Silverlight处理wcf异常

1：新增一个类SilverlightFaultBehavior,代码如下

 public class SilverlightFaultBehavior : Attribute, IServiceBehavior
    {
        private class SilverlightFaultEndpointBehavior : IEndpointBehavior
        {
            public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters)
            {
            }

            public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
            {
            }

            public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
            {

                endpointDispatcher.ChannelDispatcher.ErrorHandlers.Add(new ErrorHandler());
                endpointDispatcher.DispatchRuntime.MessageInspectors.Add(new SilverlightFaultMessageInspector());
            }

            public void Validate(ServiceEndpoint endpoint)
            {
            }

            private class SilverlightFaultMessageInspector : IDispatchMessageInspector
            {
                public object AfterReceiveRequest(ref Message request, IClientChannel channel, InstanceContext instanceContext)
                {
                    return null;
                }

                public void BeforeSendReply(ref Message reply, object correlationState)
                {
                    if ((reply != null) && reply.IsFault)
                    {
                        HttpResponseMessageProperty property = new HttpResponseMessageProperty();
                        property.StatusCode = HttpStatusCode.OK;
                        reply.Properties[HttpResponseMessageProperty.Name] = property;
                    }
                }
            }
        }

        public void AddBindingParameters(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase, Collection<ServiceEndpoint> endpoints, BindingParameterCollection bindingParameters)
        {
        }

        public void ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
        {
            foreach (ServiceEndpoint endpoint in serviceDescription.Endpoints)
            {
                endpoint.Behaviors.Add(new SilverlightFaultEndpointBehavior());
            }
        }

        public void Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
        {
        }
    }
    public class ErrorHandler : IErrorHandler
    {
        public bool HandleError(System.Exception error)
        {
            return true;
        }

        public void ProvideFault(System.Exception error, MessageVersion version, ref Message fault)
        {
            //Log處理
            StreamWriter streamwriter = new StreamWriter(@"D:log.txt");
            streamwriter.Write(error.Message);
            streamwriter.Close();
        }
    }

2：在配置文件中

<system.serviceModel>
    <extensions>
      <behaviorExtensions>
        <add name="silverlightFaults"  type="ERPAssist.Services.Library.SilverlightFaultBehavior,ERPAssist.Services.Library,Version=1.0.0.0, Culture=neutral,PublicKeyToken=null"/>
      </behaviorExtensions>
    </extensions>
    <bindings>
      <basicHttpBinding>
        <binding maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647" maxBufferSize="2147483647">
          <readerQuotas maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxDepth="2147483647" maxNameTableCharCount="2147483647" maxStringContentLength="2147483647"/>
        </binding>
      </basicHttpBinding>
    </bindings>
    <behaviors>
      <endpointBehaviors>
        <behavior name="silverlightFaults"></behavior>
      </endpointBehaviors>
      <serviceBehaviors>
        <behavior>
          <serviceMetadata httpGetEnabled="true" />
          <serviceDebug includeExceptionDetailInFaults="true" />
          <dataContractSerializer maxItemsInObjectGraph="2147483647" />
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true">
      <serviceActivations>
        <add relativeAddress="Services/IBarCodeContract.svc" service="ERPAssist.Services.BarCodeContract" />
      </serviceActivations>
      <baseAddressPrefixFilters />
    </serviceHostingEnvironment>
  </system.serviceModel>

3：在wcf服务接口的实现类中加入 [SilverlightFaultBehavior]类特性

4：在客户端即可直接捕捉异常，并且会把记录些到D盘