C# ping网络IP 实现网络状态检测

  public string GetHostNameByIp(string ip)
         {
             ip = ip.Trim();
             if (ip == string.Empty)
                 return string.Empty;
             try
             {
                 // 是否 Ping 的通
                 if (this.Ping(ip))
                 {
                     System.Net.IPHostEntry host = System.Net.Dns.GetHostEntry(ip);
                     return host.HostName;
                 }
                 else
                     return string.Empty;
             }
             catch (Exception)
             {
                 return string.Empty;
             }
         }