C#数值转化成日期格式

DateTimedt = DateTime.FromOADate(dp.XValue);//将double的xvalue转换为datetime形式

DateTimedt = DateTime.Now;//2010年10月4日17点05分

stringstr = "";

//str = string.Format("{0:y yyyyyyyyy}", dt); //10 10 2010 2010

//str = String.Format("{0:M MM MMM MMMM}", dt); //10 10 十月十月

//str = String.Format("{0:d ddddddddd}", dt); //4 04 周一星期一

//str = String.Format("{0:h hh H HH}", dt); // 5 05 17 17

//str = String.Format("{0:m mm}", dt); //8 08

//str = String.Format("{0:s ss}", dt); //3 03

//str = String.Format("{0:f fffffffff}", dt); //9 95 953 9530

//str = String.Format("{0:F FF FFF FFFF}", dt); //9 95 953 953

//str = String.Format("{0:t tt}", dt); //下下午

//str = String.Format("{0:z zzzzz}", dt); //+8 +08 +08:00

//str = String.Format("{0:d/M/yyyyHH:mm:ss}", dt); //4-10-2010 17:16:50

//str = String.Format("{0:M/d/yyyy}", dt); //10-4-2010

//str = String.Format("{0:MM/dd/yyyy}", dt); //10-04-2010

//str = String.Format("{0:ddd, MMM d, yyyy}", dt); //周一, 十月4, 2010

//str = String.Format("{0:dddd, MMMM d, yyyy}", dt); //星期一, 十月4, 2010

//str = String.Format("{0:MM/dd/yy}", dt); //10-04-10

//str = String.Format("{0:MM/dd/yyyy}", dt); //10-04-2010

//str = String.Format("{0:t}", dt); //17:29

//str = String.Format("{0:d}", dt); //2010-10-4

//str = String.Format("{0:T}", dt); //17:29:59

//str = String.Format("{0:D}", dt); //2010年10月4日

//str = String.Format("{0:f}", dt); //2010年10月4日17:30

//str = String.Format("{0:F}", dt); //2010年10月4日17:31:11

//str = String.Format("{0:g}", dt); //2010-10-4 17:35

//str = String.Format("{0:G}", dt); //2010-10-4 17:36:18

//str = String.Format("{0:m}", dt); //10月4日

//str = String.Format("{0:y}", dt); //2010年10月

//str = String.Format("{0:r}", dt); //Mon, 04 Oct 2010 17:37:25 GMT

//str = String.Format("{0:s}", dt); //2010-10-04T17:37:43

str = String.Format("{0:u}", dt); //2010-10-04 17:38:01Z