[Quote=引用 64 楼 wxg22526451 的回复:]
C#UDP的多路广播组的发送和接收
下列范例使用 UdpClient，在通讯端口11000传送UDP 资料包至多点传送位址群组 224.268.100.2。它传送命令列上指定的信息字串。
C# codeusing System;using System.Net;using System.Net.Sockets;using System.Text;publicclass UDPMulticastSender {privatestatic IPAddress GroupAddress=
IPAddress.Parse("224.168.100.2");privatestaticint GroupPort=11000;privatestaticvoid Send( String message) {
UdpClient sender=new UdpClient();
IPEndPoint groupEP=new IPEndPoint(GroupAddress,GroupPort);try {
Console.WriteLine("Sending datagram : {0}", message);byte[] bytes= Encoding.ASCII.GetBytes(message);
sender.Send(bytes, bytes.Length, groupEP);
sender.Close();
}catch (Exception e) {
Console.WriteLine(e.ToString());
}
}publicstaticint Main(String[] args) {
Send(args[0]);return0;
}
}
下列范例使用 UdpClient，在通讯端口 11000 监听广播到多点传送位址群组 224.168.100.2 的 UDP 资料包。它接收信息字串，并將信息写入主控台 (Console)。
C# codeusing System;using System.Net;using System.Net.Sockets;using System.Text;publicclass UDPMulticastListener {privatestaticreadonly IPAddress GroupAddress=
IPAddress.Parse("224.168.100.2");privateconstint GroupPort=11000;privatestaticvoid StartListener() {bool done=false;
UdpClient listener=new UdpClient();
IPEndPoint groupEP=new IPEndPoint(GroupAddress,GroupPort);try {
listener.JoinMulticastGroup(GroupAddress);
listener.Connect(groupEP);while (!done) {
Console.WriteLine("Waiting for broadcast");byte[] bytes= listener.Receive(ref groupEP);
Console.WriteLine("Received broadcast from {0} :/n {1}/n",
groupEP.ToString(),
Encoding.ASCII.GetString(bytes,0,bytes.Length));
}
listener.Close();
}catch (Exception e) {
Console.WriteLine(e.ToString());
}
}publicstaticint Main(String[] args) {
StartListener();return0;
}
}
[/Quote]
转自http://topic.csdn.net/u/20080619/08/dcef3fe2-f95b-4918-8edb-36d48a3d0528.html?22490#replyachor