C#向指定的ip地址通过TCP/IP协议发送和接受信息-Toy模板网

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需要使用Socket类来创建和连接TCP/IP套接字，并使用Send和Receive方法来发送和接收数据。还需要引用System.Net和System.Net.Sockets命名空间。

以下是一个示例代码，它发送一个字符串消息到指定的IP地址和端口，并接收返回消息。

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

public string sendTCPMessage (string ip_address, string port, string message)
{
    try
    {
        // Convert the ip address and port to an IPEndPoint object
        int converted_port = Convert.ToInt32 (port);
        IPAddress converted_ip = IPAddress.Parse(ip_address);
        IPEndPoint ipEndPoint = new IPEndPoint(converted_ip, converted_port);

        // Create a TCP client socket and connect to the server
        using Socket client = new(ipEndPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
        await client.ConnectAsync(ipEndPoint);

        // Encode the message to a byte array and send it
        byte[] messageBytes = Encoding.UTF8.GetBytes(message);
        await client.SendAsync(messageBytes, SocketFlags.None);

        // Receive the response from the server
        byte[] responseBytes = new byte[1024];
        int bytesReceived = await client.ReceiveAsync(responseBytes, SocketFlags.None);
        string response = Encoding.UTF8.GetString(responseBytes, 0, bytesReceived);

        // Print the response to the console
        Console.WriteLine("Received: {0}", response);

        // Set the success flag to true
        success = true;
    }
    catch (Exception e)
    {
        // Print the exception to the console
        Console.WriteLine(e.Message);
    }
    return response;
}