C# 简单通信（支持一对多）_c#实现一对多的网络通信-优快云博客

本文链接：https://blog.youkuaiyun.com/Ac__pyt/article/details/49336127

本文介绍了如何使用C#实现简单的通信机制，特别是如何支持一对多的通信模式。服务端通过创建一个类似Map的数据结构，实现在同一服务器上处理多个客户端连接的能力。客户端的实现则保持不变。

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也就服务器不一样的写法，弄了一个类似于Map的容器，其实是字典数组的感觉，客户端和原来一样

服务端：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.IO;

namespace Server2
{
    public partial class Server : Form
    {
        public Server()
        {
            InitializeComponent();
            TextBox.CheckForIllegalCrossThreadCalls = false;
        }

        Thread threadWatch = null;
        Socket socketWatch = null;

        private void SendServer_Click(object sender, EventArgs e)
        {
            socketWatch = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
            int port = Convert.ToInt32(Port.Text.Trim());
            IPAddress ip = IPAddress.Parse(IP.Text.Trim());
            IPEndPoint ipe = new IPEndPoint(ip, port);
            socketWatch.Bind(ipe);
            socketWatch.Listen(5);
            threadWatch = new Thread(WatchConnect);
            threadWatch.IsBackground = true;
            threadWatch.Start();
            Message.AppendText("服务器已经启动，开始监听..." + "\r\n");
        }

        //感觉和C++的Map一样的一个容器
        Dictionary<string, Socket> dicSocket = new Dictionary<string, Socket>();

        Socket socketConnect = null;//与客户端建立连接的套接字
        string clientName = null;//访问者的名字
        IPAddress clientIP;//访问者的IP
        int clientPort;//访问者的端口号

        private void WatchConnect()
        {
            while (true)
            {
                try
                {
                    socketConnect = socketWatch.Accept();
                }
                catch (Exception ex)
                {
                    Message.AppendText(ex.Message);
                    break;
                }
                clientIP = (socketConnect.RemoteEndPoint as IPEndPoint).Address;//获取访问者的IP
                clientPort = (socketConnect.RemoteEndPoint as IPEndPoint).Port;//获取访问者的Port
                //创建访问者的标识，IP + Port
                clientName = "IP:" + clientIP + "Port:" + clientPort