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Custom Binding Imperative

The sample demonstrates how to write imperative code to define and use custom bindings without using a configuration file or a Windows Communication Foundation (WCF) generated client. This sample combines the features provided by the HTTP transport and the reliable session channel to create a reliable HTTP-based binding. This sample is based on the Getting Started Sample that implements a calculator service.

Note Note

The setup procedure and build instructions for this sample are located at the end of this topic.

On both the client and the service, a custom binding is created that contains two binding elements (Reliable Session and HTTP):


ReliableSessionBindingElement reliableSession = new ReliableSessionBindingElement();
reliableSession.Ordered = true;

HttpTransportBindingElement httpTransport = new HttpTransportBindingElement();
httpTransport.AuthenticationScheme = System.Net.AuthenticationSchemes.Anonymous;
httpTransport.HostNameComparisonMode = HostNameComparisonMode.StrongWildcard;

CustomBinding binding = new CustomBinding(reliableSession, httpTransport);

On the service, the binding is used by adding an endpoint to the ServiceHost:

serviceHost.AddServiceEndpoint(typeof(ICalculator), binding, "");

On the client, the binding is used by a ChannelFactory to create a channel to the service:

EndpointAddress address = new EndpointAddress("http://localhost:8000/servicemodelsamples/service");
ChannelFactory<ICalculator> channelFactory = new ChannelFactory<ICalculator>(binding, address);
ICalculator channel = channelFactory.CreateChannel();

This channel is then used to interact with the service:


// Call the Add service operation.
double value1 = 100.00D;
double value2 = 15.99D;
double result = channel.Add(value1, value2);
Console.WriteLine("Add({0},{1}) = {2}", value1, value2, result);

When you run the sample, the operation requests and responses are displayed in the client console window. Press ENTER in the client window to shut down the client.


    Add(100,15.99) = 115.99
    Subtract(145,76.54) = 68.46
    Multiply(9,81.25) = 731.25
    Divide(22,7) = 3.14285714285714

    Press <ENTER> to terminate client.

To set up, build, and run the sample

  1. Be sure you have performed the One-Time Setup Procedure for the Windows Communication Foundation Samples.

  2. To build the C# or Visual Basic .NET edition of the solution, follow the instructions in Building the Windows Communication Foundation Samples.

  3. To run the sample in a single- or cross-machine configuration, follow the instructions in Running the Windows Communication Foundation Samples.

Important note Important

The samples may already be installed on your machine. Check for the following (default) directory before continuing.

<InstallDrive>:\WF_WCF_Samples

If this directory does not exist, go to Windows Communication Foundation (WCF) and Windows Workflow Foundation (WF) Samples for .NET Framework 4 to download all Windows Communication Foundation (WCF) and WF samples. This sample is located in the following directory.

<InstallDrive>:\WF_WCF_Samples\WF\Basic\Binding\Custom\Imperative

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