笔记(加强AX对月份操作)

AX 针对日期的操作函数有限,没有像.net那么强大.所以有时候我们还得借助.net.例如对月份的操作

//by kim 20130609
//parm 1 orginal Date
//parm 2 add or decrease mth
//parm 3 flag add or decrease  if true indicate add otherwise decrease
static date AddOrDecreaseMth(date       _originalDate,
                                             int        _mth,
                                             boolean    _direction = true)
{
    System.DateTime         dt;
    date                    transferDate;
    str                     strDate;
    ;
    dt          = new System.DateTime(year    (_originalDate),
                                      mthOfYr (_originalDate),
                                      dayOfMth(_originalDate));
    if(_direction)
    {
        dt      = dt.AddMonths(real2int(abs(_mth)));
    }
    else
    {
        dt      = dt.AddMonths(-real2int(abs(_mth)));
    }
    strDate         = dt.ToShortDateString();
    transferDate    = str2Date(strDate,321);
    if(transferDate != dateNull())
        return transferDate;
    return dateNull();
}