作为服务运行时C#Pipe OperationCanceledException

时间:2011-11-03 23:47:27

标签: c# exception service pipe

我正在开发一个Windows服务应用程序,我遇到了有关命名管道服务器的问题。 服务应用程序具有命名管道服务,以便GUI与其通信 - 并且GUI具有命名管道客户端。

当我运行我的应用程序的控制台版本(相同的代码但在控制台项目中初始化)时,一切正常,但是当我运行应用程序的服务版本时(使用安装项目或使用VS unistallUtil.exe安装)我收到这个错误:

System.OperationCanceledException: The operation was canceled.
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.Pipes.NamedPipeServerStream.EndWaitForConnection(IAsyncResult asyncResult)
   at Common.PipeCommunication.SomePipeServer.ClientConnected(IAsyncResult ar) in SomePipeServer.cs:line 80

启动服务时出现此错误,甚至没有尝试将客户端连接到服务。这是我的PipeServer类:

public class SomePipeServer
{

    #region PRIVATE VARIABLES
    private string                  _pipeName = "SomePipeServer";
    private NamedPipeServerStream   _pipeServer;
    private IAsyncResult            _connectRequest;
    private byte[] oBuffer;  
    #endregion


    #region PUBLIC VARIABLES
    public event EventHandler MsgReceived;
    #endregion


    #region PUBLIC METHODS
    public SomePipeServer()
    {
        oBuffer = new byte[4096]; 
    }

    public void Start() 
    {
        try
        {
            _pipeServer = new NamedPipeServerStream(
                _pipeName, PipeDirection.InOut, -1,
                PipeTransmissionMode.Message,
                PipeOptions.Asynchronous);

            _connectRequest = _pipeServer.BeginWaitForConnection(
                ClientConnected, null);
        }
        catch (Exception ex)
        {
            ...
        }
    }
    public void Stop()
    {
        try
        {
            _connectRequest = null;

            if (_pipeServer == null)
                return;

            if (_pipeServer.IsConnected)
                _pipeServer.Disconnect();

            //_pipeServer.Close();
        }
        catch (Exception ex)
        {
            ...
        }
    }
    #endregion


    #region PRIVATE METHODS
    private void ClientConnected(IAsyncResult ar)
    {
        try
        {
            if (ar != null)
            {
                _pipeServer.EndWaitForConnection(ar); //line 80
                _connectRequest = null;
                _connectRequest = _pipeServer.BeginRead(oBuffer, 0, 4096,
                    ClientMessage, null);

            }
        }
        catch (Exception ex)
        {
            ...
        }
    }
    private void ClientMessage(IAsyncResult ar)
    {
        try
        {
            if (ar != null)
            {
                _pipeServer.EndRead(ar);

                string message = System.Text.ASCIIEncoding.ASCII.GetString(oBuffer).Trim(new char[] { '\0', ' ' });
                message = message.Replace(Environment.NewLine, " ").TrimEnd();

                OnReceive(message);

                _connectRequest = null;
                //_connectRequest = _pipeServer.BeginRead(oBuffer, 0, 4096,
                //    new AsyncCallback(ClientMessage), null);

                //_pipeServer.Disconnect();
                //_pipeServer.BeginWaitForConnection(ClientConnected, null);
                Stop();
                Start();
            }
        }
        catch (Exception ex)
        {
            ...
        }
    }
    private void OnReceive(string in_msg)
    {
        if (MsgReceived != null)
        {
            MsgReceived(in_msg, EventArgs.Empty);
        }
    }
    #endregion
}

1 个答案:

答案 0 :(得分:0)

关于({3}}关于(我所理解的)与你有同样问题的讨论。

  

Windows将为已退出的线程完成所有重叠的I / O,并使用ERROR_OPERATION_ABORTED。

     

IAsyncResult并不一定意味着重叠的I / O,但它是一个   自然适合,它似乎是命名管道使用的方法。

     

在这种情况下,我建议让主线程创建   命名管道;这对于命名管道服务器来说是正常的(具有单独的管道服   线程只是为了创建命名管道而不是)。