.NET 簡單實現廣播

代碼

    class Program
    {

        static bool connecting = true;
        static void Main()
        {
            Received();
            while (connecting)
            {
                string content = Console.ReadLine();
                if (content.Length > 0)
                {
                    if (string.Compare(content, "<Stop>", true) == 0)
                    {
                        Console.WriteLine("關閉...");
                        connecting = false;
                    }
                    else
                    {
                        Send(content);
                    }
                }
            }
            Console.ReadKey();
        }

        public static void Send(string content)
        {
            Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
            //IPEndPoint iep1 = new IPEndPoint(IPAddress.Broadcast, 9050);//255.255.255.255 
            IPEndPoint iep2 = new IPEndPoint(IPAddress.Parse("192.168.100.255"), 9050);
           // string hostname = Dns.GetHostName();
            byte[] data = Encoding.ASCII.GetBytes(content);
            sock.SetSocketOption(SocketOptionLevel.Socket,
            SocketOptionName.Broadcast, 1);
            //sock.SendTo(data, iep1);
            sock.SendTo(data, iep2);
            sock.Close();
        }

        public static void Received()
        {
            ThreadPool.QueueUserWorkItem((x) =>
            {
                Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
                IPEndPoint iep = new IPEndPoint(IPAddress.Any, 9050);
                sock.Bind(iep);
                EndPoint ep = (EndPoint)iep;

                byte[] data;
                int recv;
                string stringData;
                Console.WriteLine("接聽開啟...");
                while (connecting)
                {
                    data = new byte[1024];
                    recv = sock.ReceiveFrom(data, ref ep);
                    stringData = Encoding.ASCII.GetString(data, 0, recv);
                    Console.WriteLine("資訊: {0} 來自: {1}", stringData, ep.ToString());
                }
                Console.WriteLine("接聽關閉...");
                sock.Close();
            });
        }

    }