Silverlight 2 Beta 2

06-09-2008 10:05 PM |

I had a Silverlight 2 Beta 1 control that was calling a WCF service. Now after upgrading to Beta 2, there is an error being thrown on the AsyncCallback. The crossdomain.xml and clientaccesspolicy.xml haven't been changed.

Here is the error:

System.Reflection.TargetInvocationException was unhandled by user code
  Message="An exception occurred during the operation, making the result invalid.  Check InnerException for exception details."
  StackTrace:
       at System.ComponentModel.AsyncCompletedEventArgs.RaiseExceptionIfNecessary()
       at Silverlight.AnalysisViewer.AnalysisConfigurationService.AnalysisConfigurationLoadCompletedEventArgs.get_Result()
       at Silverlight.AnalysisViewer.Page.AnalysisConfigurationLoadCompleted(Object sender, AnalysisConfigurationLoadCompletedEventArgs e)
       at Silverlight.AnalysisViewer.AnalysisConfigurationService.AnalysisConfigurationServiceClient.OnAnalysisConfigurationLoadCompleted(Object state)
  InnerException: System.ServiceModel.ProtocolException
       Message="The remote server returned an unexpected response: (404) Not Found."
       StackTrace:
            at System.ServiceModel.AsyncResult.End[TAsyncResult](IAsyncResult result)
            at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result)
            at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
            at System.ServiceModel.ClientBase`1.ChannelBase`1.EndInvoke(String methodName, Object[] args, IAsyncResult result)
            at Silverlight.AnalysisViewer.AnalysisConfigurationService.AnalysisConfigurationServiceClient.AnalysisConfigurationServiceClientChannel.EndAnalysisConfigurationLoad(IAsyncResult result)
            at Silverlight.AnalysisViewer.AnalysisConfigurationService.AnalysisConfigurationServiceClient.Silverlight.AnalysisViewer.AnalysisConfigurationService.IAnalysisConfigurationService.EndAnalysisConfigurationLoad(IAsyncResult result)
            at Silverlight.AnalysisViewer.AnalysisConfigurationService.AnalysisConfigurationServiceClient.OnEndAnalysisConfigurationLoad(IAsyncResult result)
            at System.ServiceModel.ClientBase`1.OnAsyncCallCompleted(IAsyncResult result)

Re: Silverlight 2 Beta 2

06-09-2008 11:36 PM |

There are two things you will need to check.

1. You MUST change your xml file to include the use of headers.  You can copy the one given in the breaking changes directly.
2. If you are calling the service using WebRequest(not a service reference), you can't access FrameWork Elements in the callback.

Sam...

Re: Re: Silverlight 2 Beta 2

06-10-2008 12:12 AM |

How do you allow the use of headers in the cross domain policy in Beta 2?

Re: Silverlight 2 Beta 2

06-10-2008 12:19 AM |

I updated the CrossDomain.xml to:

<!DOCTYPE cross-domain-policy SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">

</cross-domain-policy>

And removed the clientaccesspolicy.xml and I'm still getting the same exception.

I'm using a standard WCF client:

Re: Re: Silverlight 2 Beta 2

06-10-2008 11:06 AM |

Needed to update the ClientAccessPolicy and the CrossDomainPolicy

<access-policy>

<policy>

<domain uri="*"/>

<grant-to>

</grant-to>

</cross-domain-access>

</access-policy>

<!DOCTYPE cross-domain-policy SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">

<allow-http-request-headers-from domain="* " headers="*" />

</cross-domain-policy>