public static bool IsLastKindDayOfMonth(this DateTime dateTime, DayOfKind dayOfKind)
{
switch (dayOfKind)
{
case DayOfKind.Sunday:
case DayOfKind.Monday:
case DayOfKind.Tuesday:
case DayOfKind.Wednesday:
case DayOfKind.Thursday:
case DayOfKind.Friday:
case DayOfKind.Saturday:
return(dateTime.Day == dateTime.GetLastDayOfWeekOfMonth((DayOfWeek)((int)dayOfKind)).Day);
case DayOfKind.Day:
return(dateTime.Day == dateTime.GetLastDayOfMonth().Day);
case DayOfKind.Weekday:
return(dateTime.Day == dateTime.GetLastWeekdayOfMonth().Day);
case DayOfKind.WeekendDay:
return(dateTime.Day == dateTime.GetLastWeekendDayOfMonth().Day);
default:
break;
}
return(false);
}
public static bool IsFourthKindDayOfMonth(this DateTime target, DayOfKind dayOfKind)
{
switch (dayOfKind)
{
case DayOfKind.Sunday:
case DayOfKind.Monday:
case DayOfKind.Tuesday:
case DayOfKind.Wednesday:
case DayOfKind.Thursday:
case DayOfKind.Friday:
case DayOfKind.Saturday:
return(target.Day == target.GetFourthDayOfWeekOfMonth((DayOfWeek)((int)dayOfKind)).Day);
case DayOfKind.Day:
return(target.Day == target.GetFourthDayOfMonth().Day);
case DayOfKind.Weekday:
return(target.Day == target.GetFourthWeekdayOfMonth().Day);
case DayOfKind.WeekendDay:
return(target.Day == target.GetFourthWeekendDayOfMonth().Day);
default:
break;
}
return(false);
}
public static bool IsKindDayOfMonth(this DateTimeOffset dateTime, DayOfMonth dayOfMonth, DayOfKind dayOfKind)
{
switch (dayOfMonth)
{
case DayOfMonth.First:
return(IsFirstKindDayOfMonth(dateTime, dayOfKind));
case DayOfMonth.Second:
return(IsSecondKindDayOfMonth(dateTime, dayOfKind));
case DayOfMonth.Third:
return(IsThirdKindDayOfMonth(dateTime, dayOfKind));
case DayOfMonth.Fourth:
return(IsFourthKindDayOfMonth(dateTime, dayOfKind));
case DayOfMonth.Fifth:
case DayOfMonth.Sixth:
case DayOfMonth.Seventh:
case DayOfMonth.Eighth:
case DayOfMonth.Ninth:
case DayOfMonth.Tenth:
case DayOfMonth.Eleventh:
case DayOfMonth.Twelfth:
case DayOfMonth.Thirteenth:
case DayOfMonth.Fourteenth:
case DayOfMonth.Fifteenth:
case DayOfMonth.Sixteenth:
case DayOfMonth.Seventeenth:
case DayOfMonth.Eighteenth:
case DayOfMonth.Nineteenth:
case DayOfMonth.Twentieth:
case DayOfMonth.TwentyFirst:
case DayOfMonth.TwentySecond:
case DayOfMonth.TwentyThird:
case DayOfMonth.TwentyFourth:
case DayOfMonth.TwentyFifth:
case DayOfMonth.TwentySixth:
case DayOfMonth.TwentySeventh:
case DayOfMonth.TwentyEighth:
case DayOfMonth.TwentyNineth:
case DayOfMonth.Thirtieth:
case DayOfMonth.ThirtyFirst:
{
if (dayOfKind != DayOfKind.Day)
{
throw new InvalidProgramException("Does not support given kind of day.");
}
int day = (int)dayOfMonth;
return(dateTime.Day == day);
}
case DayOfMonth.Last:
return(IsLastKindDayOfMonth(dateTime, dayOfKind));
default:
break;
}
throw new InvalidProgramException("Cannot parse the given month and day.");
}