internal virtual int GetDatePart(DateTime time, int part)
{
int HijriYear = 0;
int HijriMonth = 0;
int HijriDay = 0;
UmAlQuraCalendar.CheckTicksRange(time.Ticks);
UmAlQuraCalendar.ConvertGregorianToHijri(time, ref HijriYear, ref HijriMonth, ref HijriDay);
if (part == 0)
{
return(HijriYear);
}
if (part == 2)
{
return(HijriMonth);
}
if (part == 3)
{
return(HijriDay);
}
if (part == 1)
{
return((int)(UmAlQuraCalendar.GetAbsoluteDateUmAlQura(HijriYear, HijriMonth, HijriDay) - UmAlQuraCalendar.GetAbsoluteDateUmAlQura(HijriYear, 1, 1) + 1L));
}
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_DateTimeParsing"));
}
/// <summary>返回设置为指定的日期、时间和纪元的 <see cref="T:System.DateTime" />。</summary>
/// <returns>设置为当前纪元中的指定日期和时间的 <see cref="T:System.DateTime" />。</returns>
/// <param name="year">年份。</param>
/// <param name="month">1 到 12 之间的一个整数，用于表示月。</param>
/// <param name="day">1 到 29 之间的一个整数，用于表示日。</param>
/// <param name="hour">0 到 23 之间的一个整数，用于表示小时。</param>
/// <param name="minute">0 到 59 之间的一个整数，用于表示分钟。</param>
/// <param name="second">0 到 59 之间的一个整数，用于表示秒。</param>
/// <param name="millisecond">0 到 999 之间的一个整数，用于表示毫秒。</param>
/// <param name="era">纪元。指定 UmAlQuraCalendar.Eras[UmAlQuraCalendar.CurrentEra] 或 <see cref="F:System.Globalization.UmAlQuraCalendar.UmAlQuraEra" />。</param>
/// <exception cref="T:System.ArgumentOutOfRangeException">
/// <paramref name="year" />、<paramref name="month" />、<paramref name="day" /> 或 <paramref name="era" /> 超出了 <see cref="T:System.Globalization.UmAlQuraCalendar" /> 类支持的范围。- 或 -<paramref name="hour" /> 小于零或大于 23。- 或 -<paramref name="minute" /> 小于零或大于 59。- 或 -<paramref name="second" /> 小于零或大于 59。- 或 -<paramref name="millisecond" /> 小于零或大于 999。</exception>
public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era)
{
if (day >= 1 && day <= 29)
{
UmAlQuraCalendar.CheckYearMonthRange(year, month, era);
}
else
{
int daysInMonth = this.GetDaysInMonth(year, month, era);
if (day < 1 || day > daysInMonth)
{
throw new ArgumentOutOfRangeException("day", string.Format((IFormatProvider)CultureInfo.CurrentCulture, Environment.GetResourceString("ArgumentOutOfRange_Day"), (object)daysInMonth, (object)month));
}
}
long absoluteDateUmAlQura = UmAlQuraCalendar.GetAbsoluteDateUmAlQura(year, month, day);
if (absoluteDateUmAlQura >= 0L)
{
return(new DateTime(absoluteDateUmAlQura * 864000000000L + Calendar.TimeToTicks(hour, minute, second, millisecond)));
}
throw new ArgumentOutOfRangeException((string)null, Environment.GetResourceString("ArgumentOutOfRange_BadYearMonthDay"));
}
/// <summary>计算与指定初始日期相距指定月数的日期。</summary>
/// <returns>在将 <paramref name="months" /> 参数指定的月数加到 <paramref name="time" /> 参数指定的日期后所得的日期。</returns>
/// <param name="time">要加上月数的日期。<see cref="T:System.Globalization.UmAlQuraCalendar" /> 类仅支持从 04/30/1900 00.00.00（公历日期）到 11/16/2077 23:59:59（公历日期）的日期。</param>
/// <param name="months">要添加的正月数或负月数。</param>
/// <exception cref="T:System.ArgumentException">得到的日期不在 <see cref="T:System.Globalization.UmAlQuraCalendar" /> 类支持的范围内。</exception>
/// <exception cref="T:System.ArgumentOutOfRangeException">
/// <paramref name="months" /> 小于 -120,000 或大于 120,000。- 或 -<paramref name="time" /> 超出了此日历支持的范围。</exception>
public override DateTime AddMonths(DateTime time, int months)
{
if (months < -120000 || months > 120000)
{
throw new ArgumentOutOfRangeException("months", string.Format((IFormatProvider)CultureInfo.CurrentCulture, Environment.GetResourceString("ArgumentOutOfRange_Range"), (object)-120000, (object)120000));
}
int datePart1 = this.GetDatePart(time, 0);
int datePart2 = this.GetDatePart(time, 2);
int day = this.GetDatePart(time, 3);
int num = datePart2 - 1 + months;
int month;
int year;
if (num >= 0)
{
month = num % 12 + 1;
year = datePart1 + num / 12;
}
else
{
month = 12 + (num + 1) % 12;
year = datePart1 + (num - 11) / 12;
}
if (day > 29)
{
int daysInMonth = this.GetDaysInMonth(year, month);
if (day > daysInMonth)
{
day = daysInMonth;
}
}
UmAlQuraCalendar.CheckYearRange(year, 1);
DateTime dateTime = new DateTime(UmAlQuraCalendar.GetAbsoluteDateUmAlQura(year, month, day) * 864000000000L + time.Ticks % 864000000000L);
Calendar.CheckAddResult(dateTime.Ticks, this.MinSupportedDateTime, this.MaxSupportedDateTime);
return(dateTime);
}
