public static int Year(DateTime DateValue)
{
return(CurrentCalendar.GetYear(DateValue));
}
public static int DatePart(DateInterval Interval,
DateTime DateValue,
[Optional, DefaultParameterValue(FirstDayOfWeek.Sunday)]
FirstDayOfWeek FirstDayOfWeekValue,
[Optional, DefaultParameterValue(FirstWeekOfYear.Jan1)]
FirstWeekOfYear FirstWeekOfYearValue)
{
DayOfWeek firstDayOfWeek;
CalendarWeekRule calendarWeekRule = 0;
switch (Interval)
{
case DateInterval.Year:
return(CurrentCalendar.GetYear(DateValue));
case DateInterval.Quarter:
return(((DateValue.Month - 1) / 3) + 1);
case DateInterval.Month:
return(CurrentCalendar.GetMonth(DateValue));
case DateInterval.DayOfYear:
return(CurrentCalendar.GetDayOfYear(DateValue));
case DateInterval.Day:
return(CurrentCalendar.GetDayOfMonth(DateValue));
case DateInterval.WeekOfYear:
if (FirstDayOfWeekValue != FirstDayOfWeek.System)
{
firstDayOfWeek = (DayOfWeek)(FirstDayOfWeekValue - 1);
break;
}
firstDayOfWeek = Utils.GetCultureInfo().DateTimeFormat.FirstDayOfWeek;
break;
case DateInterval.Weekday:
return(Weekday(DateValue, FirstDayOfWeekValue));
case DateInterval.Hour:
return(CurrentCalendar.GetHour(DateValue));
case DateInterval.Minute:
return(CurrentCalendar.GetMinute(DateValue));
case DateInterval.Second:
return(CurrentCalendar.GetSecond(DateValue));
default:
throw new ArgumentException(Utils.GetResourceString("Argument_InvalidValue1", new string[] { "Interval" }));
}
switch (FirstWeekOfYearValue)
{
case FirstWeekOfYear.System:
calendarWeekRule = Utils.GetCultureInfo().DateTimeFormat.CalendarWeekRule;
break;
case FirstWeekOfYear.Jan1:
calendarWeekRule = CalendarWeekRule.FirstDay;
break;
case FirstWeekOfYear.FirstFourDays:
calendarWeekRule = CalendarWeekRule.FirstFourDayWeek;
break;
case FirstWeekOfYear.FirstFullWeek:
calendarWeekRule = CalendarWeekRule.FirstFullWeek;
break;
}
return(CurrentCalendar.GetWeekOfYear(DateValue, calendarWeekRule, firstDayOfWeek));
}