Question

我和我的朋友正在两台不同的计算机上制作基本的客户端/服务器应用程序。我们要做的是：

1.我给他发了一个字符串（作为服务器）

2他送回我另一个字符串，

我编辑并发回。

但每次我们到达第3部分他都不会回复我的软件只是停止工作并通过调试我最终会

"{"A request to send or receive data was disallowed because the socket had already been shut down in that direction with a previous shutdown call"}

我很确定故障是在我的最后，这是我正在使用的功能：

private static void SendCallback(IAsyncResult ar)
{
    try
    {
        // Retrieve the socket from the state object.
        Socket handler = (Socket)ar.AsyncState;

        // Complete sending the data to the remote device.
        int bytesSent = handler.EndSend(ar);
        Console.WriteLine("Sent {0} bytes to client.", bytesSent);

        handler.Shutdown(SocketShutdown.Both);
        //  handler.Close();
        sendDone.Set();

    }
    catch (Exception e)
    {
        Console.WriteLine(e.ToString());
    }
}

private static void Send(Socket handler, String data)
{
    // Convert the string data to byte data using ASCII encoding.
    byte[] byteData = Encoding.ASCII.GetBytes(data);

    // Begin sending the data to the remote device.
    handler.BeginSend(byteData, 0, byteData.Length, 0,
        new AsyncCallback(SendCallback), handler);
}

private static void Receive(Socket client)
{
    try
    {
        // Create the state object.
        StateObject state = new StateObject();
        state.workSocket = client;

        // Begin receiving the data from the remote device.
        client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
            new AsyncCallback(ReceiveCallback), state);
    }
    catch (Exception e)
    {
        Console.WriteLine(e.ToString());
    }
}
private static void ReceiveCallback(IAsyncResult ar)
{
    try
    {
        // Retrieve the state object and the client socket 
        // from the asynchronous state object.
        StateObject state = (StateObject)ar.AsyncState;
       // Socket client = state.workSocket;

        // Read data from the remote device.
        int bytesRead = s.EndReceive(ar);

        if (bytesRead > 0)
        {
            // There might be more data, so store the data received so far.
            state.sb.Append(Encoding.ASCII.GetString(state.buffer, 0, bytesRead));

            // Get the rest of the data.
            s.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
                new AsyncCallback(ReceiveCallback), state);
        }
        else
        {
            // All the data has arrived; put it in response.

            if (state.sb.Length > 1)
            {
                response = state.sb.ToString();
            }
            // Signal that all bytes have been received.
            receiveDone.Set();
        }
    }
    catch (Exception e)
    {
        Console.WriteLine(e.ToString());
    }
}

我通过

  IPAddress ipAd = IPAddress.Parse("my_actual_ip_adress");
        // use local m/c IP address, and 
        // use the same in the client

        /* Initializes the Listener */
        TcpListener myList = new TcpListener(ipAd, 8001);

        /* Start Listeneting at the specified port */
        myList.Start();

我意识到这可能听起来像是一个愚蠢的问题，但我们很难找到实际的解决方案，任何帮助都会让我非常感激

Answer 1

我设法解决了！原来我们需要摆脱handler.Shutdown（SocketShutdown.Both），然后改变客户端接收数据的方式，因为他正在等待套接字关闭。
- 一些

C＃ - 通过套接字

1 个答案: