.NET 简单实现广播

代码

     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( " 关闭... " );
                        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( " 接听开启... " );
                 while  (connecting)
                {
                    data  =   new   byte [ 1024 ];
                    recv  =  sock.ReceiveFrom(data,  ref  ep);
                    stringData  =  Encoding.ASCII.GetString(data,  0 , recv);
                    Console.WriteLine( " 信息: {0} 来自: {1} " , stringData, ep.ToString());
                }
                Console.WriteLine( " 接听关闭... " );
                sock.Close();
            });
        }

    }