Client window, click the Patient Information tab. On the
Patient Information tab, click Chest, and then click Get Image.
You should see an X-ray image displayed on the Patient Information tab.
8.
On the Debug menu, click Stop Debugging.
f Task 10: View the raw streamed messages
1.
Switch to the Service Trace Viewer.
2.
In the Service Trace Viewer, on the File menu, click Open.
3.
In the Open dialog box, go to the E:\LabFiles\logs folder, click the file
messages.svclog, and then click Open.
4.
In the Service Trace Viewer, in the left pane, click the Message tab to display a
list of messages passed between the client and the service. This tab lists the
messages by their Action values and sorts them in time order.
5.
Click a message with an action of
http://contoso.com/ClinicManagementSystem/2007/10/PatientManagem
entServiceImageContract/StreamXrayImageResponse, scrolling down the
list if necessary.
Note: You will see each message and response listed twice. This is because the
service has been configured to log each message at the message level and the
transport level.
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6.
L7-149
In the lower-right pane, click the Message tab, and then examine the SOAP
message. Scroll down to find the SOAP body and verify that its
element contains …stream….
Results: After completing this exercise, you have seen how to pass bulk binary data
between a WCF client and service.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Improving Service Quality
Module 8: Implementing WCF Security
Lab: Protecting a Service
Logon Information:
•
Virtual Machine: 6461A-LON-DEV-08
•
User Name: Student
•
Password: Pa$$w0rd
Estimated time: 40 minutes
L8-151
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Protecting a Service
Module 8: Implementing WCF Security
Exercise 1: Applying Security for Internal Network
Communication
Scenario
The clinic management system allows users to access sensitive patient data, and
the system then passes that data across the clinic network. You need to be sure that
only authorized users can access the patient data and that this data is encrypted at
all times when in transit.
In this exercise, you will start to secure the connections made by the clinic
administration client application. This requires you to apply message-level security
to a message exchange to sign and encrypt message contents. You will then ensure
that only authorized users can access patient data.
The main tasks for this exercise are as follows:
1.
Start the 6461-LON-DEV-08 virtual machine and log on as Student.
2.
Apply message-level encryption to a service.
3.
Apply message-level encryption to a client.
4.
Use message logging to see the effects of message-level encryption on the
message contents.
5.
Display caller credentials in the service.
6.
Provide Windows credentials from the client to the service.
f Task 1: Start the 6461-LON-DEV-08 virtual machine and log on as
Student
1.
Open the Virtual Server Remote Control Client, and then double-click 6461LON-DEV-08.
2.
Log on to 6461-LON-DEV-08 as Student using the password Pa$$w0rd.
f Task 2: Apply message-level encryption to a service
1.
On the taskbar, click Start, point to All Programs, point to Microsoft Visual
Studio 2008, right-click Microsoft Visual Studio 2008, and then click Run as
administrator.
2.
In the User Account Control dialog box, click Continue.
MCT USE ONLY. STUDENT USE PROHIBITED
L8-152
3.
On the File menu, point to Open, and then click Project/Solution.
4.
Do one of the following:
L8-153
•
If you are using Microsoft® Visual Basic® development system, in the
Open Project dialog box, go to the folder
E:\Labfiles\Starter\VB\InternalNetwork\ConnectedWCF, and then
double-click ConnectedWCF.sln.
•
If you are using Microsoft Visual C#® development tool, in the Open
Project dialog box, go to the folder
E:\Labfiles\Starter\CS\InternalNetwork\ConnectedWCF, and then
double-click ConnectedWCF.sln.
5.
In Solution Explorer, expand the ContosoServicesSelfHostExtConfig project,
right-click the app.config file (for Visual Basic) or the App.config file (for
Visual C#), and then click Edit WCF Configuration.
6.
In the WCF Service Configuration Editor, right-click the Bindings folder, and
then click New Binding Configuration.
7.
In the Create a New Binding dialog box, select the netTcpBinding binding
type, and then click OK.
The WCF Service Configuration Editor generates a binding configuration with
the default settings for the NetTcpBinding binding.
8.
In the right pane of the WCF Service Configuration Editor, change the Name
property of the binding to NetTcpSecureMessageBindingConfig.
9.
Click the Security tab.
10. Change the Mode property to Message. Under MessageSecurityProperties,
change the AlgorithmSuite property to Basic128. Leave the
MessageClientCredentialType property set to Windows.
Note: These settings cause the binding to apply message-level security so that the
message contents will be encrypted and signed as defined by WS-Security. Users will
be expected to provide a valid Microsoft Windows® operating system user name
and password for the credentials, and then all messages will be encrypted by a 128bit algorithm, which is relatively quick, but it provides sufficient privacy for messages
inside an organization.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Protecting a Service
Module 8: Implementing WCF Security
11. In the left pane of the WCF Service Configuration Editor, in the Services
folder, expand the
com.contoso.AppointmentService.AppointmentServiceImplementation
service, expand the Endpoints folder, and then click the APService_TCP
endpoint.
12. In the right pane, set the BindingConfiguration property to
NetTcpSecureMessageBindingConfig.
13. On the File menu, click Save.
14. On the File menu, click Exit.
f Task 3: Apply message-level encryption to a client
1.
In Solution Explorer, expand the ClinicAdminClient project, right-click the
app.config file (for Visual Basic) or the App.config file (for Visual C#), and
then click Edit WCF Configuration.
2.
In the WCF Service Configuration Editor, expand the Bindings folder, and
then click the APService_TCP binding configuration.
3.
Click the Security tab.
4.
Change the Mode property to Message. Under MessageSecurityProperties,
change the AlgorithmSuite property to Basic128. Leave the
MessageClientCredentialType property set to Windows.
5.
On the File menu, click Save.
6.
On the File menu, click Exit.
7.
In Solution Explorer, right-click Solution 'Connected WCF', and then click
Rebuild Solution. Ensure that the solution builds successfully before
continuing.
f Task 4: Use message logging to see the effects of message-level
encryption on the message contents
1.
On the Debug menu, click Start Debugging.
2.
In the Windows Security Alert dialog box, click Unblock.
3.
On the Clinic Administration Client form, click the Create Appointment tab.
4.
Click Find Slots, and then make sure that a list of available slots displays.
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L8-155
5.
On the Debug menu, click Stop Debugging.
6.
On the taskbar, click Start, point to All Programs, point to Microsoft
Windows SDK v6.0A, point to Tools, and then click Service Trace Viewer.
7.
In the Service Trace Viewer, on the File menu, click Add.
8.
In the Open dialog box, go to the E:\LabFiles\logs folder, click the file
messages.svclog, and then click Open.
9.
In the Service Trace Viewer, in the left pane, click the Message tab to display a
list of messages passed between the client and the service. This tab lists the
messages by their Action values and sorts them in time order.
