int number = 1;string str = number.ToString().PadLeft(2,'0');//数字转化成2位字符串，不足在前面补”0“ 相关文章： 2021-10-11 2022-12-23 2022-12-23 2022-12-23 2022-12-23 2022-12-23 2022-12-23 2021-08-20