C# 4 and .NET 4

1384 ❘ ChaPTer 46 messAGe QueuinG
}
{
}
MessageBox.Show(ex.Message, "Course Order Error",
MessageBoxButton.OK, MessageBoxImage.Error);
code snippet CourseOrderSender/CourseOrderWindow.xaml.cs
The application confi guration fi le defi nes the client part of the WCF connection. Again, the
netMsmqBinding is used:
< xml version="1.0" encoding="utf-8" >
< configuration >
< system.serviceModel >
< bindings >
< netMsmqBinding >
< binding name="nonTransactionalQueueBinding"
exactlyOnce="false" >
< security mode="None" / >
< /binding >
< /netMsmqBinding >
< /bindings >
< client >
< endpoint address="net.msmq://localhost/private/courseorder"
binding="netMsmqBinding"
bindingConfiguration="nonTransactionalQueueBinding"
contract="Wrox.ProCSharp.Messaging.ICourseOrderService"
name="queueEndpoint" / >
< /client >
< /system.serviceModel >
< /configuration >
code snippet CourseOrderSender/app.config
When you start the application now, it works in a similar way as before. There is no longer a need to
use classes of the System.Messaging namespace to send and receive messages. Instead, you write the
application in a similar way as using TCP or HTTP channels with WCF.
However, to create message queues and to purge messages, you still need the MessageQueue class. WCF is
only an abstraction to send and receive messages.
If you need to have a System.Messaging application to communicate with a WCF
application, you can do so by using the msmqIntegrationBinding instead of the
netMsmqBinding. This binding uses the message format that is used with COM and
System.Messaging.
message queue insTallaTion
Message queues can be created with the MessageQueue.Create() method. However, the user running an
application usually doesn ’ t have the administrative privileges that are required to create message queues.
Usually, message queues are created with an installation program, using the class
MessageQueueInstaller . If an installer class is part of an application, the command - line utility
installutil.exe (or a Windows Installation Package) invokes the Install() method of the installer.
Visual Studio has special support for using the MessageQueueInstaller with Windows Forms
applications. If a MessageQueue component is dropped from the toolbox onto the form, the smart tag of the
component allows you to add an installer with the menu entry Add Installer. The MessageQueueInstaller
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