Wcf 异常处理抛出错误

Question

嗨，我在处理 wcf 中的异常时遇到了问题。
我有这样的服务:

[ServiceContract]
public interface IAddressService
{
    [OperationContract]
    [FaultContract(typeof(ExecuteCommandException))]
    int SavePerson(string idApp, int idUser, Person person);
}

我在 WCFTestClient 实用程序中对服务调用 SavePerson()。
SavePerson() 实现是:

public int SavePerson(string idApp, int idUser, Person person)
{
    try
    {
        this._savePersonCommand.Person = person;

        this.ExecuteCommand(idUser, idApp, this._savePersonCommand);

        return this._savePersonCommand.Person.Id;
    }
    catch (ExecuteCommandException ex)
    {
        throw new FaultException<ExecuteCommandException>(ex, new FaultReason("Error in   'SavePerson'"));
    }
}

但我收到此错误:

Failed to invoke the service. Possible causes: The service is offline or inaccessible; the client-side configuration does not match the proxy; the existing proxy is invalid. Refer to the stack trace for more detail. You can try to recover by starting a new proxy, restoring to default configuration, or refreshing the service.

如果我更改 SavePerson 方法而不是:

catch (ExecuteCommandException ex)
{
    throw new FaultException<ExecuteCommandException>(ex, new FaultReason("Error in   'SavePerson'"));
}

我愿意

catch(Exception)
{
    throw;
}

我没有收到上述错误，但我只收到异常消息而没有内部异常。
我究竟做错了什么？

Answer 1

当您定义故障契约(Contract)时:

[FaultContract(typeof(ExecuteCommandException))] 

您不得指定异常类型。相反，您可以指定您选择的数据协定来传回您认为必要的任何值。

例如:

[DataContract]
public class ExecuteCommandInfo {
    [DataMember]
    public string Message;
}

[ServiceContract]
public interface IAddressService {
    [OperationContract]
    [FaultContract(typeof(ExecuteCommandInfo))]
    int SavePerson(string idApp, int idUser, Person person);
}

catch (ExecuteCommandException ex) { 
    throw new FaultException<ExecuteCommandInfo>(new ExecuteCommandInfo { Message = ex.Message }, new FaultReason("Error in   'SavePerson'")); 
}