lblWeekStart.Content =
DateTime.Now.AddDays(Convert.ToDouble((0 -
Convert.ToInt16(DateTime.Now.DayOfWeek)))).ToShortDateString();
lblWeekEnd.Content = DateTime.Now.AddDays(Convert.ToDouble((6 -
Convert.ToInt16(DateTime.Now.DayOfWeek)))).ToShortDateString();
lblMouthStart.Content = DateTime.Today.AddDays(-(DateTime.Today.Day) +
1).ToString("yyyy-MM-dd");
lblMouthEnd.Content
=
DateTime.Today.AddMonths(1).AddDays(-(DateTime.Today.Day)).ToString("yyyy-MM-dd");//最后一天
lblQuarterStart.Content = DateTime.Today.AddMonths(0 - (DateTime.Today.Month -
1) % 3).AddDays(1 - DateTime.Today.Day).ToString("yyyy-MM-dd");
lblQuarterEnd.Content = DateTime.Today.AddMonths(0 - (DateTime.Today.Month - 1)
% 3).AddDays(1 -
DateTime.Today.Day).AddMonths(3).AddDays(-1).ToString("yyyy-MM-dd");
lblYearStart.Content = new DateTime(DateTime.Today.Year, 1,
1).ToString("yyyy-MM-dd");
lblYearEnd.Content = new DateTime(DateTime.Today.Year, 12,
31).ToString("yyyy-MM-dd");
说明:以lbl开头的为 Label 控件