C#获得客户端IP

代码：

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/// <summary>         /// 获得当前页面客户端的IP         /// </summary>         /// <returns>当前页面客户端的IP</returns>         public static string GetIP()         {             string result = String.Empty;               result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];             if (null == result || result == String.Empty)             {                 result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];             }               if (null == result || result == String.Empty)             {                 result = HttpContext.Current.Request.UserHostAddress;             }               if (null == result || result == String.Empty || !IsIP(result))             {                 return "0.0.0.0";             }             return result;         }         /// <summary>         /// 是否为ip         /// </summary>         /// <param name="ip"></param>         /// <returns></returns>         public static bool IsIP(string ip)         {             return Regex.IsMatch(ip, @"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$");         }         public static bool IsIPSect(string ip)         {             return Regex.IsMatch(ip, @"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){2}((2[0-4]\d|25[0-5]|[01]?\d\d?|\*)\.)(2[0-4]\d|25[0-5]|[01]?\d\d?|\*)$");         }