c#插入时间

//获取日期+时间

DateTime.Now.ToString();//2008-9-420:02:10
DateTime.Now.ToLocalTime().ToString();//2008-9-420:12:12
//获取日期
DateTime.Now.ToLongDateString().ToString();//2008年9月4日
DateTime.Now.ToShortDateString().ToString();//2008-9-4
DateTime.Now.ToString(“yyyy-MM-dd”);//2008-09-04
DateTime.Now.Date.ToString();//2008-9-40:00:00

//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();//2008-9-412:19:14
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
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