Silverlight webservice call works in Studio but fails when run from website

Question

We are building a Silverlight application and have calls to a Silverlight-WCF service. When running the application from Visual Studio everything works perfectly. When we

Answer 1

There are two things that you need to do.

First, provide clientaccesspolicy.xml and/or crossdomain.xml files on the website. This MSDN article has details. I also found this blog entry to be useful.

Second, ensure that your service reference endpoints are pointing to the right URL. For my projects, I have different build configurations (Release, Debug, Test, Beta, etc.) and several endpoints. I then select the appropriate endpoint using #if directives in my code.

For example:

    soapClient =
#if DEBUG
        new MySoapClient("DebugService");
#elif TESTRELEASE
        new MySoapClient("TestService");
#elif BETA
        new MySoapClient("BetaService");
#else
        new MySoapClient("ReleaseService");
#endif

Answer 2

This usually happen when the WCF service is deployed in a different domain in respect to the application location. If this is a temporary situation having tboth service and application on the same domain will solve. If it is not possible create a proxy for the remote service on the application could work.