public void Scan()
{
var receiveSocket =
new UdpClient(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); //初始化一个Scoket协议
var receiveIep = new IPEndPoint(IPAddress.Any, 9127); //初始化一个侦听局域网内部所有IP和指定端口
EndPoint receiveEp = receiveIep;
receiveSocket.Bind(receiveIep); //绑定这个实例
while (true)
{
var receiveBuffer = new byte[1024]; //设置缓冲数据流
receiveSocket.ReceiveFrom(receiveBuffer, ref receiveEp); //接收数据,并确把数据设置到缓冲流里面
Console.WriteLine(Encoding.Unicode.GetString(receiveBuffer).TrimEnd('\0') + " " +
DateTime.Now.ToString(CultureInfo.InvariantCulture));
break;
}
UdpClient client = new UdpClient(new IPEndPoint(IPAddress.Any, 0));
IPEndPoint endpoint =
new IPEndPoint(IPAddress.Parse("255.255.255.255"), 7788); //默认向全世界所有主机发送即可，路由器自动给你过滤，只发给局域网主机
String ip = "host:" + Dns.GetHostEntry(Dns.GetHostName()).AddressList.Last().ToString(); //对外广播本机的ip地址
byte[] ipByte = Encoding.UTF8.GetBytes(ip);
DispatcherTimer dt = new DispatcherTimer
{
Interval = TimeSpan.FromSeconds(1)
}; //每隔1秒对外发送一次广播
dt.Tick += delegate { client.Send(ipByte, ipByte.Length, endpoint); };
dt.Start();
}