10. Click the most recent message with an action of
http://contoso.com/ClinicManagementSystem/2007/10/AppointmentServ
iceContract/ListAvailableAppointmentTimesResponse, scrolling down the
list if necessary.
Note: You will see each message and response listed twice. This is because the
service has been configured to log each message at the message level and the
transport level.
11. In the lower-right pane, click the Message tab, and then examine the SOAP
message that was passed from the transport-level to the message-level. Scroll
down to find the SOAP body, and then verify that it contains an
element.
12. In the left pane, click the penultimate message with an action of
http://contoso.com/ClinicManagementSystem/2007/10/AppointmentServ
iceContract/ListAvailableAppointmentTimesResponse. In the lower-right
pane, scroll down again to the SOAP message body, and then verify that it
contains an unencrypted list of available appointment times.
13. In the Service Trace Viewer, on the File menu, click Exit.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Protecting a Service
Module 8: Implementing WCF Security
f Task 5: Display caller credentials in the service
1.
In Solution Explorer, expand the AppointmentService project, right-click the
AppointmentServiceImplementation class file, and then click View Code.
2.
In the Code Editor window for the AppointmentServiceImplementation class
file, locate the TODO 1 comment, and then add the
ShowSecurityInformation method shown in the following code example. This
method writes a message to the console to show the identity under which the
operation is running.
[Visual Basic]
...
' TODO 1.
Private Shared Sub ShowSecurityInformation(ByVal methodName As
String)
Console.WriteLine("{0} thread principal is {1}", methodName, _
Thread.CurrentPrincipal.Identity.Name)
Console.WriteLine("{0} security context primary identity is "
_
& "{1}", methodName, _
ServiceSecurityContext.Current.PrimaryIdentity.Name)
Console.WriteLine("{0} security context windows identity is " _
& "{1}", methodName, _
ServiceSecurityContext.Current.WindowsIdentity.Name)
End Sub
...
[Visual C#]
// TODO 1
private static void ShowSecurityInformation(string methodName)
{
Console.WriteLine("{0} thread principal is {1}",
methodName,
Thread.CurrentPrincipal.Identity.Name);
Console.WriteLine("{0} security context primary identity is
{1}",
methodName,
ServiceSecurityContext.Current.PrimaryIdentity.Name);
Console.WriteLine("{0} security context windows identity is
{1}",
methodName,
ServiceSecurityContext.Current.WindowsIdentity.Name);
}
MCT USE ONLY. STUDENT USE PROHIBITED
L8-156
3.
L8-157
Locate the TODO 2 comment in the ListAvailableAppointmentTimes
method, and then add a statement to call the ShowSecurityInformation
method, passing "ListAvailableAppointmentTimes" as the parameter.
[Visual Basic]
...
' TODO 2.
ShowSecurityInformation("ListAvailableAppointmentTimes")
...
[Visual C#]
// TODO 2
ShowSecurityInformation("ListAvailableAppointmentTimes");
4.
On the Debug menu, click Start Debugging.
5.
On the Clinic Administration Client form, click the Create Appointment tab.
6.
Click Find Slots.
7.
In the console window for the ContosoServicesSelfHostExtConfig
application, verify that the security information displayed shows LONDEV\Student for the thread principal, the primary identity, and the Windows
identity of the request.
8.
In Visual Studio 2008, on the Debug menu, click Stop Debugging.
f Task 6: Provide Windows credentials from the client to the service
1.
In Solution Explorer, expand the ClinicAdminClient project, right-click the
ClinicAdminForm class file, and then click View Code.
2.
In the Code Editor window for the ClinicAdminForm class file, locate the
TODO 3 comment in the findSlots_Click method, and then change the type
of the proxy variable to AppointmentServiceContractClient.
[Visual Basic]
' TODO 3.
Dim proxy As New AppointmentServiceContractClient()
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Protecting a Service
Module 8: Implementing WCF Security
[Visual C#]
// TODO 3
AppointmentServiceContractClient proxy =
new AppointmentServiceContractClient();
3.
Locate the TODO 4 comment, and then add code to explicitly set the
credentials used when calling the service. In this case, this uses an
intentionally fake user name to prove that authentication must take place
correctly.
[Visual Basic]
' TODO 4.
proxy.ClientCredentials.Windows.ClientCredential.UserName = "Fred"
proxy.ClientCredentials.Windows.ClientCredential.Password =
"Secret"
proxy.ClientCredentials.Windows.ClientCredential.Domain =
"TestDomain"
[Visual C#]
// TODO 4
proxy.ClientCredentials.Windows.ClientCredential.UserName = "Fred";
proxy.ClientCredentials.Windows.ClientCredential.Password =
"Secret";
proxy.ClientCredentials.Windows.ClientCredential.Domain =
"TestDomain";
4.
On the Debug menu, click Start Debugging.
5.
On the Clinic Administration Client form, click the Create Appointment tab.
6.
Click Find Slots, and then examine the SecurityNegotiationException
exception that occurs because of the invalid credentials. Verify that it contains
the message "The caller was not authenticated by the service."
7.
In Visual Studio 2008, on the Debug menu, click Stop Debugging.
MCT USE ONLY. STUDENT USE PROHIBITED
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8.
L8-159
In the Code Editor window for the ClinicAdminForm class file, locate the
TODO 4 comment, and then change the values for the Windows credentials to
valid credentials to prove that the authentication works correctly when
specifying credentials programmatically.
[Visual Basic]
' TODO 4.
proxy.ClientCredentials.Windows.ClientCredential.UserName = _
"LocalAdmin"
proxy.ClientCredentials.Windows.ClientCredential.Password =
"Pa$$w0rd"
proxy.ClientCredentials.Windows.ClientCredential.Domain = "LON-DEV"
[Visual C#]
// TODO 4
proxy.ClientCredentials.Windows.ClientCredential.UserName =
"LocalAdmin";
proxy.ClientCredentials.Windows.ClientCredential.Password =
"Pa$$w0rd";
proxy.ClientCredentials.Windows.ClientCredential.Domain = "LONDEV";
9.
On the Debug menu, click Start Debugging.
10. On the Clinic Administration Client form, click the Create Appointment tab.
11. Click Find Slots.
12. In the console window for the ContosoServicesSelfHostExtConfig
application, verify that the security information displayed shows LONDEV\LocalAdmin for the thread principal, the primary identity, and the
Windows identity of the request.
13. In Visual Studio 2008, on the Debug menu, click Stop Debugging.
14. Close Visual Studio 2008.
Results: After completing this exercise, you have seen how to secure message
contents using message-level security and how to pass Windows credentials from a
client to a service.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Protecting a Service
Module 8: Implementing WCF Security
Exercise 2: Applying Security for Internet Communication
Scenario
The clinic management system allows remote family practitioner administrators to
make appointments for patients. You need to be sure that only authorized users
can make such appointments and that the system encrypts the data when in transit
across the Internet.
