/// <summary>
/// Adds using field to indicate which datetime field to add to.
/// </summary>
/// <param name="dateTime">The date time.</param>
/// <param name="field">The field.</param>
/// <param name="amount">The amount.</param>
/// <returns></returns>
public static DateTimeOffset AddUsingField(this DateTimeOffset dateTime, int field, int amount)
{
switch (field)
{
case DateTimeFieldEnum.MILLISEC:
return(dateTime.AddMilliseconds(amount));
case DateTimeFieldEnum.SECOND:
return(dateTime.AddSeconds(amount));
case DateTimeFieldEnum.MINUTE:
return(dateTime.AddMinutes(amount));
case DateTimeFieldEnum.HOUR_OF_DAY:
return(dateTime.AddHours(amount));
case DateTimeFieldEnum.DATE:
case DateTimeFieldEnum.DAY_OF_MONTH:
return(dateTime.AddDays(amount));
case DateTimeFieldEnum.MONTH:
return(dateTime.AddMonthsLikeJava(amount));
case DateTimeFieldEnum.YEAR:
return(dateTime.AddYears(amount));
default:
throw new ArgumentException("invalid datetime");
}
}
public DateTimeEx AddMonths(int amount, DateTimeMathStyle style = DateTimeMathStyle.CLR)
{
if (style == DateTimeMathStyle.CLR)
{
_dateTime = _dateTime.AddMonths(amount);
}
else
{
_dateTime = _dateTime.AddMonthsLikeJava(amount);
return(Rebase());
}
return(this);
}
