byte[] data = new byte[1024];//定义一个数组用来做数据的缓冲区 string input, stringData; IPEndPoint ipep = new IPEndPoint(IPAddress.Parse(ip), port); Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); string welcome = "Hello,are you there?"; data = Encoding.ASCII.GetBytes(welcome); server.SendTo(data, data.Length, SocketFlags.None, ipep);//将数据发送到指定的终结点 IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0); EndPoint Remote = (EndPoint)sender; data = new byte[1024]; int recv = server.ReceiveFrom(data, ref Remote);//接受来自服务器的数据 Console.WriteLine("Message received from{0}:", Remote.ToString()); Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv)); while (true)//读取数据 { input = Console.ReadLine();//从键盘读取数据 if (input == "text")//结束标记 { break; } server.SendTo(Encoding.ASCII.GetBytes(input), Remote);//将数据发送到指定的终结点Remote data = new byte[1024]; recv = server.ReceiveFrom(data, ref Remote);//从Remote接受数据 stringData = Encoding.ASCII.GetString(data, 0, recv); Console.WriteLine(stringData); } Console.WriteLine("Stopping client"); server.Close();