Question

I have created the simple web service.
Code:

[ServiceContract]
public interface ITsdxService
{
    [OperationContract]
    void DoWork();

    [OperationContract]
    string Test();
}

public class TsdxService : ITsdxService
{
    public void DoWork()
    {
    }

    public string Test()
    {
        return "Hello World!";
    }
}

Web.config:

<system.serviceModel>
<services>
  <service name="Test.TSDX.UI.TsdxService">
    <endpoint 
        address="Tsdx"
        binding="wsHttpBinding"
        bindingConfiguration="TestBinding"
        contract="Test.TSDX.UI.ITsdxService" />
  </service>
</services>
<bindings>
  <wsHttpBinding>
    <binding name="TestBinding" />
  </wsHttpBinding>
</bindings>
<behaviors>
  <serviceBehaviors>
    <behavior name="">
      <serviceMetadata httpGetEnabled="true" />
      <serviceDebug includeExceptionDetailInFaults="false" />
    </behavior>
  </serviceBehaviors>
</behaviors>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
</system.serviceModel>

When I run from Visual Studio I put localhost:50517/TsdxService.svc?wsdl all works fine – I can see wsdl, but when I put localhost:50517/TsdxService.svc/Tsdx/Test or localhost:50517/TsdxService.svc/Tsdx/DoWork I don’t see anything. The Fiddler tells me that I got 400 error. Breakpoints (on Test and DoWork methods) don’t work. Why? What did I do incorrect?

Answer 1

Add the WebGet attribute to your service operations.

[WebGet]
public string Test() 
{
    ...
}

For this to work, you also need to add WebScriptEnablingBehavior to the service configuration. Also, use the webHttpBinding. These things are all required to allow the service to work as an AJAX service.

Definition:

<endpointBehaviors>
    <behavior name="EndpointBehavior">
        <enableWebScript />
    </behavior>
</endpointBehaviors>

Reference:

<endpoint behaviorConfiguration="EndpointBehavior"
    binding="webHttpBinding"
    ...
/>