Question

Compare DateTimePicker with Now

Asked by: CodedK

Hi.

How can i compare if
DateTimePicker> Now + 60sec ?

Thanks.

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Asked On
2005-09-14 at 04:59:26ID21560918
Tags

datetimepicker

Topic

Delphi Programming

Participating Experts
3
Points
200
Comments
15

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Answers

 

by: kaslaPosted on 2005-09-14 at 05:59:29ID: 14880296

if
datetimepicker1.DateTime>  incminute(now, 1)
then showmessage('DateTimePicker > Now + 60sec : true ')
else showmessage(' 'DateTimePicker > Now + 60sec :false  ');

 

by: kaslaPosted on 2005-09-14 at 06:03:56ID: 14880330

in order to use incminute function you need to include DateUtils (uses DateUtils;)

you can also use incsecond function


if
datetimepicker1.DateTime>  IncSecond(now, 60)
then showmessage('DateTimePicker > Now + 60sec : true ')
else showmessage(' 'DateTimePicker > Now + 60sec :false  ');

 

by: RadikalQ3Posted on 2005-09-14 at 06:18:48ID: 14880461

Hi!

If you dont want/can use DateUtils, you can use:

procedure TForm1.Button3Click(Sender: TObject);
begin
  if DateTimePicker1.DateTime > ( Now+StrToTime('00:01:00') )
  then ShowMessage('Yes, greater')
  else ShowMessage('No');
end;

 

by: CodedKPosted on 2005-09-14 at 06:19:14ID: 14880466


If DateTimePicker2.Time<incminute(now, 1)  then
 Begin
 ShowMessage('Please choose a time that is, at least'+#10#13+
 '60 seconds before the current system time.');
 End Else
 ShowMessage('Time ok.');

I'm doing this and no matter what i put in the DateTimePick i get the message with the error.

 

by: CodedKPosted on 2005-09-14 at 06:25:56ID: 14880509

@ RadikalQ3

If DateTimePicker1.Time<Now+StrToTime('00:01:00') then
 begin
 ShowMessage('Wrong');
 End Else ShowMessage('Ok');

I always get Wrong.

Is it a problem that i have DateTimePicker setted 24h (HH:mm:ss) ?

 

by: RadikalQ3Posted on 2005-09-14 at 06:30:35ID: 14880551

No... the problem is that you are using DateTimePicker1.Time instead of DateTimePicker.DateTime

You have 2 options:

If DateTimePicker1.Time<Time+StrToTime('00:01:00')

Or

If DateTimePicker1.DateTime<Now+StrToTime('00:01:00')

Now include the actual date + Actual time  :)

 

by: RadikalQ3Posted on 2005-09-14 at 06:32:46ID: 14880567

Date : Actual date
Time : Actual Time
Now : Actual date + Actual Time

 

by: CodedKPosted on 2005-09-14 at 06:37:17ID: 14880606

Ok.

procedure TForm1.Button2Click(Sender: TObject);
begin
 If DateTimePicker1.Time<Time+StrToTime('00:01:00') then
 begin
 ShowMessage('Wrong');
 End Else ShowMessage('Ok');
end;

Now what ever i do it shows ok. !!!

 

by: RadikalQ3Posted on 2005-09-14 at 06:38:53ID: 14880625

:)

 

by: CodedKPosted on 2005-09-14 at 06:45:41ID: 14880705

!!! ??
Try this with (< or = or >):

If i put < or = i ALWAYS get ok
If i put > i always get Wrong... No matter what is in the Picker.

procedure TForm1.Button1Click(Sender: TObject);
begin
 If DateTimePicker1.Time>Time then
 begin
 ShowMessage('Wrong');
 End Else ShowMessage('Ok');
end;

 

by: RadikalQ3Posted on 2005-09-14 at 06:56:42ID: 14880806

Huffff :) too many caffeine today :)

The property DateTimePicker.Time is DateTime so... you must compare with other DateTime.

In your last example:

procedure TForm1.Button1Click(Sender: TObject);
begin
 If DateTimePicker1.Time>Now then
 begin
 ShowMessage('Wrong');
 End Else ShowMessage('Ok');
end;


 

by: kaslaPosted on 2005-09-14 at 07:09:23ID: 14880913

I suppose that you change only time, so maybe you have wrong date in date property
try with this

procedure TForm1.Button1Click(Sender: TObject);
begin
datetimepicker1.Date:=now;
If DateTimePicker1.Time>now then
 begin
 ShowMessage('Wrong');
 End Else ShowMessage('Ok');
end;

 

by: BlackTigerXPosted on 2005-09-14 at 07:19:56ID: 14881007

procedure TForm2.Button1Click(Sender: TObject);
begin
  if (Frac(DateTimePicker1.Time)>Time-(1/24/60)) then
    ShowMessage('pick a time that is at least 60 secs before current time')
  else
    ShowMessage('ok')
end;

 

by: CodedKPosted on 2005-09-14 at 08:45:34ID: 14881782

@RadikalQ3 :)
I did drink a lot coffe today thats true.
But in the last..last example (If DateTimePicker1.Time>Time then...)
I compare Time with Time. And again i got the same results no matter what was in the
DateTimePicker... :/
--------------------------------
@kasla
CurrentTimer Enabled= True
procedure TForm1.CurrentTimer(Sender: TObject);
begin
DateTimePicker1.DateTime:=Now;
end;

I have this code to show the time goes before user clicks on DateTimePicker. Then CurrentTimer stops.
So i allready got time and date set to current time and date. But i stille get the wrong results.
--------------------------------
@BlackTigerX

It works :)
--------------------------------

Thank you all for your time.
I dont know if i did something wrong... But i've tried to fix the code as you suggested. :/

 

by: BlackTigerXPosted on 2005-09-14 at 20:27:20ID: 14886605

CodedK-

do you know why my code works?
...just in case, I'll just say

datetimes in Delphi are stored in a float kind of numbers, the integer part represents the days, the fraccional part the time,  (that's why I did Fracc(DateTimePicker1.DateTime), to pick only the time) in fractions of a day
so
1/24=1 hour
1/24/60=1 minute

20120131-EE-VQP-002

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