.net - 如何在给定日期的一周内获得工作日？

Question

这个问题可能不是最清楚的，但这是我需要的:

var date = new LocalDate(2020, 05, 05);

我需要给定日期所在一周的星期一和星期五的日期。

Answer 1

我建议将代码编写为日期调整器:

public static class DayOfWeekAdjusters
{
    public static Func<LocalDate, LocalDate> ForIsoDayOfWeek(IsoDayOfWeek dayOfWeek) =>
        date => WeekYearRules.Iso.GetLocalDate(
            WeekYearRules.Iso.GetWeekYear(date),
            WeekYearRules.Iso.GetWeekOfWeekYear(date), 
            dayOfWeek);
}

然后你可以使用:

private static readonly Func<LocalDate, LocalDate> MondayAdjuster =
    DayOfWeekAdjusters.ForIsoDayOfWeek(IsoDayOfWeek.Monday);
private static readonly Func<LocalDate, LocalDate> FridayAdjuster =
    DayOfWeekAdjusters.ForIsoDayOfWeek(IsoDayOfWeek.Friday);

...
var date = new LocalDate(2020, 05, 05);
var monday = date.With(MondayAdjuster);
var friday = date.With(FridayAdjuster);

您也可以将这些调节器与 LocalDateTime 和 OffsetDateTime 一起使用。