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;
}
