Problemas com Silverlight e FaultExceptions.

Question

Pessoal,

Estou tentando fazer com que o Silverlight 4 entenda o FaultExceptions, segui o respectivo link: 

http://msdn.microsoft.com/en-us/library/dd470096%28VS.96%29.aspx .

Mas estou tendo problemas com a tag: <silverlightFaults/>, quando retiro a mesma consigo acessar o serviço perfeitamente, ao usar a mesma o seguinte erro é apresentado:

...

Parser Error Message: An error occurred creating the configuration section handler for system.serviceModel/behaviors: Extension element 'silverlightFaults' cannot be added to this element.  Verify that the extension is registered in the extension collection at system.serviceModel/extensions/behaviorExtensions.
Parameter name: element

...

Segue abaixo o Web.config para uma melhor visualização:

 

<?xml version="1.0"?>

<configuration>
  <system.web>
    <compilation debug="true" targetFramework="4.0" />
    <customErrors mode="Off"/>
  </system.web>

  <system.serviceModel>

    <extensions>
      <behaviorExtensions>
        <add name="silverlightFaults"
             type="Servico.SilverlightFaultBehavior,
                   Servico,
                   Version=1.0.0.0,
                   Culture=neutral,
                   PublicKeyToken=null"/>
      </behaviorExtensions>
    </extensions>

    <services>
      <service name="Servico.Teste">
        <endpoint address=""
                  binding="basicHttpBinding"
                  contract="Servico.Teste"
                  bindingConfiguration="Servico.Teste.customBinding0"/>
        <endpoint address="mex"
                  binding="mexHttpBinding"
                  contract="IMetadataExchange" />
      </service>
    </services>

    <bindings>
      <basicHttpBinding>
        <binding name="Servico.Teste.customBinding0">
        </binding>
      </basicHttpBinding>
    </bindings>

    <behaviors>
      <serviceBehaviors>

        <behavior name="">
          <serviceMetadata httpGetEnabled="true" />
          <serviceDebug includeExceptionDetailInFaults="true" />
        </behavior>

      </serviceBehaviors>

      <endpointBehaviors>
        <behavior name="">
          <silverlightFaults/> // TAG QUE GERA O PROBLEMA APRESENTADO ACIMA.
        </behavior>
      </endpointBehaviors>

    </behaviors>

    <serviceHostingEnvironment aspNetCompatibilityEnabled="true"
                               multipleSiteBindingsEnabled="true" />


  </system.serviceModel>

</configuration>

Como resolver tal situação, De forma ao Silverlight conseguir ententer o FaultException ?

 

Desde Já, Agradeço.

Answer 1

Bom dia Rodrigo,

 aparentemente o Silverlight não consegui identificar sua extensão. Note que no código abaixo você faz referência ao objeto Servico.SilverlightFaultBehavior:

 

    <extensions>
      <behaviorExtensions>
        <add name="silverlightFaults"
             type="Servico.SilverlightFaultBehavior,
                   Servico,
                   Version=1.0.0.0,
                   Culture=neutral,
                   PublicKeyToken=null"/>
      </behaviorExtensions>
    </extensions>

Verifique se esta classe implementa as interfaces que deveria, e se está acessível para a página em que está tentando utilizá-la.

 

Abraços,

---

Daniel Cheida de Oliveira

Answer 2

Prezado Daniel Cheida,

 

                                    Inicialmente gostaria de agradecer pela atenção, possuo um ASP.NET Empty Web Application denominado Servico e dentro do mesmo possuo a classe  SilverlightFaultBehavior, no qual postei o código abaixo para uma melhor visualização:

 

 

using System;
using System.Collections.Generic;
using System.Web;
using System.ServiceModel.Description;
using System.ServiceModel.Configuration;
using System.ServiceModel.Dispatcher;
using System.ServiceModel.Channels;
using System.ServiceModel;

namespace Servico
{
    // http://msdn.microsoft.com/en-us/library/dd470096%28VS.96%29.aspx
    public class SilverlightFaultBehavior : BehaviorExtensionElement IEndpointBehavior
    {
        public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
        {
            SilverlightFaultMessageInspector inspector = new SilverlightFaultMessageInspector();
            endpointDispatcher.DispatchRuntime.MessageInspectors.Add(inspector);
        }

        public class SilverlightFaultMessageInspector : IDispatchMessageInspector
        {
            public void BeforeSendReply(ref Message reply, object correlationState)
            {
                if (reply.IsFault)
                {
                    HttpResponseMessageProperty property = new HttpResponseMessageProperty();

                    // Here the response code is changed to 200.
                    property.StatusCode = System.Net.HttpStatusCode.OK;

                    reply.Properties[HttpResponseMessageProperty.Name] = property;
                }
            }
            public object AfterReceiveRequest(ref Message request, IClientChannel channel, InstanceContext instanceContext)
            {
                // Do nothing to the incoming message.
                return null;
            }
        }
        // The following methods are stubs and not relevant. 
        public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters) { }
        public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime) { }
        public void Validate(ServiceEndpoint endpoint) { }

        public override System.Type BehaviorType
        {
            get { return typeof(SilverlightFaultBehavior); }
        }

        protected override object CreateBehavior()
        {
            return new SilverlightFaultBehavior();
        }
    }
}

Se você observar todos os modificadores de acesso são public e a respectiva classe implementa as seguintes interfaces: BehaviorExtensionElement, IEndpointBehavior.

 

Novamente Obrigado.

Grande Abraço.

Answer 3

O problema foi resolvido, muito obrigado a todos que derão atenção ao respectivo post, segue abaixo o Web.config corrigido, isso pode ajudar alguem que esteja com o mesmo problema:

 

<?xml version="1.0"?>

<configuration>
  <system.web>
    <compilation debug="true" targetFramework="4.0" />
    <customErrors mode="Off"/>
  </system.web>

  <system.serviceModel>

    <extensions>
      <behaviorExtensions>
        <add name="silverlightFaults"
             type="Servico.SilverlightFaultBehavior, Servico, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"/>
      </behaviorExtensions>
    </extensions>

    <services>
      <service name="Servico.Teste">
        <endpoint address="" 
                  binding="customBinding" 
                  contract="Servico.Teste" 
                  behaviorConfiguration="SilverlightFaultBehavior"
                  bindingConfiguration="Servico.Teste.customBinding0" />
        <endpoint address="mex" 
                  binding="mexHttpBinding" 
                  contract="IMetadataExchange" />
      </service>
    </services>

    <bindings>
      <customBinding>
        <binding name="Servico.Teste.customBinding0">
          <textMessageEncoding />
          <httpTransport />
        </binding>
      </customBinding>
    </bindings>

    <behaviors>
      <serviceBehaviors>
        <behavior name="">
          <serviceMetadata httpGetEnabled="true" />       
          <serviceDebug includeExceptionDetailInFaults="true" />
        </behavior>
      </serviceBehaviors>
      
      <endpointBehaviors>
        <behavior name="SilverlightFaultBehavior">
          <silverlightFaults/>
        </behavior>
      </endpointBehaviors>
      
    </behaviors>

    <serviceHostingEnvironment aspNetCompatibilityEnabled="true"
        multipleSiteBindingsEnabled="true" />
    
  </system.serviceModel>
</configuration>