我一直在寻找这个地方,我似乎无法找到答案。我有一个使用IParameterInspector的扩展端点行为。如何在BeforeCall方法中抛出异常?
我尝试将try-catch添加到IEndPointBehavior和BehaviorExtensionElement,它们都没有处理它。这是一些代码:
BehaviorExtensionElement:
public class ExtensionService : BehaviorExtensionElement
{
protected override object CreateBehavior()
{
//try-catch doesn't work here
return new ExtensionBehavior();
}
public override Type BehaviorType
{
get { return typeof(ExtensionBehavior); }
}
}
IEndpointBehavior:
public class ExtensionBehavior : IEndpointBehavior
{
public void AddBindingParameters(ServiceEndpoint endpoint, System.ServiceModel.Channels.BindingParameterCollection bindingParameters)
{
//throw new NotImplementedException();
}
public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
{
foreach (ClientOperation clientOperation in clientRuntime.ClientOperations)
{
//try-catch here doesn't work
clientOperation.ClientParameterInspectors.Add(new ParamInspector());
}
}
public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
{
foreach (DispatchOperation dispatchOperation in endpointDispatcher.DispatchRuntime.Operations)
{
//try-catch here doesn't work
dispatchOperation.ParameterInspectors.Add(new ParamInspector());
}
}
public void Validate(ServiceEndpoint endpoint)
{
//throw new NotImplementedException();
}
}
IParameterInspector
public class ParamInspector : IParameterInspector
{
public void AfterCall(string operationName, object[] outputs, object returnValue, object correlationState)
{
}
public object BeforeCall(string operationName, object[] inputs)
{
///an exception is thrown here
return null;
}
}
答案 0 :(得分:2)
我终于设法解决了这个问题。我必须像这样实现IErrorHandler:
public class CustomErrorHandler : IErrorHandler
{
public bool HandleError(Exception error)
{
//the procedure for handling the errors.
//False is returned because every time we have an exception we want to abort the session.
return false;
}
public void ProvideFault(Exception error, System.ServiceModel.Channels.MessageVersion version, ref System.ServiceModel.Channels.Message fault)
{
}
}
然后将此IErrorHandler添加到ApplyDispatchBehavior
public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
{
foreach (DispatchOperation dispatchOperation in endpointDispatcher.DispatchRuntime.Operations)
{
dispatchOperation.ParameterInspectors.Add(new ParamInspector(this.Class));
}
endpointDispatcher.ChannelDispatcher.ErrorHandlers.Add(new CustomErrorHandler());
}