c#UDP通信

UDP服务端

  class Program
    {
        private static Socket udpServer;
        static void Main(string[] args) {
            //1,创建socket
             udpServer = new Socket(AddressFamily.InterNetwork,SocketType.Dgram,ProtocolType.Udp);
            //2,绑定ip跟端口号
            udpServer.Bind( new IPEndPoint( IPAddress.Parse("192.168.2.124"),7788 ) );

            //3，接收数据
            new Thread(ReceiveMessage){ IsBackground = true}.Start();

            //udpServer.Close();
            Console.ReadKey();
        }
        /// <summary>
        /// 接收数据
        /// </summary>
        static void ReceiveMessage()
        {
            while (true)
            {
                EndPoint remoteEndPoint = new IPEndPoint(IPAddress.Any, 0);
                byte[] data = new byte[1024];
                int length = udpServer.ReceiveFrom(data, ref remoteEndPoint);//这个方法会把数据的来源(ip:port)放到第二个参数上
                string message = Encoding.UTF8.GetString(data, 0, length);
                Console.WriteLine("从ip：" + (remoteEndPoint as IPEndPoint).Address.ToString() + "：" + (remoteEndPoint as IPEndPoint).Port + "收到了数据：" + message);
            }

        }
    }

客户端

    class Program {
        static void Main(string[] args) {
            //创建socket
            Socket udpClient = new Socket(AddressFamily.InterNetwork,SocketType.Dgram, ProtocolType.Udp);

            while (true)
            {
                //发送数据
                EndPoint serverPoint = new IPEndPoint(IPAddress.Parse("192.168.2.124"), 7788);
                string message = Console.ReadLine();
                byte[] data = Encoding.UTF8.GetBytes(message);
                udpClient.SendTo(data, serverPoint);
            }


            udpClient.Close();
            Console.ReadKey();
        }
    }