In this exercise, you will secure the connections made by the family practitioner
client application to the appointment service. This requires you to apply transportlevel security to a message exchange that encrypts the entire communication,
including message headers. You will then ensure that only authorized users can
access patient data.
The main tasks for this exercise are as follows:
1.
Create and install an SSL certificate on IIS.
2.
Create an IIS-based Web site to host your service.
3.
Add the service functionality to your IIS-based Web site.
4.
Call the SSL-protected service.
f Task 1: Create and install an SSL certificate on IIS
1.
On the taskbar, click Start, point to All Programs, point to Microsoft Visual
Studio 2008, point to Visual Studio Tools, right-click Microsoft Visual
Studio 2008 Command Prompt, and then click Run as administrator.
2.
In the User Account Control dialog box, click Continue.
3.
In the command prompt window, type the following command:
makecert -sr LocalMachine -ss My -n CN=LON-DEV -sky exchange -sk
HTTPS-Key
You should see the message "Succeeded" if makecert created the certificate
correctly. If you have any problems with makecert, run it with the /? flag to
see its options.
4.
On the taskbar, click Start, click Control Panel, click System and
Maintenance, click Administrative Tools, and then double-click Internet
Information Services (IIS) Manager.
5.
In the User Account Control dialog box, click Continue.
MCT USE ONLY. STUDENT USE PROHIBITED
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6.
In the Internet Information Services (IIS) Manager, in the left pane, expand
the LON-DEV node, expand Web Sites, right-click Default Web Site, and then
click Edit Bindings.
7.
In the Web Site Bindings dialog box, click Add.
8.
In the Add Web Site Binding dialog box, set Type to https, set the SSL
certificate to LON-DEV, and then click OK.
9.
In the Web Site Bindings dialog box, click Close.
f Task 2: Create an IIS-based Web site to host your service
1.
On the taskbar, click Start, point to All Programs, point to Microsoft Visual
Studio 2008, right-click Microsoft Visual Studio 2008, and then click Run as
administrator
2.
In the User Account Control dialog box, click Continue.
3.
On the File menu, point to Open, and then click Project/Solution.
4.
Do one of the following:
•
If you are using Visual Basic, in the Open Project dialog box, go to the
folder E:\Labfiles\Starter\VB\Internet\ConnectedWCF, and then
double-click ConnectedWCF.sln.
•
If you are using Visual C#, in the Open Project dialog box, go to the
folder E:\Labfiles\Starter\CS\ Internet\ConnectedWCF, and then
double-click ConnectedWCF.sln.
5.
In Solution Explorer, right-click Solution 'ConnectedWCF', point to Add, and
then click New Web Site.
6.
In the Add New Web Site dialog box, select the WCF Service template. Set the
Location to HTTP and specify the language as follows:
•
If you are using Visual Basic, set the Language to Visual Basic.
•
If you are using Visual C#, set the Language to Visual C#.
7.
Click Browse.
8.
In the left pane of the Choose Location dialog box, click Local IIS. In the right
pane, click Default Web Site, and then click the Create New Virtual
Directory icon in the upper-right corner of the dialog box.
9.
In the New Virtual Directory dialog box, enter ContosoInternetGateway as
the Alias name.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Protecting a Service
Module 8: Implementing WCF Security
10. Click Browse next to the Folder box.
11. In the Browse For Folder dialog box, do one of the following:
•
If you are using Visual Basic, go to the folder
E:\Labfiles\Starter\VB\Internet\ConnectedWCF.
•
If you are using Visual C#, go to the folder E:\Labfiles\Starter\CS\
Internet\ConnectedWCF.
12. Click the New Folder icon in the toolbar.
13. Rename the new folder ContosoInternetGateway, and then press ENTER.
14. In the Browse For Folder dialog box, click Select Folder.
15. In the New Virtual Directory dialog box, click OK.
16. In the Choose Location dialog box, click the ContosoInternetGateway folder.
Select the Use Secure Sockets Layer check box at the bottom of the dialog
box, and then click Open.
17. In the Add New Web Site dialog box, verify that the address for the new Web
site is https://localhost/ContosoInternetGateway, and then click OK.
18. Switch to the Internet Information Services (IIS) Manager.
19. In the left pane, expand the LON-DEV node, expand Web Sites, expand
Default Web Site, and then click the ContosoInternetGateway node.
20. At the bottom of the main pane, click Features View.
21. In the IIS section of the main panel, double-click SSL Settings.
22. In the SSL Settings pane, select Require SSL, but leave all the other properties
at their default values.
23. In the right pane, click Apply. You should see the message "The changes have
been successfully saved".
24. In the Internet Information Services (IIS) Manager navigation bar, click Back,
and then in the main panel, double-click Authentication.
25. In the Authentication pane, click Basic Authentication. In the right pane,
click Enable.
26. Close the Internet Information Services (IIS) Manager.
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f Task 3: Add the service functionality to your IIS-based Web site
1.
Switch to Microsoft Visual Studio 2008.
2.
In Solution Explorer, expand the
https://localhost/ContosoInternetGateway/ Web site.
3.
Expand the App_Code folder, and do one of the following:
•
If you are using Visual Basic, delete the files IService.vb and Service.vb.
•
If you are using Visual C#, delete the files IService.cs and Service.cs.
4.
Right-click https://localhost/ContosoInternetGateway/, and then click Add
Reference.
5.
In the Add Reference dialog box, click the Projects tab, click
AppointmentService, and then click OK.
6.
In Solution Explorer, rename Service.svc as AppointmentService.svc.
7.
Right-click the AppointmentService.svc file, and then click View Markup. In
the code view window, remove the CodeBehind attribute, and then change the
value of the Service attribute to
com.contoso.AppointmentService.AppointmentServiceImplementation.
[Visual Basic]
<%@ ServiceHost Language="vb" Debug="true"
Service="com.contoso.AppointmentService.AppointmentServiceImplement
ation" %>
[Visual C#]
<%@ ServiceHost Language="C#" Debug="true"
Service="com.contoso.AppointmentService.AppointmentServiceImplement
ation" %>
8.
In Solution Explorer, right-click web.config, and then click Edit WCF
Configuration.
9.
Expand the Services folder, and then click Service. In the right pane, set the
Name value to
com.contoso.AppointmentService.AppointmentServiceImplementation.
10. In the left pane, expand the Endpoints folder under
com.contoso.AppointmentService.AppointmentServiceImplementation,
and then click the first (Empty Name) node.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Protecting a Service
Module 8: Implementing WCF Security
11. Change the Binding to basicHttpBinding, change the contract to
com.contoso.AppointmentService.AppointmentServiceContract, and then
set the name to APService_HTTPS. Leave the Address empty.
12. In the left pane, click the second (Empty Name) node, change the binding to
mexHttpsBinding, and then set the name to Metadata_HTTPS.
