获得IP的Long值 - IpToULong

2017-02-26 15:19:32 访问(1436) 赞(0) 踩(0)


        #region 获得IP的Long值

        /// <summary>
        /// 获得IP的Long值 - IpToULong
        /// </summary>
        /// <param name="ip"></param>
        /// <returns></returns>
        public static ulong IpToULong(string ip)
        {
            if (ip == null || ip.Length == 0)
                throw new Exception("ip == null || ip.Length == 0");

            ip = ip.Trim();

            if (ip.Length == 0)
                throw new Exception("ip.Trim().Length == 0");

            string[] strIpArray = ip.Split('.');

            if (strIpArray == null || strIpArray.Length != 4)
                throw new Exception("string ip[" + ip + "] 为无效IP");
 
            return ulong.Parse(strIpArray[0])
                * 256 * 256 * 256
                + ulong.Parse(strIpArray[1])
                * 256 * 256
                + ulong.Parse(strIpArray[2])
                * 256
                + ulong.Parse(strIpArray[3]) - 1;
        }

        #endregion 获得IP的Long值