c# - TCP/IP 在不关闭连接的情况下连续接收消息

Question

我一直在观看以下关于如何创建 TCP/IP 连接的视频:Server 和 Client我需要做的是创建一个游戏 (flipcard)，在其中我只为矩阵发送 2 个坐标。而已。或更少。

(接下来是代码)

据我观察，他每次发送消息时都会关闭并重新打开连接。它的工作。但是，我如何修改代码以保持连接打开并检测消息何时到达？

我所有的谷歌搜索都让我找到了这两种方法:

1. I have had luck using the socket object directly (rather than the TCP client). (但我不想使用套接字)
2. Also uses sockets

当我点击启动服务器时

        private void bStartServer_Click(object sender, EventArgs e)
    {
        Thread tcpServerRunThread = new Thread(new ThreadStart(TCPServerRun));
        tcpServerRunThread.Start();
    }

服务器运行并等待连接

    private void TCPServerRun()
    {
        TcpListener tcpListener = new TcpListener(IPAddress.Any, 2016);
        tcpListener.Start();
        updateUI("Listening");
        while (true)
        {

            TcpClient client = tcpListener.AcceptTcpClient();
            updateUI("Connected");
            Thread tcpHandlerThread = new Thread(new ParameterizedThreadStart(tcpHandler));
            tcpHandlerThread.Start(client);
        }
    }

我处理我的消息

    private void tcpHandler(object client)
    {
        TcpListener tcpListener = new TcpListener(IPAddress.Any, 5004);
        TcpClient mClient = (TcpClient)client;
        NetworkStream stream =  mClient.GetStream();
        byte[] message = new byte[1024];
        stream.Read(message,0, message.Length);
        updateUI("New message = " + Encoding.ASCII.GetString(message));
        stream.Close();
        mClient.Close();
   } 

注意:updateUI是他做的更新列表框项的函数

客户端 - 几乎像服务器端 `private void button1_Click(object sender, EventArgs e) { 线程 mThread = new Thread(new ThreadStart(ConnectAsClient)); mThread.Start();

    private void ConnectAsClient()
    {
        //                 aici putem inlocui cu adresa de IP dorita             
        //client.Connect(IPAddress.Parse(textBox.Text), 5004);
        client = new TcpClient();
        //client.Connect(IPAddress.Parse("127.0.0.1"), 2016);     // for when I'm not connected to network
        client.Connect(IPAddress.Parse("my_ip_here"), 2016);   // for when I am connected to the network
        updateUI("connected");
        NetworkStream stream = client.GetStream();
        string s = "Hello world!";
        byte[] message = Encoding.ASCII.GetBytes(s);
        stream.Write(message, 0, message.Length);
        this.updateUI("Message sent!");
       stream.Close();
       // client.Close();
    }`

如果我没记错的话，每次他再次连接时，他都会创建一个新连接，而不是打开旧连接，对吗？(我是第一次使用TCP/IP，自学，所以如果可能我宁愿不使用套接字)

-------------------------------------------- --------------------------

我的代码的完整链接(根据开头提供的视频稍作修改):

1. TCPClient
2. TCPServer

Answer 1

您每次发送消息时都会重新连接。为此使用两种不同的方法；一个用于连接到服务器，然后另一个用于实际发送消息。像这样:

TcpClient client;
private void ConnectAsClient()
{           
    //client.Connect(IPAddress.Parse(textBox.Text), 5004);
    client = new TcpClient();
    //client.Connect(IPAddress.Parse("127.0.0.1"), 2016);
    client.Connect(IPAddress.Parse("my_ip_here"), 2016);
    updateUI("connected");
}
void SendMessage()
{
    NetworkStream stream = client.GetStream();
    string s = "Hello world!";
    byte[] message = Encoding.ASCII.GetBytes(s);
    stream.Write(message, 0, message.Length);
    this.updateUI("Message sent!");
}