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Custom Binding Imperative

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The Imperative 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 that implements a calculator service.

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.

See also