.NET编程及SQL报表中常用到数字或者日期的格式转化，那些格式字符总是记不住，索性列出来备查：

Standard numeric format strings: http://msdn2.microsoft.com/en-us/library/aa720653.aspx
Custom numeric format strings: http://msdn2.microsoft.com/en-us/library/aa719871.aspx
Standard date format strings: http://msdn2.microsoft.com/en-us/library/aa720651.aspx
Custom date format strings: http://msdn2.microsoft.com/en-us/library/aa719856.aspx