在回调调用时服务器没有处理FaultException

时间:2014-08-24 16:49:31

标签: c# .net wcf faultexception communicationexception

我遇到服务器从客户端请求信息的情况。

回调声明:

public interface IControlServiceCallback
{
    [...]

    [OperationContract]
    [FaultContract(typeof(GetSystemFilesFault))]
    List<SystemFile> GetSystemFiles(string directory);
}

回调实施:

public List<SystemFile> GetSystemFiles(string directory)
{
    try
    {
        var files = Directory.GetDirectories(directory)
                             .Select(x => new DirectoryInfo(x))
                             .Select(x => new SystemFile(x)).ToList();

        files.AddRange(Directory.GetFiles(directory)
                                .Select(x => new FileInfo(x))
                                .Select(x => new SystemFile(x)));

        return files;
    }
    catch (UnauthorizedAccessException e)
    {
        throw new FaultException<GetSystemFilesFault>(new GetSystemFilesFault(e));
    }
    catch (Exception e)
    {
        throw new FaultException<GetSystemFilesFault>(new GetSystemFilesFault(e));
    }
}

问题在于,当我进行调用时,执行该方法并在客户端抛出FaultException<TDetail>,异常处理不正确。我得到一个CommunicationException。如下图所示。

enter image description here

我尝试使用一些WCF日志记录功能来查看是否可以隔离问题,但是一旦服务器收到响应就会抛出异常。

Server stack trace: 
   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&amp;amp; msgData, Int32 type)
   at RemoteControl.Service.IControlServiceCallback.GetSystemFiles(String directory)
   at RemoteControl.Service.Objects.Handling.ControlServiceCallbackProxy.GetSystemFiles(String directory) in c:\Users\Bruno\Source\Repos\RemoteControl\RemoteControl\RemoteControl.Service\Objects\Handling\ControlServiceCallbackProxy.cs:line 46
   at RemoteControl.Host.Controllers.ClientController.SelectedDirectoryChanged(String path) in c:\Users\Bruno\Source\Repos\RemoteControl\RemoteControl\RemoteControl.Host\Controllers\ClientController.cs:line 41
   at RemoteControl.Host.Forms.ClientForm.treeList_DoubleClick(Object sender, EventArgs e) in c:\Users\Bruno\Source\Repos\RemoteControl\RemoteControl\RemoteControl.Host\Forms\ClientForm.cs:line 95

可能导致此行为的原因是什么?我的代码不应该进入catch (FaultException<FaultBase> e)块吗?

最重要的是,我怎么能找到这个问题?

编辑:

我刚刚发现,只要回调方法返回void,就会正确捕获异常。它可能与我的回调设置有关。

0 个答案:

没有答案