13. In the left pane, right-click the Bindings folder, and then click New Binding
Configuration. In the Create a New Binding dialog box, click
basicHttpBinding, and then click OK.
14. In the right pane, set the Name property of the binding to
BasicHttpSecureTransportBindingConfig.
15. Click the Security tab.
16. Change the Mode property to Transport. Under
TransportSecurityProperties, set the TransportClientCredentialType to
None.
17. In the left pane, click the APService_HTTPS endpoint.
18. In the right pane, set the BindingConfiguration property to
BasicHttpSecureTransportBindingConfig.
19. In the left pane, expand the Advanced folder, expand the Service Behaviors
folder, expand the ServiceBehavior folder, and then click serviceMetadata. In
the right pane, change the value of HttpsGetEnabled to true and the value of
HttpGetEnabled to false.
20. On the File menu, click Save.
21. On the File menu, click Exit.
22. In Solution Explorer, right-click Solution 'Connected WCF', and then click
Rebuild Solution. Ensure that the solution builds successfully.
23. Start Internet Explorer, and then go to the URL
https://localhost/ContosoInternetGateway/AppointmentService.svc.
Internet Explorer will display the message "There is a problem with this
Website's security certificate." Click Continue to this Website. Verify that you
see the service test page for the AppointmentServiceImplementation.
24. Close Internet Explorer.
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L8-165
f Task 4: Call the SSL-protected service
1.
Switch to Visual Studio 2008.
2.
In Solution Explorer, expand the FPAdminClient project.
3.
Right-click the FPAdminForm class file, and then click View Code.
4.
In the GetAppointmentServiceProxy method, locate the TODO 5 comment,
and then make the following changes:
a.
Change the URL of the endpoint address to
https://localhost/ContosoInternetGateway/AppointmentService.svc.
b.
Alter the BasicHttpBinding to pass the value
BasicHttpSecurityMode.Transport into the constructor.
Your code should now look like the following.
[Visual Basic]
' TODO 5
Dim address As New _
EndpointAddress("https://localhost/ContosoInternetGateway/" _
& "AppointmentService.svc")
Dim binding As New
BasicHttpBinding(BasicHttpSecurityMode.Transport)
[Visual C#]
// TODO 5
EndpointAddress address = new
EndpointAddress("https://localhost/ContosoInternetGateway/"
+ "AppointmentService.svc");
BasicHttpBinding binding =
new
BasicHttpBinding(BasicHttpSecurityMode.Transport);
5.
In Solution Explorer, right-click app.config, and then click Edit WCF
Configuration.
6.
In the Service Configuration Editor, expand the Bindings folder, and then
click APService_HTTP.
7.
In the right pane, click the Security tab.
8.
Change the Mode property to Transport. Under
TransportSecurityProperties, set the TransportClientCredentialType to
None.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Protecting a Service
Module 8: Implementing WCF Security
9.
On the File menu, click Save.
10. On the File menu, click Exit.
11. On the Debug menu, click Start Debugging.
12. On the Clinic Administration Client form, click Find Slots. Verify that the
application throws an exception with the message "Could not establish a trust
relationship for the SSL/TLS secure channel with authority 'localhost'."
13. In Visual Studio 2008, on the Debug menu, click Stop Debugging.
14. In Solution Explorer, right-click the FPAdminForm class file, and then click
View Code. Locate the TODO 5 comment, and then add the following
statement that calls the Enact method on PermissiveCertificatePolicy,
passing the name used in the certificate: "CN=LON-DEV".
[Visual Basic]
' TODO 5
PermissiveCertificatePolicy.Enact("CN=LON-DEV")
[Visual C#]
// TODO 5
PermissiveCertificatePolicy.Enact("CN=LON-DEV");
15. On the Debug menu, click Start Without Debugging.
16. On the Clinic Administration Client form, click the Create Appointment tab.
17. Click Find Slots. Verify that no exception occurs and that the list of possible
appointment times appears.
18. Close the FP Appointment Client form.
Results: After completing this exercise, you have seen how to secure message
contents across the Internet using transport-level security.
MCT USE ONLY. STUDENT USE PROHIBITED
L8-166
Module 9: Implementing Transactions
Lab: Implementing Transactions
for a Service
Logon Information:
•
Virtual Machine: 6461A-LON-DEV-09
•
User Name: Student
•
Password: Pa$$w0rd
Estimated time: 40 minutes
L9-167
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Implementing Transactions for a Service
Module 9: Implementing Transactions
Exercise 1: Control the Flow of a Transaction from Client to
Service
Scenario
You are a developer for the Contoso Clinic Management System. The requirement
for making an appointment says that the creation of the appointment and the
issuing of the appointment letter must be performed together.
In this exercise, you will flow a transaction from client to service to ensure that
appointments are not marked as taken unless subsequent processing succeeds.
The main tasks for this exercise are as follows:
1.
Start the 6461-LON-DEV-09 virtual machine and log on as Student.
2.
Add transactional requirements to the appointment service contract.
3.
Configure the service to flow transactions.
4.
Configure the client to flow transactions.
5.
Start a transaction from the client.
6
Ensure that failure in the client transaction rolls back the changes to the
appointment service.
f Task 1: Start the 6461-LON-DEV-09 virtual machine and log on as
Student
1.
Open the Virtual Server Remote Control Client, and then double-click 6461LON-DEV-09.
2.
Log on to 6461-LON-DEV-09 as Student using the password Pa$$w0rd.
f Task 2: Add transactional requirements to the appointment service
contract
1.
On the taskbar, click Start, point to All Programs, point to Microsoft Visual
Studio 2008, right-click Microsoft Visual Studio 2008, and then click Run as
administrator.
2.
In the User Account Control dialog box, click Continue.
3.
On the File menu, point to Open, and then click Project/Solution.
MCT USE ONLY. STUDENT USE PROHIBITED
L9-168
4.
L9-169
Do one of the following:
•
If you are using Microsoft® Visual Basic® development system, in the
Open Project dialog box, go to the folder
E:\Labfiles\Starter\VB\TransactionFlow\ConnectedWCF, and then
double-click ConnectedWCF.sln.
•
If you are using Microsoft Visual C#® development tool, in the Open
Project dialog box, go to the folder
E:\Labfiles\Starter\CS\TransactionFlow\ConnectedWCF, and then
double-click ConnectedWCF.sln.
5.
In Solution Explorer, expand the AppointmentService project.
6.
Right-click AppointmentServiceContract, and then click View Code.
7.
In the Code Editor window for the AppointmentServiceContract class file,
locate the TODO 1 comment, and then add the TransactionFlow attribute to
the CreateAppointment operation with a parameter of
TransactionFlowOption.Mandatory.
[Visual Basic]
...
' TODO 1.
_
...
[Visual C#]
...
// TODO 1
[TransactionFlow(TransactionFlowOption.Mandatory)]
...
