/// <summary>
/// Gets the xth weekend day
/// </summary>
/// <param name="count"></param>
/// <returns></returns>
public static int WeekendDay(int month, int year, int count)
{
if (count != 5)
{
DateTime firstDay = new DateTime(year, month, 1);
// Get the first weekday
firstDay = JumpToWeekend(firstDay);
// Add the number of days
for (int i = 0; i < count - 1; i++)
{
firstDay = firstDay.AddDays(1);
firstDay = JumpToWeekend(firstDay);
}
return(firstDay.Day);
}
else
{
DateTime lastDay = new DateTime(year, month, CalendarHelpers.DaysInMonth(month, year));
while (lastDay.DayOfWeek != System.DayOfWeek.Saturday && lastDay.DayOfWeek != System.DayOfWeek.Sunday)
{
lastDay = lastDay.AddDays(-1);
}
return(lastDay.Day);
}
}
/// <summary>
/// Gets the xth weekday
/// </summary>
/// <param name="count"></param>
/// <returns></returns>
public static int Weekday(int month, int year, int count)
{
if (count != 5)
{
DateTime firstDay = new DateTime(year, month, 1);
// Get the first weekday
firstDay = JumpToWeekday(firstDay);
// Add the number of days
firstDay = firstDay.AddDays(count - 1);
firstDay = JumpToWeekday(firstDay);
return(firstDay.Day);
}
else
{
DateTime lastDay = new DateTime(year, month, CalendarHelpers.DaysInMonth(month, year));
if (lastDay.DayOfWeek == System.DayOfWeek.Sunday)
{
lastDay = lastDay.AddDays(-2);
}
else if (lastDay.DayOfWeek == System.DayOfWeek.Saturday)
{
lastDay = lastDay.AddDays(-1);
}
return(lastDay.Day);
}
}
/// <summary>
/// Gets the number (1,2,3,4,5) of a certain day (4th Sunday)
/// </summary>
/// <param name="date"></param>
/// <returns></returns>
public static int DayOfWeekNumber(DateTime date)
{
int firstDOW = CalendarHelpers.DayOfWeek(date.Year, date.Month, 1);
int weeks = (int)Math.Ceiling(((double)date.Day + (double)firstDOW) / 7d);
if ((int)date.DayOfWeek + 1 < firstDOW)
{
weeks--;
}
return(weeks);
}
/// <summary>
/// Gets the number of weeks in a month defined by a DateTime.
/// </summary>
/// <param name="date"></param>
/// <returns></returns>
public static int NumberOfWeeks(DateTime date)
{
DateTime lastDay = new DateTime(date.Year, date.Month, CalendarHelpers.DaysInMonth(date.Month, date.Year));
lastDay = lastDay.AddDays(-(lastDay.DayOfWeek - date.DayOfWeek));
if (lastDay.Month != date.Month)
{
lastDay = lastDay.AddDays(-7);
}
DateTime firstDay = new DateTime(date.Year, date.Month, 1);
firstDay = firstDay.AddDays(-(firstDay.DayOfWeek - date.DayOfWeek));
if (firstDay.Month != date.Month)
{
firstDay = firstDay.AddDays(7);
}
return((lastDay.Day - firstDay.Day) / 7 + 1);
}
