Error after adding JSON Endpoint to WCF Silverlight RIA Service

Question

I am attempting to add a json endpoint to an existing WCF RIA Silverlight servive using the info found here:

http://blogs.msdn.com/b/deepm/archive/2010/05/14/silverlight-tv-episode-26-exposing-soap-json-and-odata-endpoints-from-ria-services.aspx

However when I launch the project in debug I get a

The remote server returned an error: NotFound.

error in Silverlight.

The WCF Trace says:

System.ServiceModel.ServiceActivationException: The service '/Services/CTCT-KronosNameManagement-Web-Services-BPAuthenticationDomainService.svc' cannot be activated due to an exception during compilation. The exception message is: Could not load file or assembly 'Microsoft.ServiceModel.DomainServices.Hosting, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.. ---> System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.ServiceModel.DomainServices.Hosting, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified. at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMarkHandle stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName, ObjectHandleOnStack type) at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName) at System.RuntimeType.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark) at System.Type.GetType(String typeName, Boolean throwOnError) at System.ServiceModel.DomainServices.Hosting.DomainServiceHost.CreateEndpointFactoryInstance(ProviderSettings provider) at System.ServiceModel.DomainServices.Hosting.DomainServiceHost.CreateDescription(IDictionary`2& implementedContracts) at System.ServiceModel.ServiceHostBase.InitializeDescription(UriSchemeKeyedCollection baseAddresses) at System.ServiceModel.ServiceHost.InitializeDescription(Type serviceType, UriSchemeKeyedCollection baseAddresses) at System.ServiceModel.DomainServices.Hosting.DomainServiceHost..ctor(Type domainServiceType, Uri[] baseAddresses) at System.ServiceModel.DomainServices.Hosting.DomainServiceHostFactory.CreateServiceHost(Type serviceType, Uri[] baseAddresses) at System.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(String constructorString, Uri[] baseAddresses) at System.ServiceModel.ServiceHostingEnvironment.HostingManager.CreateService(String normalizedVirtualPath, EventTraceActivity eventTraceActivity) at System.ServiceModel.ServiceHostingEnvironment.HostingManager.ActivateService(ServiceActivationInfo serviceActivationInfo, EventTraceActivity eventTraceActivity) at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath, EventTraceActivity eventTraceActivity) --- End of inner exception stack trace ---

If I remove the endpoint in the web config, boom: it works again... Except for the json of course.

 <system.serviceModel>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
    <domainServices>
      <endpoints>
        <add name="JSON" type="Microsoft.ServiceModel.DomainServices.Hosting.JsonEndpointFactory, Microsoft.ServiceModel.DomainServices.Hosting, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
      </endpoints>
    </domainServices>
</system.serviceModel>

I do have the WCF Ria Services Toolkit installed. The System.ServiceModel.DomainServices.Hosting.dll version is 4.1.61829.0

Any suggestions would be very helpful.

Robert Kaucher Robert Kaucher · Accepted Answer · 2012-08-27T12:26:38

Even though Deepesh stated clearly that you needed to add a reference to Microsoft.ServiceModel.DomainServices.Hosting.dll in the write up, I don't think this was mentioned in the video and when I was troubleshooting I saw that I had a reference to System.ServiceModel.DomainServices.Hosting.dll and did not notice the differnece betweent he two DLLs. Adding a reference to the first fixed everything.

Error after adding JSON Endpoint to WCF Silverlight RIA Service

1 Answers