visual studio tcp服务器端怎么写

Visual Studio中创建TCP服务器的基本步骤如下：

1. **项目设置**：
- 打开Visual Studio，选择"新建项目" -> "控制台应用(C#)"。
- 右键点击项目->添加新的类(TCP服务)。

2. **代码编写**：

   using System;
   using System.Net;
   using System.Net.Sockets;
   using System.Text;

   class TcpServer
   {
       private static TcpListener server;
       private const int PORT = <你需要监听的端口>;

       public static void StartServer()
       {
           try
           {
               // 创建TCP服务器监听器
               server = new TcpListener(IPAddress.Any, PORT);
               server.Start();

               Console.WriteLine($"TCP Server is listening on port {PORT}...");

               // 监听客户端连接并处理请求
               while (true)
               {
                   // 等待新连接
                   var client = server.AcceptTcpClient();
                   ThreadPool.QueueUserWorkItem(ReadMessage, client);
               }
           }
           catch (Exception ex)
           {
               Console.WriteLine($"Error starting server: {ex.Message}");
           }
       }

       private static void ReadMessage(object obj)
       {
           TcpClient client = (TcpClient)obj;
           NetworkStream stream = client.GetStream();
           byte[] buffer = new byte[4096];
           StringBuilder response = new StringBuilder();

           // 读取数据直到遇到换行符
           int bytesRead;
           while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) > 0)
           {
               response.Append(Encoding.ASCII.GetString(buffer, 0, bytesRead));
               if (response.ToString().IndexOf("\n") != -1)
                   break; // 数据结束标志
           }

           string message = response.ToString();
           Console.WriteLine($"Received from client: {message}");

           // 发送响应给客户端
           string reply = "Hello from the server!";
           stream.Write(Encoding.ASCII.GetBytes(reply), 0, reply.Length);

           // 关闭连接
           client.Close();
       }
   }

   // 启动服务器
   public static void Main(string[] args)
   {
       TcpServer.StartServer();
   }

3. **运行测试**：
- 运行`Main`函数，服务器将开始监听指定端口，等待客户端连接。