我在 winform 中使用 wcf 代理时遇到了一些问题。这个 wcf 服务托管在 IIS 上，公开了 2 种方法，并且当我在单线程 winform 中使用它时（一次调用一个），它可以正常工作。当我在不同的线程中使用相同的代理（相同的实例或 2 个单独的实例，没关系）时出现问题，我确实收到错误：“安全句柄已关闭”。
我真正不明白的是：如果我启动一些都调用相同的 wcf 方法的线程，它工作正常。仅当我开始调用其中一个 wcf 方法，开始另一个调用第二个 wcf 方法并且第二个调用在第一个调用完成之前完成时，才会出现此问题。澄清：
This will work:
- start threadA that calls wcf MethodA
- start threadB that calls wcf MethodA
- MethodA in threadA finishes <-- No errors
- MethodA in threadB finishes <-- No errors
This won't work:
- start threadA that calls wcf MethodA
- start threadB that calls wcf MethodB
- MethodB in threadB finishes <-- No errors
- MethodA in threadA finishes <-- Error "Safe handle has been closed"
This won't work either, methods order doesn't matter, only the fact that I mix methods it seems:
- start threadA that calls wcf MethodB
- start threadB that calls wcf MethodA
- MethodA in threadB finishes <-- No errors
- MethodB in threadA finishes <-- Error "Safe handle has been closed"
这是我收到的堆栈：
Server stack trace:
at System.ServiceModel.Channels.ServiceChannel.ThrowIfFaultUnderstood(Message reply, MessageFault fault, String action, MessageVersion version, FaultConverter faultConverter)
at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)
Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at MyProxy.MyInterface.MyMethod(String myParam)
有人有解释吗？