我有一个定义 FaultContract 的 WCF 服务:
[OperationContract]
[FaultContract(typeof(InvalidOperationException))]
[FaultContract(typeof(NotSupportedException))]
[FaultContract(typeof(Exception))]
GetSysIdsResponse GetSysIds(string id);
WCF 服务捕获异常情况(空指针异常)并抛出我的 FaultException:
try
{
....
} }
catch (InvalidOperationException ex)
{
// The specified DirectoryEntry is not a container
throw new FaultException<InvalidOperationException>(ex);
}
catch (NotSupportedException ex)
{
// Search is not supported by the provider that is being used
throw new FaultException<NotSupportedException>(ex);
}
catch (Exception ex)
{
throw new FaultException<Exception>(ex);
}
它抛出最后一个。问题是它永远不会到达客户端。首先,“故障契约作为服务元数据的一部分发布”。添加服务参考后,我没有在客户端元数据中看到它。这是客户端代码。它永远不会碰到 catch 块 catch (FaultException e) 它只是说用户没有捕获到 FaultException。它确实捕获了 CommunicationException。我不知道我做错了什么?
try
{
response = client.GetSysIds("sgentil");
}
catch (FaultException<Exception> e)
{
Console.WriteLine("FaultException<Exception>: " + e.Detail);
client.Abort();
return;
}
catch (FaultException e)
{
Console.WriteLine("FaultException: " + e.Message);
client.Abort();
return;
}
catch (CommunicationException ex)
{
Console.WriteLine("CommunicationsException");
client.Abort();
return;
}
** 我尝试了第一个答案的方法并定义了两个例外:
[DataContract]
public class SystemFault
{
[DataMember]
public string SystemOperation { get; set; }
[DataMember]
public string SystemReason { get; set; }
[DataMember]
public string SystemMessage { get; set; }
}
[DataContract]
public class DatabaseFault
{
[DataMember]
public string DbOperation { get; set; }
[DataMember]
public string DbReason { get; set; }
[DataMember]
public string DbMessage { get; set; }
}
然后我应用了它:
[FaultContract(typeof(SystemFault))]
GetSysIdsResponse GetSysIds(string id);
然后扔了:
catch (Exception ex)
{
SystemFault sf = new SystemFault
{
SystemOperation = "GetSystemIds",
SystemMessage = "Exception while obtaining AD user properties",
SystemReason = ex.Message
};
throw new FaultException<SystemFault>(sf);
}
客户端现在可以看到 SystemFault 类型并具有该元数据:
catch(FaultException<SystemFault> sf)
{
Console.WriteLine("SystemFault {0}: {1}\n{2}",
sf.Detail.SystemOperation, sf.Detail.SystemMessage,
sf.Detail.SystemReason);
}
然而,执行仍然在该行的服务器中停止:
throw new FaultException<SystemFault>(sf);
它说:用户代码未处理 FaultException'1
怎么办?