public class Converter    {        private static String keys = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";//编码,可加一些字符也可以实现72,96等任意进制转换，但是有符号数据不直观，会影响阅读。        private static int exponent = keys.Length;//幂数        //string conn_Str = "";        /// <summary>        /// 十进制转多进制        /// </summary>        /// <param name="value">十进制的值<</param>        /// <param name="s">进制字符<</param>        /// <param name="k">多少进制<</param>        /// <returns>Return a specified 62 encode string</returns>        public static string Decimal2Str(decimal value, string s = "", int k = 0)        {            string result = string.Empty;            if (s != "")            {                keys = s;            }            else            {                if (k >= 2 && k <= 36)//二进制到36进制                {                    keys = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";                    keys = keys.Substring(0, k);                }            }            exponent = keys.Length;            do            {                decimal index = value % exponent;                result = keys[(int)index] + result;                value = (value - index) / exponent;            }            while (value > 0);            return result;        }        /// <summary>        /// 多进制转十进制        /// </summary>        /// <param name="value">多进制的值</param>        /// <param name="s">进制字符<</param>        /// <param name="k">多少进制<</param>        /// <returns>Return a specified decimal number that decode by 62 string</returns>        public static decimal Str2Decimal(string value, string s = "", int k = 0)        {            decimal result = 0;            if (s != "")            {                keys = s;            }            else            {                if (k >= 2 && k <= 36)//二进制到36进制                {                    keys = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";                    keys = keys.Substring(0, k);                }            }            exponent = keys.Length;            for (int i = 0; i < value.Length; i++)            {                int x = value.Length - i - 1;                result += keys.IndexOf(value[i]) * Pow(exponent, x);// Math.Pow(exponent, x);            }            return result;        }        /// <summary>        /// 一个数据的N次方        /// </summary>        /// <param name="x"></param>        /// <returns></returns>        private static decimal Pow(decimal baseNo, decimal x)        {            decimal value = http://www.mamicode.com/1;////1 will be the result for any number‘s power 0.任何数的0次方，结果都等于1            while (x > 0)            {                value = value * baseNo;                x--;            }            return value;        }    }