A20_Socket编程UDP协议通讯

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using System.Threading;
using System.Net;
using System.Net.Sockets;

namespace A20_UDP_Server
{
    class Server
    {
        private Socket _SockServer;                    //服务器监听套接字
        private bool _IsListenContecion = true;         //是否在监听（目的是方便退出）

        public Server()
        {
            Console.WriteLine("---------------服务端启动-----------------");
            //定义网络终结点（封装IP与端口）
            IPEndPoint endPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 1000);
            //实例化套接字
            _SockServer = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

            //服务器端绑定地址
            _SockServer.Bind(endPoint);

            EndPoint ep = endPoint as EndPoint;

            while (true)
            {
                byte[] msgArray = new byte[1024 * 1024]; //1M空间
                //接收客户端发来的数据，返回真实的长度
                int trueClinetMsgLength = _SockServer.ReceiveFrom(msgArray, ref ep);
                //byte数组转String
                string strMsg = Encoding.UTF8.GetString(msgArray, 0, trueClinetMsgLength);
                //显示客户端发来的数据
                Console.WriteLine("客户端发来的数据：" + strMsg);

            }
        }


        static void Main(string[] args)
        {
            Server obj = new Server();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using System.Threading;
using System.Net;
using System.Net.Sockets;

namespace A21_UDP_Client
{
    class Client
    {
        private Socket _SockClient;         //客户端通讯套接字
        private IPEndPoint serverEndPoint;  //连接到的服务器IP与端口信息

        public Client()
        {
            //通讯地址端口号
            serverEndPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 1000);
            //建立客户端的Sockte
            _SockClient = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

            EndPoint ep = serverEndPoint as EndPoint;

            while (true)
            {
                //输入信息
                string strMsg = Console.ReadLine();
                //退出
                if (strMsg == "gm_exit")
                {
                    break;
                }
                //字节转换
                Byte[] byteArray = Encoding.UTF8.GetBytes(strMsg);
                //发送数据
                _SockClient.SendTo(byteArray, ep);
                Console.WriteLine("我： " + strMsg);
            }
            //关闭连接
            _SockClient.Shutdown(SocketShutdown.Both);
            //清理连接的资源
            _SockClient.Close();
        }


        static void Main(string[] args)
        {
            Client obj = new Client();
        }
    }
}

Server类和Client类分别在不同的启动项中

这里的Server和Client本质上是“接收端”和“发送端”的关系。

并非真正意义上的服务器和客户端。