static void Main()
{
LocalDate date = new LocalDate(2012, 1, 1);
IWeekYearRule rule = WeekYearRules.Iso;
Console.WriteLine($"WeekYear: {rule.GetWeekYear(date)}"); // 2011
Console.WriteLine($"WeekOfWeekYear: {rule.GetWeekOfWeekYear(date)}"); // 52
}
public DateInterval Convert(PublicationPeriod publicationPeriod)
{
IWeekYearRule rule = WeekYearRules.Iso;
var today = LocalDate.FromDateTime(DateTime.Today);
var weekNumber = rule.GetWeekOfWeekYear(today);
switch (publicationPeriod)
{
case PublicationPeriod.ThisWeek:
LocalDate startOfThisWeek = LocalDate.FromWeekYearWeekAndDay(today.Year, weekNumber, IsoDayOfWeek.Monday);
return(new DateInterval(startOfThisWeek, LocalDate.FromDateTime(DateTime.Today)));
case PublicationPeriod.LastWeek:
LocalDate startOfLastWeek = LocalDate.FromWeekYearWeekAndDay(today.Year, rule.GetWeekOfWeekYear(today.PlusWeeks(-1)), IsoDayOfWeek.Monday);
return(new DateInterval(startOfLastWeek, startOfLastWeek.PlusWeeks(1).PlusDays(-1)));
case PublicationPeriod.ThisMonth:
var startOfThisMonth = LocalDate.FromDateTime(new DateTime(today.Year, today.Month, 1));
return(new DateInterval(startOfThisMonth, today));
case PublicationPeriod.LastMonth:
var startOfLastMonth = LocalDate.FromDateTime(new DateTime(today.Year, today.Month, 1)).PlusMonths(-1);
var endOfLastMonth = new LocalDate(startOfLastMonth.Year, startOfLastMonth.Month, startOfLastMonth.Calendar.GetDaysInMonth(startOfLastMonth.Year, startOfLastMonth.Month));
return(new DateInterval(startOfLastMonth, endOfLastMonth));
case PublicationPeriod.ThisYear:
var startOfThisYear = LocalDate.FromDateTime(new DateTime(today.Year, 1, 1));
return(new DateInterval(startOfThisYear, today));
case PublicationPeriod.LastYear:
var startOfLastYear = LocalDate.FromDateTime(new DateTime(today.Year, 1, 1)).PlusYears(-1);
var endOfLastYear = LocalDate.FromDateTime(new DateTime(today.Year, 12, 31)).PlusYears(-1);
return(new DateInterval(startOfLastYear, endOfLastYear));
default:
throw new ArgumentOutOfRangeException(nameof(publicationPeriod), publicationPeriod, null);
}
}
/// <summary> /// Convenience overload to call <see cref="IWeekYearRule.GetWeeksInWeekYear(int, CalendarSystem)"/> with /// the ISO calendar system. /// </summary> /// <param name="rule">The rule to delegate the call to.</param> /// <param name="weekYear">The week year to calculate the number of contained weeks.</param> /// <returns>The number of weeks in the given week year.</returns> public static int GetWeeksInWeekYear([NotNull] this IWeekYearRule rule, int weekYear) => Preconditions.CheckNotNull(rule, nameof(rule)).GetWeeksInWeekYear(weekYear, CalendarSystem.Iso);
/// <summary> /// Convenience method to call <see cref="IWeekYearRule.GetLocalDate(int, int, IsoDayOfWeek, CalendarSystem)"/> /// passing in the ISO calendar system. /// </summary> /// <param name="rule">The rule to delegate the call to.</param> /// <param name="weekYear">The week-year of the new date. Implementations provided by Noda Time allow any /// year which is a valid calendar year, and sometimes one less than the minimum calendar year /// and/or one more than the maximum calendar year, to allow for dates near the start of a calendar /// year to fall in the previous week year, and similarly for dates near the end of a calendar year.</param> /// <param name="weekOfWeekYear">The week of week-year of the new date. Valid values for this parameter /// may vary depending on <paramref name="weekYear"/>, as the length of a year in weeks varies.</param> /// <param name="dayOfWeek">The day-of-week of the new date. Valid values for this parameter may vary /// depending on <paramref name="weekYear"/> and <paramref name="weekOfWeekYear"/>.</param> /// <exception cref="ArgumentOutOfRangeException">The parameters do not combine to form a valid date.</exception> /// <returns>A <see cref="LocalDate"/> corresponding to the specified values.</returns> public static LocalDate GetLocalDate([NotNull] this IWeekYearRule rule, int weekYear, int weekOfWeekYear, IsoDayOfWeek dayOfWeek) => Preconditions.CheckNotNull(rule, nameof(rule)).GetLocalDate(weekYear, weekOfWeekYear, dayOfWeek, CalendarSystem.Iso);
