Does anyone know how to get the day of the year for a date like 21/06/2005 ?? I did found some info, but it isn't working.. thnx, Peter
Get day of year
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Get day of year
by pjwolters » Fri, 03 Jun 2005 03:33:22 GMT
Re: Get day of year
by Dodgy » Fri, 03 Jun 2005 03:55:32 GMT
On 1 Jun 2005 11:33:22 -0700, "pjwolters" < XXXX@XXXXX.COM >
waffled on about something:
May I recommend efg's Delphi reference library.
http://www.**--****.com/
I'm not sure if you're after the day of the week, sun-sat, or if you
want to know how many days into the year you are.
If it's day of the week, you just need to work from a known point and
then do a mod7 of the result.
e.g. use Monday, like Jan. 1, 1900 as the known base
DaysSince1900 :=
TRUNC(EncodeDate(year,month,day)) -
TRUNC(EncodeDate(1900,1,1)) + 1;
DayOfWeek := DaysSince1900 MOD 7;
// (0=Sunday, 1=Monday, ..., 6=Saturday):
If you're after how far you are into the year in days, then just set
the base as being the 1st of Jan of the year you are interested in.
Daynum:=TRUNC(EncodeDate(year,month,day)) -
TRUNC(EncodeDate(year,1,1)) + 1;
Do either of those help?
Dodgy.
--
MUSHROOMS ARE THE OPIATE OF THE MOOSES
Re: Get day of year
by pjwolters » Fri, 03 Jun 2005 05:00:09 GMT
Yeah Thanks! I was indeed looking for the number of day in that year, it'sworking perfectly, Thnx, Peter
Re: Get day of year
by Dodgy » Fri, 03 Jun 2005 18:26:41 GMT
On 1 Jun 2005 13:00:09 -0700, "pjwolters" < XXXX@XXXXX.COM > waffled on about something: It's worth getting to grips with Delphi's Tdatetime type, it's quite a useful one. It's the number of days since 12:00 am 30th December 1899. So if you add 1 to a Tdatetime you'll have the date for the next day. The crafty thing is it also has the hours and minutes part for fractions of the day. So if you wanted to know what the time would be in 12 hours time you just take the current time in Tdatetime format (oh looks, there's one provided for you, it's called NOW), and add 12 hours to it... 12 Hours is half a day, so that's NOW+0.5. All that's left is to display the new time. datetimetostr does that for you. Dodgy. -- MUSHROOMS ARE THE OPIATE OF THE MOOSES
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3.Identify the first day of the current year and month
Hi
I have a table that contains orders information.
I need to filter the table to add all orders:
a) between the start of the year (Jan 1 of the current year)
and the current date (today) Year-to-date
b) between the start of the current month (Day 1) and the
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year-to-date and the month-to-date
if (DateTimePicker3->Date > DateTimePicker2->Date)
{
Table1->Filtered = false;
Table1->Filter = "Date > '" + DateTimePicker2->DateTime.FormatString(ShortDateFormat) + "'" + "AND Date < '" + DateTimePicker3->DateTime.FormatString(ShortDateFormat) + "'";
Table1->Filtered = true;
}
thanks in advance
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