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Implementing Transactions for a Service
Module 9: Implementing Transactions
f Task 3: Configure the service to flow transactions
1.
In Solution Explorer, right-click AppointmentServiceImplementation, and
then click View Code.
2.
In the Code Editor window for the AppointmentServiceImplementation class
file, locate the TODO 2 comment, and then add the OperationBehavior
attribute to the CreateAppointment operation with a parameter of
TransactionsScopeRequired set to true.
[Visual Basic]
...
' TODO 2.
_
...
[Visual C#]
...
// TODO 2
[OperationBehavior(TransactionScopeRequired=true)]
...
3.
In Solution Explorer, under the AppointmentService project, right-click
References, and then click Add Reference. In the Add Reference dialog box,
click the .NET tab, click the System.Transactions assembly, and then click
OK.
4.
In the Code Editor window, locate the TODO 3 comment, and then import the
System.Transactions namespace.
[Visual Basic]
...
' TODO 3.
Imports System.Transactions
...
[Visual C#]
...
// TODO 3
using System.Transactions;
...
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L9-170
5.
L9-171
Locate the TODO 4 comment, and then add the ShowTransactionalStatus
method to the AppointmentServiceImplementation class.
[Visual Basic]
...
' TODO 4.
Private Shared Sub ShowTransactionalStatus(ByVal methodName As
String)
If Transaction.Current IsNot Nothing Then
Console.WriteLine("{0} called in transactional scope, " & _
"id is {1}", methodName, _
Transaction.Current.TransactionInformation.LocalIdentifier)
Else
Console.WriteLine("{0} called outside of transactional " &
_
"scope", methodName)
End If
End Sub
...
[Visual C#]
...
// TODO 4
private static void ShowTransactionalStatus(string methodName)
{
if (Transaction.Current != null)
{
Console.WriteLine("{0} called in transactional scope, " +
"id is {1}", methodName,
Transaction.Current.TransactionInformation.LocalIdentifier);
}
else
{
Console.WriteLine("{0} called outside of transactional
scope",
methodName);
}
}
...
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Implementing Transactions for a Service
Module 9: Implementing Transactions
6.
Locate the TODO 5 comment, and then invoke the ShowTransactionalStatus
method from inside the CreateAppointment method.
[Visual Basic]
...
' TODO 5.
ShowTransactionalStatus("CreateAppointment")
...
[Visual C#]
...
// TODO 5
ShowTransactionalStatus("CreateAppointment");
...
7.
In Solution Explorer, expand the ContosoServicesSelfHostExtConfig project,
right-click the app.config file and then click Edit WCF Configuration.
8.
In the Configuration pane of the WCF Configuration Editor, right-click
Bindings, and then click New Binding Configuration.
9.
In the Create a New Binding dialog box, click wsHttpBinding, and then click
OK.
10. In the wsHttpBinding: NewBinding0 pane of the WCF Configuration Editor,
do the following:
a.
On the Binding tab, set the Name property to
WsHttpTransactionalBindingConfig in the (Configuration) category.
b.
On the Binding tab, set the TransactionFlow property to True in the
(General) category.
11. In the Configuration pane of the WCF Configuration Editor, right-click
Bindings, and then click New Binding Configuration.
12. In the Create a New Binding dialog box, select netTcpBinding, and then click
OK.
13. In the netTcpBinding: NewBinding0 pane of the WCF Configuration Editor,
do the following:
a.
On the Binding tab, set the Name property to
NetTcpTransactionalBindingConfig in the (Configuration) category.
b.
On the Binding tab, set the TransactionFlow property to True in the
(General) category.
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L9-173
14. In the Configuration pane of the WCF Configuration Editor, expand Services,
expand
com.contoso.AppointmentService.AppointmentServiceImplementation,
and then expand Endpoints.
15. Click the APService_WS entry and select
WsHttpTransactionalBindingConfig as the value of the
BindingConfiguration property.
16. Click the APService_TCP entry and select
NetTcpTransactionalBindingConfig as the value of the
BindingConfiguration property.
17. On the File menu, click Save.
18. On the File menu, click Exit.
19. In Solution Explorer, right-click Solution 'Connected WCF', and then click
Rebuild Solution. Ensure that the solution builds successfully before moving
on.
f Task 4: Configure the client to flow transactions
1.
On the taskbar, click Start, point to All Programs, point to Accessories, and
then click Windows Explorer.
2.
Locate the transactional service host in Windows Explorer:
•
If you are using Visual Basic, go to the folder
E:\Labfiles\Starter\VB\TransactionFlow\ConnectedWCF\ContosoSer
vicesSelfHostExtConfig\bin\debug.
•
If you are using Visual C#, go to the folder
E:\Labfiles\Starter\CS\TransactionFlow\ConnectedWCF\ContosoSer
vicesSelfHostExtConfig\bin\debug.
3.
Right-click ContosoServicesSelfHostExtConfig.exe, and then click Run as
administrator.
4.
In the User Account Control dialog box, click Allow.
5.
In the Windows Security Alert dialog box, click Unblock.
6.
Switch to Microsoft Visual Studio® 2008 development system. In Solution
Explorer, expand the ClinicAdminClient project.
7.
Expand Service References, right-click AppointmentServiceReference, and
then click Update Service Reference.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Implementing Transactions for a Service
Module 9: Implementing Transactions
8.
After the service reference updates, stop the
ContosoServicesSelfHostExtConfig by pressing ENTER in the console
window.
9.
In Visual Studio 2008, in the ClinicAdminClient project, right-click the
app.config file, and then click Edit WCF Configuration.
10. In the Configuration pane of the WCF Configuration Editor, expand Bindings.
11. Click the binding configuration named APService_WS (wsHttpBinding), and
then set the TransactionFlow property to True in the (General) category of
the Binding tab.
12. Click the binding configuration named APService_TCP (netTcpBinding), and
then set the TransactionFlow property to True in the (General) category of
the Binding tab.
13. On the File menu, click Save.
14. On the File menu, click Exit.
f Task 5: Start a transaction from the client
1.
In Solution Explorer, expand the ClinicAdminClient project.
2.
Right-click References, and then click Add Reference. In the Add Reference
dialog box, click the .NET tab, click the System.Transactions assembly, and
then click OK.
3.
In Solution Explorer, right-click ClinicAdminForm, and then click View Code.
4.
In the Code Editor window, locate the TODO 9 comment, and then import the
System.Transactions namespace.
[Visual Basic]
...
' TODO 9.
Imports System.Transactions
...
[Visual C#]
...
// TODO 9
using System.Transactions;
...
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L9-174
5.
L9-175
Locate the TODO 10 comment in the
MakeAppointmentWithClientTransaction method. Wrap the lines of code
that create proxies for the Appointment Service and Patient Letters Service,
and then use these proxies to create an appointment and send a letter in a
TransactionScope. Call Complete() at the end of the scope.
[Visual Basic]
...
