Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

TDateTime

Posted on 2000-04-25
8
Medium Priority
?
458 Views
Last Modified: 2010-04-04
Hi,
I have a problem with "mixing" a Date (given from a TMonthCalendar) and a Time (given indirectly from a TEdit) to one TDateTime-Value.

The MonthCalendar returns a TDateTime-Value with the current or specified Date (which is good) and also with the current Time (which is no good)

eg. 25.04.00, 15:54:00

and the StrToTime(Edit1.Text) returns the Time only (which is enough for me)

31.12.1899 (or something), 16:00:00

but when i simply add those two DateTime-Values I get something completly weird. So how would i mix the Date from the MonthCalendar with the Time from the Editbox to

25.04.00, 16:00:00

I think it cant be that hard, but im not really familiar with TDateTime...
0
Comment
Question by:omsec
8 Comments
 
LVL 2

Expert Comment

by:craig_capel
ID: 2747619
edit1.text:=datetimetostr(now);

Try that...
0
 
LVL 5

Accepted Solution

by:
TheNeil earned 40 total points
ID: 2747638
Try this:

dtTime := StrToTime(Edit1.Text);
dtDate := MonthCalendar.Date;

dtFinal := TRUNC(dtDate) + (dtTime - TRUNC(dtTime));

What it does is use the time from your edit box and the date from your calendar component. TDateTime is basically a real value, with the integer part specifying the date, and the fractional part specifying the time. The above code just adds them together

The Neil =:)
0
 
LVL 27

Expert Comment

by:kretzschmar
ID: 2747674
the neil, you just said it

dtTime := StrToTime(Edit1.Text);
dtDate := MonthCalendar.Date;

dtFinal := TRUNC(dtDate) + (FRAC(dtTime));

meikl

0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
LVL 5

Expert Comment

by:TheNeil
ID: 2747749
Either I got it right or there's someone else out there as confused and lost as I am

The Neil =;)

PS. Thanks for pointing out FRAC - I didn't know about that
0
 

Expert Comment

by:CoreEye
ID: 2748007
U can try this;

strTime:string;
strDate:string;
dtFinal : TDateTime;

strTime := Edit1.Text;
strDate := DateToStr(MonthCalendar.Date);

dtFinal := StrToDateTime(strDate + ' ' + strTime);


0
 
LVL 2

Author Comment

by:omsec
ID: 2750277
i think theNeil gave me the pointer :)
I'm gonna test it now...
0
 
LVL 2

Author Comment

by:omsec
ID: 2750496
CoreEye: The solution using numeric data types only might be more efficient since the CPU proceeds operations faster on these types than it does on strings - TheNeil's code does the job fine and quickly and he posted his text first, i think he deserved the points, altought it's not much :)
0
 
LVL 5

Expert Comment

by:TheNeil
ID: 2750530
Thanks Omsec. All points gratefully received

The Neil =;)
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A lot of questions regard threads in Delphi.   One of the more specific questions is how to show progress of the thread.   Updating a progressbar from inside a thread is a mistake. A solution to this would be to send a synchronized message to the…
In this tutorial I will show you how to use the Windows Speech API in Delphi. I will only cover basic functions such as text to speech and controlling the speed of the speech. SAPI Installation First you need to install the SAPI type library, th…
Want to learn how to record your desktop screen without having to use an outside camera. Click on this video and learn how to use the cool google extension called "Screencastify"! Step 1: Open a new google tab Step 2: Go to the left hand upper corn…
Whether it be Exchange Server Crash Issues, Dirty Shutdown Errors or Failed to mount error, Stellar Phoenix Mailbox Exchange Recovery has always got your back. With the help of its easy to understand user interface and 3 simple steps recovery proced…

824 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question