UdpClient无法在局域网中发送UDP广播包的解决办法

 1         /// <summary>
 2         /// 发送消息
 3         /// </summary>
 4         /// <param name="strDataToSend">要发送的字符串</param>
 5         /// <returns>发送成功与否的标识</returns>
 6         public bool SendMsg(string strDataToSend)
 7         {
 8             if (string.IsNullOrEmpty(strDataToSend)) return false;
 9 
10             UdpClient myUdpClient = new UdpClient();
11             try
12             {
13                 //让其自动提供子网中的IP广播地址
14                 IPEndPoint iep = new IPEndPoint(IPAddress.Broadcast, this.netInfo.SendPort);
15                 //将发送内容转换为字节数组
16                 byte[] bytes = Encoding.UTF8.GetBytes(strDataToSend);
17                 //向子网发送信息
18                 myUdpClient.Send(bytes, bytes.Length, iep);
19                 if (DataSended != null)
20                 {
21 
22                     DataSended(Instance, new SendEventArgs(strDataToSend));
23                 }
24 
25             }
26             catch (Exception err)
27             {
28                 throw err;
29             }
30             finally
31             {
32                 myUdpClient.Close();
33             }
34 
35             return false;
36         }