,,,,//获取日期+时间, ,,,DateTime.Now.ToString (),,,,,,,,,,,,,//, 2008 - 9 - 4, 20:02:10 ,,,DateTime.Now.ToLocalTime () .ToString (),,,,,,,,,//, 2008 - 9 - 4, 20:12:12 ,,,//获取日期, ,,,DateTime.Now.ToLongDateString () .ToString(),,,,,//, 2008,年,9日,月,4,日, ,,,DateTime.Now.ToShortDateString () .ToString (),,,,,//, 2008 - 9 - 4, ,,,DateTime.Now.ToString (“yyyy-MM-dd”),,,,,,,,,//, 2008 - 09 - 04 -, ,,,DateTime.Now.Date.ToString (),,,,,,,,,,,,,//, 2008 - 9 - 4, 0:00:00 ,,,//获取时间, ,,,DateTime.Now.ToLongTimeString () .ToString ();,,,//, 20:16:16 ,,,DateTime.Now.ToShortTimeString () .ToString ();,,,//, 20:16 ,,,DateTime.Now.ToString (hh: mm: ss),,,,,,,,,//, 08:05:57 ,,,DateTime.Now.TimeOfDay.ToString (),,,,,,,,,//, 20:33:50.7187500 ,,,//其他, ,,,DateTime.ToFileTime () .ToString (),,,,,,,,//, 128650040212500000, ,,,DateTime.Now.ToFileTimeUtc () .ToString ();,,,//, 128650040772968750, ,,,DateTime.Now.ToOADate () .ToString (),,,,,,,,//, 39695.8461709606, ,,,DateTime.Now.ToUniversalTime () .ToString ();,,,//, 2008 - 9 - 4, 12:19:14 ,,,DateTime.Now.Year.ToString(),,,,,,,,,,获取年份,,//,2008, ,,,DateTime.Now.Month.ToString(),,,,,,,获取月份,,,//,9, ,,,DateTime.Now.DayOfWeek.ToString();,获取星期,,,//,Thursday ,,,DateTime.Now.DayOfYear.ToString();,获取第几天,,,//,248, ,,,DateTime.Now.Hour.ToString(),,,,,,,,,,,获取小时,,,//,20, ,,,DateTime.Now.Minute.ToString(),,,,,,获取分钟,,,//,31岁, ,,,DateTime.Now.Second.ToString(),,,,,,获取秒数,,,//,45, ,,,//n 为一个数,可以数整数,也可以事小数, ,,,dt.AddYears (n) .ToString();,,,//时间加,n 年, ,,,dt.AddDays (n) .ToString();,,,//加,n 天, ,,,dt.AddHours (n) .ToString();,,,//加,n 小时, ,,,dt.AddMonths (n) .ToString();,,,//加,n 个月, ,,,dt.AddSeconds (n) .ToString();,,,//加,n 秒, ,,,dt.AddMinutes (n) .ToString();,,,//加,n 分