' TODO 10.
Using scope As New TransactionScope()
Dim proxy As AppointmentServiceContract = _
GetAppointmentServiceProxy()
appointmentId = proxy.CreateAppointment(patientId, doctorId,
slot)
Dim patientLetterServiceProxy As PatientLetterServiceContract =
_
New PatientLetterServiceContractClient("PLService_HTTP")
'TODO 11.
patientLetterServiceProxy.SendLetter(LetterType. _
ConsultationBooked, patientId, doctorId, slot)
scope.Complete()
End Using
...
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Implementing Transactions for a Service
Module 9: Implementing Transactions
[Visual C#]
...
// TODO 10.
using (TransactionScope scope = new TransactionScope())
{
AppointmentServiceContract proxy =
GetAppointmentServiceProxy();
appointmentId = proxy.CreateAppointment(patientId,
doctorId, slot);
PatientLetterServiceContract patientLetterServiceProxy =
new PatientLetterServiceContractClient("PLService_HTTP");
// TODO 11.
patientLetterServiceProxy.SendLetter(LetterType.
ConsultationBooked, patientId, doctorId, slot);
scope.Complete();
}
...
6.
In Solution Explorer, right-click Solution 'Connected WCF', and then click
Rebuild Solution. Ensure that the solution builds successfully before moving
on.
f Task 6: Ensure that failure in the client transaction rolls back the
changes to the appointment service
1.
On the Debug menu, click Start Debugging.
2.
In the Windows Security Alert dialog box, click Unblock.
3.
In the Clinic Administration Client form, click the Create Appointment tab.
4.
Click Find Slots, and then click the first slot on the list. Make a note of the
time for the slot that you have selected. Type the patient ID NH991199Z into
the Patient drop-down list box, and then click Create.
5.
In the dialog box confirming that the appointment has been made, click OK.
6.
Click Find Slots again, and then ensure that the slot you chose is no longer
listed as available.
7.
On the Debug menu, click Stop Debugging.
MCT USE ONLY. STUDENT USE PROHIBITED
L9-176
8.
In Solution Explorer, expand the ClinicAdminClient project.
9.
Right-click ClinicAdminForm, and then click View Code.
L9-177
10. In the Code Editor window for the ClinicAdminForm class file, in the
MakeAppointmentWithClientTransaction method, locate the TODO 11
comment, and then add the following code.
[Visual Basic]
...
' TODO 11.
If causeAnIntentionalError Then
Throw New ApplicationException("This is an intentional error" &
_
"to cause problems for a transaction")
End If
...
[Visual C#]
...
// TODO 11
if (causeAnIntentionalError)
{
throw new ApplicationException("This is an intentional error "
+
"to cause problems for a transaction");
}
...
11. In Solution Explorer, right-click Solution 'Connected WCF', and then click
Rebuild Solution.
12. On the Debug menu, click Start Debugging.
13. In the Clinic Administration Client form, click the Create Appointment tab.
14. Click Find Slots, and then click to select the first slot on the list. Make a note
of which slot you have selected. Type the patient ID NH991199Z into the
Patient drop-down list box, and then click Create.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Implementing Transactions for a Service
Module 9: Implementing Transactions
15. In the dialog box displaying the error message, click OK.
16. Click Find Slots again, and then verify that the slot you chose is still available.
This proves that the effects of the CreateAppointment operation have been
rolled back because of this client-side exception that aborts the transaction.
17. On the Debug menu, click Stop Debugging.
Results: After completing this exercise, you have seen how to flow a transaction
from a client application to a service and ensure that when the transaction is
aborted, the changes made by the service are rolled back.
MCT USE ONLY. STUDENT USE PROHIBITED
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L9-179
Exercise 2: Force a Transaction to Start When a Service
Operation Is Called
To avoid the need for transactions on the client, you have decided to refactor the
small piece of transactional workflow code you created earlier so that the server
creates all the transactions.
In this exercise, you will move the workflow code that creates the appointment and
send the patient letter from the client to the Clinic Management Service.
The main tasks for this exercise are as follows:
1.
Add references to the Clinic Management Service so that it can act as a client
for the Appointment Service and Patient Letter Service.
2.
Enable transaction flow on the client endpoints.
3.
Implement the appointment and letter workflow in the Clinic Management
Service.
4.
Replace the client invocations with a call to the Clinic Management Service.
5.
Ensure that failure in the Clinic Management Service transaction rolls back
the changes to the appointment service.
f Task 1: Add references to the Clinic Management Service so that it can
act as a client for the Appointment Service and Patient Letter Service
1.
Switch to Microsoft Visual Studio 2008.
2.
On the File menu, point to Open, and then click Project/Solution.
3.
In the Open Project dialog box, do one of the following:
4.
•
If you are using Visual Basic, go to
E:\Labfiles\Starter\VB\AutomaticTransactions\ConnectedWCF, and
then double-click ConnectedWCF.sln.
•
If you are using Visual C#, go to
E:\Labfiles\Starter\CS\AutomaticTransactions\ConnectedWCF, and
then double-click ConnectedWCF.sln.
In Solution Explorer, right-click Solution 'Connected WCF', and then click
Rebuild Solution.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Implementing Transactions for a Service
Module 9: Implementing Transactions
5.
Switch to Windows Explorer, and then locate the service host executable file:
•
If you are using Visual Basic, go to the folder
E:\Labfiles\Starter\VB\AutomaticTransactions\ConnectedWCF\Cont
osoServicesSelfHostExtConfig\bin\debug.
•
If you are using Visual C#, go to the folder
E:\Labfiles\Starter\CS\AutomaticTransactions\ConnectedWCF\Cont
osoServicesSelfHostExtConfig\bin\debug.
6.
Right-click ContosoServicesSelfHostExtConfig.exe, and then click Run as
administrator.
7.
In the User Account Control dialog box, click Allow.
8.
In the Windows Security Alert dialog box, click Unblock.
9.
Switch to Visual Studio 2008. In Solution Explorer, right-click the
ClinicManagementService project, and then click Add Service Reference.
10. In the Add Service Reference dialog box, perform the following tasks:
a.
In the Address box, type http://localhost:8001/Contoso
b.
Click Go.
c.
In the Namespace box, type PatientLetterServiceReference
d. Click OK.
11. Right-click Service References, and then click Add Service Reference.
12. In the Add Service Reference dialog box, do the following:
a.
Type http://localhost:8000/Contoso into the Address box
b.
Click Go
c.
Type AppointmentServiceReference into the Namespace box
d. Click OK
13. Stop the ContosoServicesSelfHostExtConfig by pressing ENTER in the
console window.
14. In Solution Explorer, expand the ClinicManagementService project.
15. Right-click on the app.config file and click Delete.
16. Right-click ClinicManagementServiceImplementation, and then click View
Code.
