将数据从服务器发送回客户端

Question

我有一个TcpClient应用程序，可以将消息从客户端发送到服务器。 代码如下：

clsServer.cs

public void server_start()
    {
        this.tcpListener = new TcpListener(new IPAddress(new Byte[] { 172, 16, 1, 55 }), 9999);
        this.listenThread = new Thread(new ThreadStart(ListenForClients));

        _rtb_Input.AppendText("Listening... Press any key to stop" + System.Environment.NewLine);
        this.listenThread.Start();
    }

    private void ListenForClients()
    {
        this.tcpListener.Start();
        while (true)
        {
            //blocks until a client has connected to the server
            client = this.tcpListener.AcceptTcpClient();

            //create a thread to handle communication
            //with connected client
            Thread clientThread = new Thread(new ParameterizedThreadStart(HandleClientComm));
            clientThread.Start(client);
        }
    }

    public event MessageReceivedHandler MessageReceived;
    private void HandleClientComm(object client)
    {
        TcpClient tcpClient = (TcpClient)client;
        NetworkStream clientStream = tcpClient.GetStream();

        byte[] message = new byte[4096];
        int bytesRead;

        while (true)
        {
            bytesRead = clientStream.Read(message, 0, 4096);

            //message has successfully been received
            ASCIIEncoding encoder = new ASCIIEncoding();
            string msg = encoder.GetString(message, 0, bytesRead);
            if (this.MessageReceived != null)
            {
                this.MessageReceived(msg);
            }
            //send message back select the message from the db
            byte[] buffer = encoder.GetBytes("Hello Client!");

            clientStream.Write(buffer, 0, buffer.Length);
            clientStream.Flush();
        }
        tcpClient.Close();
    }

frmClient.cs

public frmClient()
    {
        InitializeComponent();         
    }

    private void btn_ClientStart_Click(object sender, EventArgs e)
    {
        TcpClient client = new TcpClient();

        IPEndPoint serverEndPoint = new IPEndPoint(IPAddress.Parse("172.16.1.55"), 9999);
        try
        {
            client.Connect(serverEndPoint);
            NetworkStream clientStream = client.GetStream();

            ASCIIEncoding encoder = new ASCIIEncoding();
            byte[] buffer = encoder.GetBytes(rtb_Outpot.Text);

            clientStream.Write(buffer, 0, buffer.Length);
            clientStream.Flush();
        }
        catch (Exception ex)
        {
            rtb_Outpot.AppendText(System.Environment.NewLine + "Failed To Connect to the Server" + System.Environment.NewLine);
        }
    }

frmServer.cs

private void btn_ServerStart_Click(object sender, EventArgs e)
    {
        btn_ServerStop.Enabled = true;
        btn_ServerStart.Enabled = false;
        server = new clsServer(rtb_Input);
        server.MessageReceived += new MessageReceivedHandler(Message_Received);
        server.server_start();
    }

    private void Message_Received(string message)
    {
        //update the display using invoke
        Invoke(new MessageReceivedHandler(PrintToScreen), new object[] { message });
    }

    private void PrintToScreen(string msg)
    {
        msg_counter++;
        rtb_Input.AppendText("msg no': " + msg_counter + System.Environment.NewLine + msg + System.Environment.NewLine);
    }

当我从客户端向服务器发送消息时，工作正常。 但是现在我可以找出一种将数据从服务器发送回客户端的方法。 我也需要为客户表单创建线程吗？

谢谢。

Answer 1

发布的代码看起来更像是您试图找到一种接收服务器发送的消息的方法。 clsServer.cs中的代码已经包含了将数据发送到客户端所必需的代码。

您的客户端代码只是缺少必要的调用以从clientStream读取响应。 在您的应用程序中如何实现它取决于您的要求。 就个人而言，我可能会将读数分流到另一个线程。