CODEWITHSUNDEEP
.netwcf
gigi
gigi

Reputation: 3936

Hosting an wcf service into a website issue : System.ArgumentException: ServiceHost only supports class service types

I have something like this:

MathServiceLibrary (WCF Service Library)

[ServiceContract]
public interface IMathService
{
        [OperationContract]
        int Add(int x, int y);
        [OperationContract]
        int Multiply(int x, int y);
}

public class MathService : IMathService
{
        public int Add(int x, int y)
        {
            return x + y;
        } 

        public int Multiply(int x, int y)
        {
            return x * y;
        }
}

<behaviors>
   <serviceBehaviors>
      <behavior name="defaultServiceBehavior">
         <serviceMetadata httpGetEnabled="true" />
      </behavior>
   </serviceBehaviors>
</behaviors>
<services>
   <service behaviorConfiguration="defaultServiceBehavior" 
            name="MathServiceLibrary.MathService">
       <endpoint 
           address="mex" 
           binding="mexHttpBinding" 
           contract="IMetadataExchange" />
       <endpoint 
           address="math" 
           binding="wsHttpBinding" 
           contract="MathServiceLibrary.IMathService" />
       <host>
          <baseAddresses>
             <add baseAddress="http://localhost:8080/" />
          </baseAddresses>
       </host>
    </service>
 </services>

If I run this I can see the WCF Test Client and everything is ok.

Now I want to host this service into IIS so I create a web site and add a reference to MathServiceLibrary.

I have this ms.svc

<%@ ServiceHost Language="C#" Debug="true" 
    Service="MathServiceLibrary.IMathService" %>

and this web.config

    <system.serviceModel>
        <services>
            <service behaviorConfiguration="defaultServiceBehavior" name="MathServiceLibrary.MathService">
                <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
                <endpoint address="" binding="wsHttpBinding" contract="MathServiceLibrary.IMathService">
                    <identity>
                        <dns value="localhost"/>
                    </identity>
                </endpoint>
            </service>
        </services>
        <behaviors>
            <serviceBehaviors>
                <behavior name="defaultServiceBehavior">
                    <serviceMetadata httpGetEnabled="true"/>
                    <serviceDebug includeExceptionDetailInFaults="false"/>
                </behavior>
            </serviceBehaviors>
        </behaviors>
        <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
    </system.serviceModel>

When I right click on ms.svc view in browser I get this:

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: ServiceHost only supports class service types.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[ArgumentException: ServiceHost only supports class service types.]
System.ServiceModel.Description.ServiceDescription.GetService(Type serviceType) +12229075
System.ServiceModel.ServiceHost.CreateDescription(IDictionary`2& implementedContracts) +55
System.ServiceModel.ServiceHostBase.InitializeDescription(UriSchemeKeyedCollection baseAddresses) +154
System.ServiceModel.ServiceHost.InitializeDescription(Type serviceType, UriSchemeKeyedCollection baseAddresses) +49
System.ServiceModel.ServiceHost..ctor(Type serviceType, Uri[] baseAddresses) +151
System.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(Type serviceType, Uri[] baseAddresses) +30
System.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(String constructorString, Uri[] baseAddresses) +420
System.ServiceModel.HostingManager.CreateService(String normalizedVirtualPath) +1440
System.ServiceModel.HostingManager.ActivateService(String normalizedVirtualPath) +44
System.ServiceModel.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath) +615

[ServiceActivationException: The service '/MathWebSite/ms.svc' cannot be activated due to an exception during compilation. The exception message is: ServiceHost only supports class service types..]
System.Runtime.AsyncResult.End(IAsyncResult result) +679246
System.ServiceModel.Activation.HostedHttpRequestAsyncResult.End(IAsyncResult result) +190
System.ServiceModel.Activation.HostedHttpRequestAsyncResult.ExecuteSynchronous(HttpApplication context, String routeServiceVirtualPath, Boolean flowContext, Boolean ensureWFService) +234
System.ServiceModel.Activation.HttpModule.ProcessRequest(Object sender, EventArgs e) +355
System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +148
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75

I can't figure out what I am missing.

Upvotes: 8

Views: 6309

Answers (4)

marc_s
marc_s

Reputation: 754240

The entry in your svc file is wrong:

instead of:

<%@ ServiceHost Language="C#" Debug="true" 
    Service="MathServiceLibrary.IMathService" %>

you need to have:

<%@ ServiceHost Language="C#" Debug="true" 
    Service="MathServiceLibrary.MathService" %>

You need to define the service implementation class in the Service= attribute - NOT the service contract!

Upvotes: 3

Rajesh
Rajesh

Reputation: 7876

The svc file needs to have the class name rather than the interface name. A sample svc file has the below contents:

<%@ ServiceHost Language="C#" Debug="true" Service="SampleService.Service1" CodeBehind="Service1.svc.cs" %>

Hope that helps.

Upvotes: 3

AVee
AVee

Reputation: 3402

Your .svc file is wrong. It references the interface, not the implementation. Change it to this: <%@ ServiceHost Language="C#" Debug="true" Service="MathServiceLibrary.MathService" %>

Upvotes: 3

Pavan
Pavan

Reputation: 4329

Change your ms.svc as below

<%@ ServiceHost Language="C#" Debug="true" Service="MathServiceLibrary.MathService" %    >

You have to give the class name instead of interface name

Upvotes: 15

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