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17. Locate the TODO 12 comment, and then import the
com.contoso.ClinicManagementService.AppointmentServiceReference and
com.contoso.ClinicManagementService.PatientLetterServiceReference
namespaces.
[Visual Basic]
...
' TODO 12.
Imports Com.contoso.ClinicManagementService. _
AppointmentServiceReference
Imports com.contoso.ClinicManagementService. _
PatientLetterServiceReference
...
[Visual C#]
...
// TODO 12
using
com.contoso.ClinicManagementService.AppointmentServiceReference;
using com.contoso.ClinicManagementService.
PatientLetterServiceReference;
...
f Task 2: Enable transaction flow on the appointment service client
endpoint
1.
In Solution Explorer, in the ContosoServicesSelfHostExtConfig project, rightclick the app.config file, and then click Edit WCF Configuration.
2.
In the Configuration pane of the WCF Configuration Editor, expand Bindings.
3.
Click the binding configuration named APService_TCP, and then verify that
the TransactionFlow property is set to True in the (General) category of the
Binding tab.
4. On the File menu, click Save.
5. On the File menu, click Exit.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Implementing Transactions for a Service
Module 9: Implementing Transactions
f Task 3: Implement the appointment and letter workflow in the Clinic
Management Service
1.
In Solution Explorer, expand the ClinicManagementService project.
2.
Right-click ClinicManagementServiceContract, and then click View Code.
3.
In the Code Editor window for the ClinicManagementServiceContract class
file, locate the TODO 13 comment, and then add a definition for the
CreateAppointmentWorkflow operation.
[Visual Basic]
...
' TODO 13.
_
Function CreateAppointmentWorkflow(ByVal patientId As String, _
ByVal doctorId As String, ByVal slot As DateTime, ByVal _
causeAnIntentionalError As Boolean) As String
...
[Visual C#]
// TODO 13
[OperationContract]
string CreateAppointmentWorkflow(string patientId, string doctorId,
DateTime slot, bool causeAnIntentionalError);
4.
In Solution Explorer, expand the ClinicAdminClient project.
5.
Right-click ClinicAdminForm, and then click View Code.
6.
Locate the MakeAppointmentWithClientTransaction method, select the
code for the method, including the method signature and parentheses, rightclick the selected code, and then click Copy.
7.
In Solution Explorer, return to the ClinicManagementService project.
8.
Right-click ClinicManagementServiceImplementation, and then click View
Code.
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9.
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In the Code Editor window for the
ClinicManagementServiceImplementation file, locate the TODO 14
comment, right-click in the code window, and then click Paste.
[Visual Basic]
...
' TODO 14.
Private Function MakeAppointmentWithClientTransaction(ByVal _
patientId As String, ByVal doctorId As String, ByVal slot As _
DateTime) As String
Dim causeAnIntentionalError As Boolean = True
Dim appointmentId As String = "UNDEFINED"
' TODO 10.
Using scope As New TransactionScope()
Dim proxy As AppointmentServiceContract = _
GetAppointmentServiceProxy()
appointmentId = proxy.CreateAppointment(patientId, _
doctorId, slot)
Dim patientLetterServiceProxy As _
PatientLetterServiceContract = _
New
PatientLetterServiceContractClient("PLService_HTTP")
'TODO 11.
If causeAnIntentionalError Then
Throw New ApplicationException("This is an intentional"
_
" error to cause problems for a transaction")
End If
patientLetterServiceProxy.SendLetter(LetterType. _
ConsultationBooked, patientId, doctorId, slot)
scope.Complete()
End Using
Return appointmentId
End Function
...
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Implementing Transactions for a Service
Module 9: Implementing Transactions
[Visual C#]
...
// TODO 14
private string MakeAppointmentWithClientTransaction(string
patientId,
string doctorId, DateTime slot)
{
bool causeAnIntentionalError = true;
string appointmentId = "UNDEFINED";
// TODO 10
using (TransactionScope scope = new TransactionScope())
{
AppointmentServiceContract proxy =
GetAppointmentServiceProxy();
appointmentId = proxy.CreateAppointment(patientId,
doctorId, _
slot);
PatientLetterServiceContract patientLetterServiceProxy =
new
PatientLetterServiceContractClient("PLService_HTTP");
// TODO 11
if (causeAnIntentionalError)
{
throw new ApplicationException("This is an intentional"
" error to cause problems for a transaction");
}
patientLetterServiceProxy.SendLetter(LetterType.
ConsultationBooked, patientId, doctorId,slot);
scope.Complete();
}
return appointmentId;
}
...
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10. Change the method name to CreateAppointmentWorkflow, make the
method public, and then change the method signature to match that defined
in the service contract.
[Visual Basic]
...
' TODO 14.
Public Function CreateAppointmentWorkflow(ByVal patientId As
String, _
ByVal doctorId As String, ByVal slot As Date, ByVal _
causeAnIntentionalError As Boolean) As String Implements _
ClinicManagementServiceContract.CreateAppointmentWorkflow
...
[Visual C#]
...
// TODO 14
public string CreateAppointmentWorkflow(string patientId, string
doctorId, DateTime slot, bool causeAnIntentionalError)
...
11. Inside the CreateAppointmentWorkflow method, perform the following
tasks:
a.
Remove the using statement that creates the TransactionScope object,
and then delete the scope.Complete() statement.
b.
Remove the definition of the local variable causeAnIntentionalError.
c.
Add a statement that calls the
ClinicManagementServiceHelper.ShowTransactionalStatus message,
passing the name of the CreateAppointmentWorkflow method as the
parameter after the declaration of appointmentId local variable.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Implementing Transactions for a Service
Module 9: Implementing Transactions
The completed code should look like the following.
[Visual Basic]
...
' TODO 14.
Public Function CreateAppointmentWorkflow(ByVal patientId As
String, _
ByVal doctorId As String, ByVal slot As DateTime, ByVal _
causeAnIntentionalError As Boolean) As String Implements _
ClinicManagementServiceContract.CreateAppointmentWorkflow
Dim appointmentId As String = "UNDEFINED"
ClinicManagementServiceHelper.ShowTransactionalStatus( _
"CreateAppointmentWorkflow")
Dim proxy As AppointmentServiceContract = _
GetAppointmentServiceProxy()
appointmentId = proxy.CreateAppointment(patientId, doctorId,
slot)
Dim patientLetterServiceProxy As PatientLetterServiceContract =
_
New PatientLetterServiceContractClient("PLService_HTTP")
' TODO 11
If causeAnIntentionalError Then
Throw New ApplicationException("This is an intentional" & _
" error to cause problems for a transaction")
End If
patientLetterServiceProxy.SendLetter(LetterType. _
ConsultationBooked, patientId, doctorId, slot)
Return appointmentId
End Function
...
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[Visual C#]
...
