Solved

Datetime diference?

Posted on 2002-07-20
6
247 Views
Last Modified: 2010-04-04
I have two datetime strings in 2 edit boxes. How can I find the number of hours between these two values even if it exceeds 24 hrs.

eg: 7/21/2002 1:15:25 AM minus 7/22/2002 2:15:28 PM

thnks
0
Comment
Question by:drnadeem
6 Comments
 
LVL 7

Accepted Solution

by:
Cynna earned 50 total points
ID: 7167199
Very simple:

function HoursDifference(StartDateTime, EndDateTime: String): Integer;
var d1,d2: TDateTime;
begin
  DateSeparator:='/';  ShortDateFormat:='mm/dd/yyyy';
  TimeSeparator:=':';  LongTimeFormat:='h:m:s';
  d1:=StrToDateTime(StartDateTime);
  d2:=StrToDateTime(EndDateTime);
  Result:=Round((d2-d1)*24);
end;

//DEMO:
//---------

procedure TForm1.Button1Click(Sender: TObject);
begin
  ShowMessage('The difference between '+Edit1.Text+' and '+Edit2.Text+' is '+
              IntToStr(HoursDifference(Edit1.Text, Edit2.Text))+' hours.');
end;
0
 
LVL 12

Expert Comment

by:Lee_Nover
ID: 7167371
drdaem if you have Delphi6 then you can use the DateUtils unit and the HoursBetween function
there are also DaysBetween, SecondsBetween, ... check out the DateUtils unit :)
0
 

Expert Comment

by:Chalo
ID: 7167933
Try this:
Edit3.Text := DateTimeToStr((StrToDateTime(Edit1.Text) -              StrToDateTime(Edit2.Text))/24);
0
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.

 
LVL 7

Expert Comment

by:Cynna
ID: 7168103
Chalo,

Did you tried out your proposed answer?

I see you are new to EE. Proposing an answer is generally not considered a good practice here. But if you propose it anyway, you should be sure it works, and it's a different one than other poster suggested. In this case, neither is true.
In the future, please consider posting a comment and let the asker choose the right answer for himself.
0
 
LVL 27

Expert Comment

by:kretzschmar
ID: 7170133
only a b-grade for a perfect work ?

:-(
0
 
LVL 7

Expert Comment

by:Cynna
ID: 7170220
:-) ...

0

Featured Post

Active Directory Webinar

We all know we need to protect and secure our privileges, but where to start? Join Experts Exchange and ManageEngine on Tuesday, April 11, 2017 10:00 AM PDT to learn how to track and secure privileged users in Active Directory.

Question has a verified solution.

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

This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
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…
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…

821 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