public static MonthWeeks NumWeeks(this DateTime dt)
{
var monthWeeks = new MonthWeeks();
monthWeeks.WeekList = new List <MonthWeekStartEnd>();
//年
var year = dt.Year;
//月
var month = dt.Month;
//当前月第一天
var weekStart = new DateTime(year, month, 1);
//该月的最后一天
var monEnd = weekStart.AddMonths(1).AddDays(-1);
var i = 1;
//当前月第一天是星期几
var dayOfWeek = Convert.ToInt32(weekStart.DayOfWeek.ToString("d"));
//该月第一周结束日期
var weekEnd = dayOfWeek == 6 ? weekStart : weekStart.AddDays(6 - dayOfWeek);
monthWeeks.WeekList.Add(new MonthWeekStartEnd()
{
WeekStart = weekStart,
WeekEnd = weekEnd.AddDays(1).AddSeconds(-1)
});
//当日期小于或等于该月的最后一天
while (weekEnd.AddDays(1) <= monEnd)
{
i++;
//该周的开始时间
weekStart = weekEnd.AddDays(1);
//该周结束时间
weekEnd = weekEnd.AddDays(7) > monEnd ? monEnd : weekEnd.AddDays(7);
monthWeeks.WeekList.Add(new MonthWeekStartEnd()
{
WeekStart = weekStart,
WeekEnd = weekEnd.AddDays(1).AddSeconds(-1)
});
}
monthWeeks.WeekCount = i;
return(monthWeeks);
}
public static MonthWeeks NumWeeks(this DateTime dt)
{
var monthWeeks = new MonthWeeks();
monthWeeks.WeekList = new List<MonthWeekStartEnd>();
//年
var year = dt.Year;
//月
var month = dt.Month;
//当前月第一天
var weekStart = new DateTime(year, month, 1);
//该月的最后一天
var monEnd = weekStart.AddMonths(1).AddDays(-1);
var i = 1;
//当前月第一天是星期几
var dayOfWeek = Convert.ToInt32(weekStart.DayOfWeek.ToString("d"));
//该月第一周结束日期
var weekEnd = dayOfWeek == 6 ? weekStart : weekStart.AddDays(6 - dayOfWeek);
monthWeeks.WeekList.Add(new MonthWeekStartEnd()
{
WeekStart = weekStart,
WeekEnd = weekEnd.AddDays(1).AddSeconds(-1)
});
//当日期小于或等于该月的最后一天
while (weekEnd.AddDays(1) <= monEnd)
{
i++;
//该周的开始时间
weekStart = weekEnd.AddDays(1);
//该周结束时间
weekEnd = weekEnd.AddDays(7) > monEnd ? monEnd : weekEnd.AddDays(7);
monthWeeks.WeekList.Add(new MonthWeekStartEnd()
{
WeekStart = weekStart,
WeekEnd = weekEnd.AddDays(1).AddSeconds(-1)
});
}
monthWeeks.WeekCount = i;
return monthWeeks;
}