AddMonths()

DateTime System.Globalization.GregorianCalendarHelper.AddMonths ( DateTime time, int months )

inline

Definition at line 196 of file GregorianCalendarHelper.cs.

    {
        if (months < -120000 || months > 120000)
        {
            throw new ArgumentOutOfRangeException("months", SR.Format(SR.ArgumentOutOfRange_Range, -120000, 120000));
        }
        CheckTicksRange(time.Ticks);
        int datePart = GetDatePart(time.Ticks, 0);
        int datePart2 = GetDatePart(time.Ticks, 2);
        int num = GetDatePart(time.Ticks, 3);
        int num2 = datePart2 - 1 + months;
        if (num2 >= 0)
        {
            datePart2 = num2 % 12 + 1;
            datePart += num2 / 12;
        }
        else
        {
            datePart2 = 12 + (num2 + 1) % 12;
            datePart += (num2 - 11) / 12;
        }
        int[] array = ((datePart % 4 == 0 && (datePart % 100 != 0 || datePart % 400 == 0)) ? DaysToMonth366 : DaysToMonth365);
        int num3 = array[datePart2] - array[datePart2 - 1];
        if (num > num3)
        {
            num = num3;
        }
        long ticks = DateToTicks(datePart, datePart2, num) + time.Ticks % 864000000000L;
        Calendar.CheckAddResult(ticks, m_Cal.MinSupportedDateTime, m_Cal.MaxSupportedDateTime);
        return new DateTime(ticks);
    }

References System.SR.ArgumentOutOfRange_Range, System.array, System.Globalization.Calendar.CheckAddResult(), System.Globalization.GregorianCalendarHelper.CheckTicksRange(), System.DateTime, System.Globalization.GregorianCalendarHelper.DateToTicks(), System.Globalization.GregorianCalendarHelper.DaysToMonth365, System.Globalization.GregorianCalendarHelper.DaysToMonth366, System.SR.Format(), System.Globalization.GregorianCalendarHelper.GetDatePart(), System.L, System.Globalization.GregorianCalendarHelper.m_Cal, System.Globalization.Calendar.MaxSupportedDateTime, System.Globalization.Calendar.MinSupportedDateTime, and System.DateTime.Ticks.

Referenced by System.Globalization.JapaneseCalendar.AddMonths(), System.Globalization.KoreanCalendar.AddMonths(), System.Globalization.TaiwanCalendar.AddMonths(), System.Globalization.ThaiBuddhistCalendar.AddMonths(), and System.Globalization.GregorianCalendarHelper.AddYears().