Question

我很困惑。我有命名管道的客户端/服务器结构，问题是在一些随机点，经过一段时间的工作后它只挂在streamReader.ReadLine（）; 它只是停止，而不是更进一步。我很困惑，我根本不知道，发生了什么，实际上如何调试，为什么以及什么时候发生。有什么想法吗？

客户端有时会这样做：

   private void Connect()
    {
        stream = new NamedPipeClientStream(".", "MP9", PipeDirection.InOut);
        try
        {
            stream.Connect(120);
        }
        catch (Exception e)
        {
            run = false;
            return;
        }

        //Initialising Readers/Writers
        sr = new StreamReader(stream);
        sw = new StreamWriter(stream);
    }

private string SendMessage(string msg)
{
    Debug.WriteLine("Will listen for message " + msg);

    string msgFrom = "";
    if (run)
    {
        string toReturn = "";
        lock (locker)
        {

            sw.WriteLine(msg); //Writing command to the pipes
            stream.WaitForPipeDrain(); //Waiting for another process to read the command
            msgFrom = sr.ReadLine(); //Reading
        }
    }
    return msgFrom;
}

我的服务器有一个线程，可以侦听任何消息，并在需要时作出响应。运行X小时后，它将停在ReadLine，没有错误。只是停在线上，而不是更进一步。然而，应用程序仍在运行，它没有被绞死，只是这个监听器线程似乎被绞死......

void Listen()
{
    try
    {
        stream.WaitForConnection();
        sw.AutoFlush = true;
        string messageTo = "";
        while (running) //Main loop of the thread
        {
            messageFrom = "";
            //HERE IT CAN JUST HANG AND NOT GO FURTHER....
            messageFrom = sr.ReadLine(); //Reading

            //populate message to with data, if is needed to respond

            sw.WriteLine(messageTo);
            stream.WaitForPipeDrain();
        }
    }
 }

Answer 1

如果您阅读了所有数据，这似乎就会发生。

如果你做了一个＆＃34; Peek（）＆＃34;在你读到之前检查一个大于0的值应该可以解决这个问题。

stream.WaitForConnection();
    sw.AutoFlush = true;
    string messageTo = "";
    while (running) //Main loop of the thread
    {
        messageFrom = "";
        if(sr.Peek() > 0)
        {
           messageFrom = sr.ReadLine(); //Reading

          //populate message to with data, if is needed to respond

           sw.WriteLine(messageTo);
        }
        stream.WaitForPipeDrain();

C＃命名管道流readline挂起

1 个答案: