Silverlight exception (faults) handling from wcf service

Question

I want get exeption code from wcf method but i always get NotFound error.

Client Side:

public MainPage() { InitializeComponent(); client.TestCompleted += new EventHandler<System.ComponentModel.AsyncCompletedEventArgs>(TestCompleted); } void TestCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e) { if(e.Error!=null) { //HOW to get here my class BaseFault??? } }

Server side:

[ServiceContract] public interface IService1 { [OperationContract] [FaultContract(typeof(BaseFault))] void Test(int id); } public void Test(int id) { try { if (id == -1) ThrowEx(new BaseFault() { ErrorCode = ProcessErrorsCode.InvalidArgument }); else throw new NullReferenceException("some server error with null value"); } catch { ThrowEx(new BaseFault() { ErrorCode = ProcessErrorsCode.InternalServerError }); } } public void ThrowEx(BaseFault fault) { throw new FaultException<BaseFault>(fault); } [DataContract] public class BaseFault { [DataMember] public ProcessErrorsCode ErrorCode { get; set; } }

Config (includeExceptionDetailInFaults set to True):

<configuration> <system.web> <compilation debug="true" targetFramework="4.0" /> </system.web> <system.serviceModel> <behaviors> <serviceBehaviors> <behavior name=""> <serviceMetadata httpGetEnabled="true" /> <serviceDebug includeExceptionDetailInFaults="True" /> </behavior> </serviceBehaviors> </behaviors> <serviceHostingEnvironment multipleSiteBindingsEnabled="true" /> </system.serviceModel> </configuration>

I need to get BaseFault type on my client side. How to do that?

Aliostad · Accepted Answer · 2010-09-06 14:36:19Z

1

Evgeny, how have you created your client proxy? Does your client have access to BaseFault type? What kind of error do you get (type not found, page not found, file not found)?

answered Sep 6, 2010 at 14:36

Aliostad

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8 Comments

Ievgen Over a year ago

Hi! I created client proxy automatically by visual studio. Yes i have access to BaseFault type. Exception: –CommunicationException

Aliostad Over a year ago

Thanks for the point (that's my first)! So the error is CommunicationException and not NotFound? Can you please print the e.Error.ToString() and send to me?

Aliostad Over a year ago

I mean in if(e.Error!=null) { Console.WriteLine(e.Error.ToString()); }

Aliostad Over a year ago

Not really because this is bound to your configuration and I could be getting different error. It appears that buffer size has to do with it and needs to be setup. Have a look here: forums.silverlight.net/forums/t/40770.aspx

Aliostad Over a year ago

Apparantly "because Silverlight has absolutely no concept of a fault".

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Aliostad · Accepted Answer · 2010-09-07 11:03:50Z

Evgeny,

The problem here is that you are getting error 404. This is at the level above WCF service and is handled and returned by the IIS so your request never hits your WCF service. You need to check the endpoint URL of your service and the same on your .svc file/IIS and make sure they are the same. I would actually try browsing to the endpoint URL using a browser and see what I get.

As your link explains, you need to have the code to be able to cast to fault and I assume you are already doing that.

Hope this helps.

Sorry, but end point is defined. I can debug server methods with my client and they working normally, but error handling is a big problem.

Ievgen · Accepted Answer · 2010-09-07 12:18:09Z

Found easy solution for me:

 bool registerResult = WebRequest.RegisterPrefix("http://", WebRequestCreator.ClientHttp);

just add this line of code and it works without configuration.

user3087305 · Accepted Answer · 2013-12-10 14:45:31Z

Add the following in the Application_Startup event handler of your Sliverlight app:

 bool registerResult = WebRequest.RegisterPrefix("http://", WebRequestCreator.ClientHttp);

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