c# - サーバー クライアントは単純なテキストを送受信します

Question

サーバーとクライアントの間で単純な文字列を送受信するアプリケーションを構築する宿題があります。接続を確立する方法は知っていますが、文字列を送受信する方法がわかりません。これは私のコードです:

public partial class Form1 : Form
{
    private Thread n_server;
    private Thread n_client;
    private Thread n_send_server;
    private TcpClient client;
    private TcpListener listener;
    private int port = 2222;
    private string IP = " ";
    private Socket socket;
    public Form1()
    {
        InitializeComponent();
    }

    private void exitToolStripMenuItem_Click(object sender, EventArgs e)
    {
        Application.Exit();
    }

    public void Server()
    {
        listener = new TcpListener(IPAddress.Any, port);
        listener.Start();
        try
        {
            socket = listener.AcceptSocket();
            if (socket.Connected)
            {
                textBox2.Invoke((MethodInvoker)delegate { textBox2.Text = "Client : " + socket.RemoteEndPoint.ToString(); });
            }
        }
        catch
        {
        }
    }

    public void Client()
    {
        IP = "localhost";
        client = new TcpClient();
        try
        {
            client.Connect(IP, port);
        }

        catch (Exception ex)
        {
            MessageBox.Show("Error : " + ex.Message);
        }

        if (client.Connected)
        {
            textBox3.Invoke((MethodInvoker)delegate { textBox3.Text = "Connected..."; });

        }
    }

    private void button1_Click(object sender, EventArgs e)
    {
        n_server = new Thread(new ThreadStart(Server)); 
        n_server.IsBackground = true;
        n_server.Start();
        textBox1.Text = "Server up";
    }

    private void button2_Click(object sender, EventArgs e)
    {
        n_client = new Thread(new ThreadStart(Client));
        n_client.IsBackground = true;
        n_client.Start();
    }

    private void send()
    {
        // I want to use this method for both buttons : "send button" on server side    and "send button"
        // on client side. First I read text from textbox2 on server side or textbox3
        // on client side than accept and write the string to label2(s) or label3(c).
        // 
    }


    private void button3_Click(object sender, EventArgs e)
    {
        n_send_server = new Thread(new ThreadStart(send));
        n_send_server.IsBackground = true;
        n_send_server.Start();
    }
}

Answer 1

次のコードは、サーバーとの間で現在の日付と時刻を送受信します

//次のコードはサーバー アプリケーション用です。

namespace Server
{
    class Program
    {
        const int PORT_NO = 5000;
        const string SERVER_IP = "127.0.0.1";

        static void Main(string[] args)
        {
            //---listen at the specified IP and port no.---
            IPAddress localAdd = IPAddress.Parse(SERVER_IP);
            TcpListener listener = new TcpListener(localAdd, PORT_NO);
            Console.WriteLine("Listening...");
            listener.Start();

            //---incoming client connected---
            TcpClient client = listener.AcceptTcpClient();

            //---get the incoming data through a network stream---
            NetworkStream nwStream = client.GetStream();
            byte[] buffer = new byte[client.ReceiveBufferSize];

            //---read incoming stream---
            int bytesRead = nwStream.Read(buffer, 0, client.ReceiveBufferSize);

            //---convert the data received into a string---
            string dataReceived = Encoding.ASCII.GetString(buffer, 0, bytesRead);
            Console.WriteLine("Received : " + dataReceived);

            //---write back the text to the client---
            Console.WriteLine("Sending back : " + dataReceived);
            nwStream.Write(buffer, 0, bytesRead);
            client.Close();
            listener.Stop();
            Console.ReadLine();
        }
    }
}

//これはクライアントのコードです

namespace Client
{
    class Program
    {
        const int PORT_NO = 5000;
        const string SERVER_IP = "127.0.0.1";
        static void Main(string[] args)
        {
            //---data to send to the server---
            string textToSend = DateTime.Now.ToString();

            //---create a TCPClient object at the IP and port no.---
            TcpClient client = new TcpClient(SERVER_IP, PORT_NO);
            NetworkStream nwStream = client.GetStream();
            byte[] bytesToSend = ASCIIEncoding.ASCII.GetBytes(textToSend);

            //---send the text---
            Console.WriteLine("Sending : " + textToSend);
            nwStream.Write(bytesToSend, 0, bytesToSend.Length);

            //---read back the text---
            byte[] bytesToRead = new byte[client.ReceiveBufferSize];
            int bytesRead = nwStream.Read(bytesToRead, 0, client.ReceiveBufferSize);
            Console.WriteLine("Received : " + Encoding.ASCII.GetString(bytesToRead, 0, bytesRead));
            Console.ReadLine();
            client.Close();
        }
    }
}

Answer 2

bool SendReceiveTCP(string ipAddress, string sendMsg, ref string recMsg)
    {
        try
        {
            DateTime startTime=new DateTime();
            TcpClient clt = new TcpClient();
            clt.Connect(ipAddress, 8001);
            NetworkStream nts = clt.GetStream();
            nts.Write(Encoding.ASCII.GetBytes(sendMsg),0, sendMsg.Length);
            startTime = DateTime.Now;
            while (true)
            {
                if (nts.DataAvailable)
                {
                    byte[] tmpBuff = new byte[1024];
                    System.Threading.Thread.Sleep(100);
                    int readOut=nts.Read(tmpBuff, 0, 1024);
                    if (readOut > 0)
                    {
                        recMsg = Encoding.ASCII.GetString(tmpBuff, 0, readOut);
                        nts.Close();
                        clt.Close();
                        return true;
                    }
                    else
                    {
                        nts.Close();
                        clt.Close();
                        return false;
                    }
                }
                TimeSpan tps = DateTime.Now - startTime;
                if (tps.TotalMilliseconds > 2000)
                {
                    nts.Close();
                    clt.Close();
                    return false;
                }
                System.Threading.Thread.Sleep(50);
            }
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }