Scoket编程--UDP

以聊天的交互方式为例，，注意要开两个VS，先运行服务端，，，

服务器代码：

using System;using System.Net;using System.Net.Sockets;using System.Text;using System.Threading;namespace _002_Stcket_UDP服务端{    class Program    {        public static Socket udpServer;        static void Main(string[] args)        {            //1, 创建            udpServer = new Socket(AddressFamily.InterNetwork,SocketType.Dgram,ProtocolType.Udp);            //2,绑定ip            udpServer.Bind(new IPEndPoint(IPAddress.Parse("192.168.1.11"), 3355));            //3,接收数据            //设为后台线程并且开启线程            Console.WriteLine("服务器开始成功：");            new Thread(ReceiveMessage) { IsBackground = true }.Start();            //关闭就无法无限接收数据            //udpServer.Close();            Console.ReadKey();        }        /// <summary>        /// 接收数据        /// </summary>        static void ReceiveMessage()        {            while (true) {                EndPoint remoteEndpoint = new IPEndPoint(IPAddress.Any, 0);  //实例化一个空的ip：port                byte[] data = new byte[1024];               //接收字符的数组                                                            //此方法，会把数据的来源（Ip+端口号）放到第二个参数上                int length = udpServer.ReceiveFrom(data, ref remoteEndpoint);                string message = Encoding.UTF8.GetString(data,0,length);                Console.WriteLine("从ip" + (remoteEndpoint as IPEndPoint).Address + ":" + (remoteEndpoint as IPEndPoint).Port + "接收数据: "+ message);            }        }    }}

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客户端代码：

using System;using System.Net;using System.Net.Sockets;using System.Text;namespace _002_Socet_DUP客户端{    class Program    {        static void Main(string[] args)        {            //创建Scoket   (不用刻意记住，都是枚举，根据构造函数选取需要的就行了)            Socket udpClient = new Socket(AddressFamily.InterNetwork,SocketType.Dgram,ProtocolType.Udp);            while (true)            {                //发送数据  SendTo（要发消息转换的字节数组，端口号和ip地址）                EndPoint severEndpoint = new IPEndPoint(IPAddress.Parse("192.168.1.11"), 3355);                string message = Console.ReadLine();                byte[] data = Encoding.UTF8.GetBytes(message);                udpClient.SendTo(data, severEndpoint);                Console.WriteLine("消息已发出,输入p退出:--------");                if (message == "p")                {                    break;                }            }            udpClient.Close();            Console.ReadKey();        }    }}

运行示例：