C#实现简单的udp收发的代码
发送
try
{
Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); //向此网段发广播包
int UDPListenerPort = 8082;
IPAddress broadcast = IPAddress.Parse("192.168.0.255"); //此处根据IP及子网掩码改为相应的广播IP
string ts = "This is UPD string for sending";
byte[] sendbuf = Encoding.ASCII.GetBytes(ts);
IPEndPoint ep = new IPEndPoint(broadcast, UDPListenerPort);
s.SendTo(sendbuf, ep);
}
catch (Exception e)
{}
接收
UdpClient listener;
int UDPListenerPort = 8082;
IPEndPoint groupEP = new IPEndPoint(IPAddress.Any, UDPListenerPort);
try
{
while (true)
{
byte[] bytes = listener.Receive(ref groupEP);
string RecIP = groupEP.ToString().Substring(0, groupEP.ToString().IndexOf(":")); //收到发送UPD端的IP
string RecStr = Encoding.ASCII.GetString(bytes, 0, bytes.Length); //收到的UPD字符串
}
}
catch
{}
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