一月 15, 2010

示例C#利用UdpClient发送广播消息

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在此只做收藏被查,原文请访问:http://www.cnblogs.com/cgzwwy/archive/2009/12/10/1621389.html

 

首先写个接受消息的客户端。这里偷了点懒,new UdpClient(11000)就是用Udp方式侦听11000端口,侦听任何发送到11000端口的消息都会接收到。

 

代码

UdpClient udpClient = new UdpClient(11000);
try
{
IPEndPoint RemoteIpEndPoint
= new IPEndPoint(IPAddress.Any, 0);
Byte[] receiveBytes
= udpClient.Receive(ref RemoteIpEndPoint);
string returnData = Encoding.ASCII.GetString(receiveBytes);

Console.WriteLine(
"This is the message you received " +
returnData.ToString());
Console.WriteLine(
"This message was sent from " +
RemoteIpEndPoint.Address.ToString()
+
" on their port number " +
RemoteIpEndPoint.Port.ToString());

udpClient.Close();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}

 

 

 

然后写个发Udp的服务器

 

代码

UdpClient udpClient = new UdpClient(11001);
try
{
udpClient.Connect(IPAddress.Parse(
"192.168.0.255"), 11000);
Byte[] sendBytes
= Encoding.ASCII.GetBytes("Is anybody thereA?");

udpClient.Send(sendBytes, sendBytes.Length);

udpClient.Close();

}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}

 

 

 

其中192.168.0.255是你的内网广播地址,11000是客户端的端口。

广播地址是通过你的子网掩码获得的例如你的网关是192.168.0.1,掩码是255.255.255.0,那么你的广播地址就是192.168.0.255.

 

Category : .NetC#Window$WPF其他

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