根据2段时间获取期间的每个周末日期和月末日期
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 | private DateTime WeekStartTime(DateTime dateTime) { DateTime dt = dateTime; int dayOfWeek = -1 * ( int )dt.Date.DayOfWeek; DateTime weekStartTime = dt.AddDays(dayOfWeek + 1); //取本周一 if (dayOfWeek == 0) //如果今天是周日,则开始时间是上周一 { weekStartTime = weekStartTime.AddDays(-7); } return weekStartTime.Date; } private List<DateTime> GetSundays(DateTime start, DateTime end) { var startMonday = WeekStartTime(start); var startSunday = startMonday.AddDays(6); var endMonday = WeekStartTime(end); var endSunday = endMonday.AddDays(6); List<DateTime> list = new List<DateTime>(); TimeSpan sp = endSunday.Subtract(startSunday); int dayCount = sp.Days; var ceil = Convert.ToInt32(Math.Ceiling(dayCount / ( double )7)); for ( int i = 0; i <= ceil; i++) { var date = startSunday.AddDays(i * 7); if (i == ceil) { if (date > end) { list.Add(end); break ; } } list.Add(date); } return list; } private List<DateTime> GetYueMo(DateTime start, DateTime end) { DateTime startYueChu = start.AddDays(1 - start.Day); //本月月初 DateTime startYueMo = startYueChu.AddMonths(1).AddDays(-1); //本月月末 var endYueChu = end.AddDays(1 - end.Day); var endYueMo = endYueChu.AddMonths(1).AddDays(-1); List<DateTime> list = new List<DateTime>(); TimeSpan sp = endYueMo.Subtract(startYueMo); int ms = (endYueMo.Year * 12 + endYueMo.Month) - (startYueMo.Year * 12 + startYueMo.Month); for ( int i = 0; i <= ms; i++) { var date = startYueMo.AddMonths(i); if (i == ms) { if (date > end) { list.Add(end); break ; } } list.Add(date); } return list; } |
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