数字转成字母的方法

一个将数字转成字母的方法

 1         private static string Num_to_letter(int value)

 2         {

 3             //此处判断输入的是否是正整数数字

 4             if (Regex.IsMatch(value.ToString(), "^\\d+$"))

 5             {

 6                 int remainder = value % 26;

 7                 //remainder = (remainder == 0) ? 26 : remainder;

 8                 int front = (value - remainder) / 26;

 9                 if (front == 0)

10                 {

11                     return Level[remainder];

12                 }

13                 else if (front < 26)

14                 {

15                     return Level[front - 1] + Level[remainder];

16                 }

17                 else

18                 {

19                     return Num_to_letter(front) + Level[remainder];

20                 }

21             }

22             else

23             {

24                 return string.Empty;

25             }

26 

27         }