SQL SERVER 下PadLeft函数

   1: int ID = da.GetMaxNum() + 1;  

   2: this.tbID.Text = ID.ToString().PadLeft(6, ‘0‘);  

   1: --在sql中  

   2:   

   3: --功能:右对齐的字符，在左边用指定的字符填充以达到指定的总长度。  

   4: --原始字符 @num；填充字符 @paddingChar；字符总长度 @totalWidth

   5:  

   6:   

   7: CREATE FUNCTION PadLeft(@num varchar(16),

   8:                         @paddingChar char(1),

   9:                         @totalWidth int)  

  10: RETURNS VARCHAR(16) AS 

  11:         

  12:     BEGIN

  13:         DECLARE @curStr VARCHAR(16)

  14:         SELECT @curStr = ISNULL(REPLICATE(@paddingChar,@totalWidth - len(isnull(@num ,0))), ‘‘) + @num  

  15:  

  16:         RETURN @curStr

  17:     END  

  18:  

  19:  

  20: --测试函数:    

  21: SELECT [EvaluationSystem].[dbo].[PadLeft] (

  22:    ‘8‘,

  23:    ‘x‘,

  24:    5)

  25: GO