// TODO 14
public string CreateAppointmentWorkflow(string patientId, string
doctorId, DateTime slot, bool causeAnIntentionalError)
{
string appointmentId = "UNDEFINED";
ClinicManagementServiceHelper.ShowTransactionalStatus(
"CreateAppointmentWorkflow");
AppointmentServiceContract proxy = GetAppointmentServiceProxy();
appointmentId = proxy.CreateAppointment(patientId, doctorId,
slot);
PatientLetterServiceContract patientLetterServiceProxy =
new PatientLetterServiceContractClient("PLService_HTTP");
// TODO 11
if (causeAnIntentionalError)
{
throw new ApplicationException("This is an intentional" +
"error to cause problems for a transaction");
}
patientLetterServiceProxy.SendLetter(LetterType.
ConsultationBooked, patientId, doctorId, slot);
return appointmentId;
}
...
12. Locate the statement that calls the GetAppointmentServiceProxy method in
the CreateAppointmentWorkflow method, and then replace it with a
statement that creates a new instance of the
AppointmentServiceContractClient passing the endpoint name
APService_TCP.
[Visual Basic]
...
Dim proxy As AppointmentServiceContract = _
New AppointmentServiceContractClient("APService_TCP")
...
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Implementing Transactions for a Service
Module 9: Implementing Transactions
[Visual C#]
...
AppointmentServiceContract proxy =
new AppointmentServiceContractClient("APService_TCP");
...
13. Locate the TODO 14 comment, and add a OperationBehavior to the
CreateAppointmentWorkflow then set its TransactionScopeRequired
property to true.
[Visual Basic]
...
' TODO 14.
_
...
[Visual C#]
...
// TODO 14
[OperationBehavior(TransactionScopeRequired = true)]
...
14. In Solution Explorer, right-click Solution 'Connected WCF', and then click
Rebuild Solution. Ensure that the solution builds successfully before moving
on.
f Task 4: Replace the client invocations with a call to the Clinic
Management Service
1.
Switch to Windows Explorer.
2.
Locate the transactional service host application:
3.
•
If you are using Visual Basic, go to the folder
E:\Labfiles\Starter\VB\AutomaticTransactions\ConnectedWCF\Cont
osoServicesSelfHostExtConfig\bin\debug.
•
If you are using Visual C#, go to the folder
E:\Labfiles\Starter\CS\AutomaticTransactions\ConnectedWCF\Cont
osoServicesSelfHostExtConfig\bin\debug.
Right-click ContosoServicesSelfHostExtConfig.exe, and then click Run as
administrator.
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4.
In the User Account Control dialog box, click Allow.
5.
Switch to Visual Studio 2008.
6.
In Solution Explorer, expand the ClinicAdminClient project.
7.
Expand Service References, right-click ClinicManagementServiceReference,
and then click Update Service Reference.
8.
After the service reference updates, stop the
ContosoServicesSelfHostExtConfig by pressing ENTER in the console
window.
9.
In Solution Explorer, right-click ClinicAdminForm, and then click View Code.
10. Locate the TODO 15 comment in the createAppointment_Click method, and
then replace the statement that calls the
MakeAppointmentWithClientTransaction method with statement that calls
the MakeAppointmentWithServerTransaction method, passing the same
parameters.
[Visual Basic]
...
' TODO 15.
Dim appointmentId As String = _
MakeAppointmentWithServerTransaction(patientId.Text, _
doctorId.Text, slot)
...
[Visual C#]
...
// TODO 15
string appointmentId =
MakeAppointmentWithServerTransaction(patientId.Text,
doctorId.Text, slot);
...
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Implementing Transactions for a Service
Module 9: Implementing Transactions
11. Locate the TODO 16 comment, and then add the following
MakeAppointmentWithServerTransaction method to the ClinicAdminForm
class.
[Visual Basic]
...
' TODO 16.
Private Function MakeAppointmentWithServerTransaction(ByVal _
patientId As String, ByVal doctorId As String, ByVal slot As _
DateTime) As String
Dim causeAnIntentionalError As Boolean = False
Dim clinicManagementServiceProxy As _
ClinicManagementServiceContract = New _
ClinicManagementServiceContractClient()
Return clinicManagementServiceProxy.CreateAppointmentWorkflow(
_
patientId, doctorId, slot, causeAnIntentionalError)
End Function
...
[Visual C#]
...
// TODO 16
private string MakeAppointmentWithServerTransaction(string
patientId,
string doctorId, DateTime slot)
{
bool causeAnIntentionalError = false;
ClinicManagementServiceContract clinicManagementServiceProxy =
new
ClinicManagementServiceContractClient();
return clinicManagementServiceProxy.CreateAppointmentWorkflow(
patientId, doctorId, slot, causeAnIntentionalError);
}
...
MCT USE ONLY. STUDENT USE PROHIBITED
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f Task 5: Ensure that failure in the Clinic Management Service
transaction rolls back the changes to the appointment service
1.
On the Debug menu, click Start Debugging.
2.
In the Clinic Administration Client form, click the Create Appointment tab.
3.
Click Find Slots, and then click the first slot on the list. Make a note of which
slot you have selected. Type the patient ID NH991199Z into the Patient dropdown list box, and then click Create.
4.
In the dialog box that confirms the appointment has been made, click OK.
5.
Click Find Slots again, and then verify that the slot you chose is no longer
available.
6.
On the Debug menu, click Stop Debugging.
7.
In Solution Explorer, expand the ClinicAdminClient project.
8.
Right-click ClinicAdminForm, and then click View Code.
9.
In the Code Editor window for the ClinicAdminForm class file, locate the
MakeAppointmentWithServerTransaction method. Change the value of the
causeAnIntentionalError variable to true.
[Visual Basic]
...
Dim causeAnIntentionalError As Boolean = True
...
[Visual C#]
...
bool causeAnIntentionalError = true;
...
10. In Solution Explorer, right-click Solution 'Connected WCF', and then click
Rebuild Solution.
11. On the Debug menu, click Start Debugging.
12. In the Clinic Administration Client form, click the Create Appointment tab.
13. Click Find Slots, and then click to select the first slot on the list. Make a note
of which slot you have selected. Type the patient ID NH991199Z into the
Patient drop-down list box, and then click Create.
MCT USE ONLY. STUDENT USE PROHIBITED
Lab: Implementing Transactions for a Service
Module 9: Implementing Transactions
14. When the dialog box titled 'ApplicationException was unhandled by user
code' is displayed, on the Debug menu click Continue.
15. Switch to the Clinic Administration Client.
16. In the dialog box that states there has been an error, click OK.
17. Click Find Slots again, and then verify that the slot you chose is still available.
This proves that the effects of the CreateAppointment operation have been
rolled back because of this server-side exception that aborts the transaction.
18. In Visual Studio 2008, on the Debug menu, click Stop Debugging.
19. Close Visual Studio 2008.
Results: After this exercise, you should have removed the transaction code from the
client and used WCF to automatically start a transaction on the service.
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