private const string initValue = "A0000001";

        private static string cs = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";

        public static string AddOne(string str)

        {

            if (str == string.Empty)

            {

                return initValue;

            }

            Int64 num = StringToNumber(str);

            return NumberToString(++num);

        }

        public static Int64 StringToNumber(string str)

        {

            int leg = str.Length;

            double num = ;

            if (leg != )

            {

                for (int i = ; i < leg; i++)

                {

                    if (str[i] != '')

                    {

                        num += cs.IndexOf(str[i]) * Math.Pow(, leg -  - i);

                    }

                }

            }

            return Convert.ToInt64(num);

        }

        public static string NumberToString(Int64 num)

        {

            string str = string.Empty;

            while (num >= )

            {

                str = cs[(int)(num % )] + str;

                num = num / ;

            }

            return cs[(int)num] + str;

        }

class Program {

        static void Main(string[] args) {

            string curr = "ZZZZZZ";

            Console.WriteLine("原始值:" + curr);

            Int64 num = Scale.ToInt64(curr);

            Console.WriteLine("转成Int64:" + num);

            Console.WriteLine("根据Int64转成进制:" + Scale.ToCurr(num));

            Console.ReadLine();

        }

    }

    public static class Scale {

        /// <summary>

        /// 进制符号字符串

        /// </summary>

        private static string scString = "0123456789ABCDEFGHJKLMNPQRSTUVWXYZ";

        /// <summary>

        /// 字符集，可以根据编号索引拿到字符

        /// </summary>

        private static char[] scArray = scString.ToCharArray();

        /// <summary>

        /// 字符字典，可以根据字符拿到编号索引

        /// </summary>

        private static Dictionary<char, int> scDic = ToCharDic();

        /// <summary>

        /// 根据字符串反馈进制数

        /// </summary>

        public static int Len { get { return scString.Length; } }

        /// <summary>

        /// 将字符串处理成字符字典

        /// </summary>

        private static Dictionary<char, int> ToCharDic() {

            Dictionary<char, int> dic = new Dictionary<char, int>();

            for (int i = 0; i < scArray.Length; i++) {

                dic.Add(scArray[i], i);

            }

            return dic;

        }

        /// <summary>

        /// 根据传入的字符符号定义进制，字符符号不能重复，模拟十进制字符串为：0123456789

        /// </summary>

        public static void SetScale(string scaleString) {

            scString = scaleString;

            scArray = scString.ToCharArray();

            scDic = ToCharDic();

        }

        /// <summary>

        /// 将Int64转成当前进制字符串

        /// </summary>

        public static string ToCurr(long num) {

            string curr = "";

            while (num >= Len) {

                curr = scArray[num % Len] + curr;

                num = num / Len;

            }

            curr = scArray[num] + curr;

            return curr;

        }

        /// <summary>

        /// 将当前进制字符串转成Int64

        /// </summary>

        public static long ToInt64(string curr) {

            double num = 0;

            for (int i = 0; i < curr.Length; i++) {

                num += scDic[curr[i]] * Math.Pow(Len, curr.Length - 1 - i);

            }

            return Convert.ToInt64(num);

        }

    }