C#-自动获取IP

 //自动获取ip
rip是个下拉列表
public void GetIp()
{
      try
      {
         string strHostName = Dns.GetHostName();  //得到本机的主机名
         IPHostEntry ipEntry = Dns.GetHostByName(strHostName); //取得本机IP
         string strAddr = ipEntry.AddressList[0].ToString();
         rip.Text = strAddr;
         rip.Items.Clear();
         for (int i = 0; i < 10; i++)
         {
                strAddr = ipEntry.AddressList[i].ToString();
                rip.Items.Add(strAddr);
          }

      }
      catch{}
}