ibcadmin 发表于 2012-12-5 16:12:54

Udp Client发送局域网广播消息

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。
<div class="blockcode"><blockquote>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());
}
<p>然后写个发Udp的服务器</p><p> </p><div class="cnblogs_code"><span class="cnblogs_code_collapse">代码</span> :<div style="display: block;" id="cnblogs_code_open_7f65fb5c-36d6-4545-bb7a-62f606976cee" class="cnblogs_code_hide" jquery1260496893593="7"><pre><div><!--

Code highlighting produced by Actipro CodeHighlighter (freeware)
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--><span style="color: rgb(0, 0, 0);">UdpClient udpClient </span><span style="color: rgb(0, 0, 0);">=</span><span style="color: rgb(0, 0, 0);"> </span><span style="color: rgb(0, 0, 255);">new</span><span style="color: rgb(0, 0, 0);"> UdpClient(</span><span style="color: rgb(128, 0, 128);">11001</span><span style="color: rgb(0, 0, 0);">);
</span><span style="color: rgb(0, 0, 255);">try</span><span style="color: rgb(0, 0, 0);">
{
    udpClient.Connect(IPAddress.Parse(</span><span style="color: rgb(128, 0, 0);">"</span><span style="color: rgb(128, 0, 0);">192.168.0.255</span><span style="color: rgb(128, 0, 0);">"</span><span style="color: rgb(0, 0, 0);">), </span><span style="color: rgb(128, 0, 128);">11000</span><span style="color: rgb(0, 0, 0);">);
    Byte[] sendBytes </span><span style="color: rgb(0, 0, 0);">=</span><span style="color: rgb(0, 0, 0);"> Encoding.ASCII.GetBytes(</span><span style="color: rgb(128, 0, 0);">"</span><span style="color: rgb(128, 0, 0);">Is anybody thereA?</span><span style="color: rgb(128, 0, 0);">"</span><span style="color: rgb(0, 0, 0);">);

    udpClient.Send(sendBytes, sendBytes.Length);

    udpClient.Close();

}
</span><span style="color: rgb(0, 0, 255);">catch</span><span style="color: rgb(0, 0, 0);"> (Exception e)
{
    Console.WriteLine(e.ToString());
}
</span></div></pre></div></div><p>其中192.168.0.255是你的内网广播地址，11000是客户端的端口。</p><p>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.</p>



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chao2332601 发表于 2013-6-16 02:10:01

谢谢分享！！！

chao2332601 发表于 2013-6-16 04:53:31

谢谢分享！！！
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