WCF故障处理

Question

问如何在客户端获取原始异常（在服务器上发生）？

我正在使用自托管的WCF服务和C＃4，并尝试设置正确的异常处理。

我有一个看起来像这样的客户端

private ServiceResponse PerformRemoteAction(ServiceRequest request, ProcessOperations operation)
{
    ...    
    try
    {
        //remote call
        switch (operation)
        {
            ...
            case ProcessOperations.VerifyAction: { response = client.VerifyAction(request); break; } 

            default: throw new NotImplementedException();
        }
    }
    catch (Exception ex)
    {
        AppManager.LogException(ex);
    }

    return response;
}

服务实施

public override ServiceResponse VerifyAction(ServiceRequest request)
{
    RegisterRequest(request);

    try
    {
        var chain = new VerificationChain();
        Responce = chain.Run(request);
    }
    catch (Exception ex)
    {
        throw new FaultException<WcfException>(ExceptionFactory.Create(ex),
            new FaultReason(ex.Message));
    }

    SetSuccessfulResponce();

    return Responce;
}

服务web.config有

<behaviors>
    <serviceBehaviors>
        <behavior>
            <serviceDebug includeExceptionDetailInFaults="true" />
        </behavior>
    </serviceBehaviors>
</behaviors>

这是我原来的例外

这就是我在客户端上发现的

如果需要，我可以在客户端发布完整的详细信息，但是客户端上的例外没有任何对原始版本的引用。

更新
这是我定义的 FaultContractAttribute

的界面

[ServiceContract]
public interface IServiceOperation : IOperation
{
    ...
    [OperationContract(Action = "http://tempuri.org/ITestRunnerService/VerifyAction", ReplyAction = "http://tempuri.org/ITestRunnerService/VerifyAction")]
    [FaultContractAttribute(typeof(WcfException), Action = "http://tempuri.org/ITestRunnerService/ExecuteRequestWcfExceptionFault", Name = "WcfException", Namespace = "http://schemas.datacontract.org/2004/07/TH.Core.Exceptions")]
    ServiceResponse VerifyAction(ServiceRequest request);
}

这是我的 WcfException 类

[DataContract]
public class WcfException : Exception
{
    [DataMember]
    public string Title { get; set; }

    [DataMember]
    public new string Message { get; set; }

    [DataMember]
    public new string InnerException { get; set; }

    [DataMember]
    public new string StackTrace { get; set; }
}

Answer 1

您是否尝试过捕获FaultException？

catch (FaultException<WcfException> ex)
{
   AppManager.LogException(ex);
}
catch (FaultException unknownFault)
{
   AppManager.LogException(unknownFault);
}

您需要在合同中加入FaultContractAttribute才能实现此目的。

Answer 2

什么是WcfException，是否可序列化？

在任何情况下，我建议您按照this MSDN article中的说明在服务器上启用跟踪 - 这可以帮助您诊断问题。

Answer 3

如果您想获得有关原始异常的信息，则可以使用：

<behaviors>
    <serviceBehaviors>
        <behavior>
            <serviceDebug includeExceptionDetailInFaults="true" />
        </behavior>
    </serviceBehaviors>
</behaviors>

Answer 4

感谢您的所有答案。我的问题出在服务界面，即 FaultContractAttribute 的 Action 属性中，它指向错误的URL。

[ServiceContract]
public interface IServiceOperation : IOperation
{
    ...
    [OperationContract(Action = "http://tempuri.org/IServiceOperation/VerifyAction", ReplyAction = "http://tempuri.org/IServiceOperation/VerifyAction")]
    [FaultContractAttribute(typeof(WcfException), Action = "http://tempuri.org/IServiceOperation/ExecuteRequestWcfExceptionFault", Name = "WcfException", Namespace = "http://schemas.datacontract.org/2004/07/TH.Core.Exceptions")]
    ServiceResponse VerifyAction(ServiceRequest request);
}

我通过删除所有其他属性（自动确定）并仅保留WcfFault的类型来解决它

[ServiceContract]
    public interface IServiceOperation : IOperation
    {
        ...
        [OperationContract(Action = "http://tempuri.org/IServiceOperation/VerifyAction", ReplyAction = "http://tempuri.org/IServiceOperation/VerifyAction")]
        [FaultContractAttribute(typeof(WcfException))]
        ServiceResponse VerifyAction(ServiceRequest request);
    }