winform tcp demo

以下是一个基本的 WinForm TCP 示例，它演示了如何使用 C# 中的 TcpListener 和 TcpClient 类建立一个简单的服务器和客户端：

服务器：

using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ServerDemo
{
    public partial class Form1 : Form
    {
        private TcpListener listener;
        private TcpClient client;

        public Form1()
        {
            InitializeComponent();
        }

        private async void btnStart_Click(object sender, EventArgs e)
        {
            listener = new TcpListener(IPAddress.Parse(txtHost.Text), int.Parse(txtPort.Text));
            listener.Start();
            AddLog("Server started.");

            client = await listener.AcceptTcpClientAsync();
            AddLog("Client connected.");

            var stream = client.GetStream();

            while (true)
            {
                byte[] buffer = new byte[1024];
                int bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length);
                string message = Encoding.UTF8.GetString(buffer, 0, bytesRead);
                AddLog($"Received: {message}");

                byte[] response = Encoding.UTF8.GetBytes($"Server received: {message}");
                await stream.WriteAsync(response, 0, response.Length);
            }
        }

        private void AddLog(string message)
        {
            txtLog.AppendText($"{message}\r\n");
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            listener?.Stop();
            client?.Close();
        }
    }
}

客户端：

using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ClientDemo
{
    public partial class Form1 : Form
    {
        private TcpClient client;

        public Form1()
        {
            InitializeComponent();
        }

        private async void btnConnect_Click(object sender, EventArgs e)
        {
            client = new TcpClient();
            await client.ConnectAsync(txtHost.Text, int.Parse(txtPort.Text));
            AddLog("Connected to server.");

            var stream = client.GetStream();

            while (true)
            {
                string message = txtMessage.Text;
                byte[] buffer = Encoding.UTF8.GetBytes(message);
                await stream.WriteAsync(buffer, 0, buffer.Length);
                AddLog($"Sent: {message}");

                buffer = new byte[1024];
                int bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length);
                message = Encoding.UTF8.GetString(buffer, 0, bytesRead);
                AddLog($"Received: {message}");
            }
        }

        private void AddLog(string message)
        {
            txtLog.AppendText($"{message}\r\n");
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            client?.Close();
        }
    }
}

上述示例仅供参考，实际应用中需要根据具体需求进行修改。