Solved

Delphi4 - progress bar usage

Posted on 2007-04-09
4
202 Views
Last Modified: 2010-04-05
Hi

I am using a progressbar while loading treeview from paradox table.
but my problem is that the progress of the bar is not moving with the load operation.meaning that it finishes loading the bar and then loading the tree.
My code is :
try
with progressbar1 do begin
stepit;
BuildTree; // i am callling procedure to load the tree from the table
finally
free
end

so how can i make it move together so when the progress of the bar finishes i will load the tree immidealty not wait for more time and the bar is at the max position

thanks a lot
0
Comment
Question by:ibrobar
  • 2
4 Comments
 
LVL 5

Accepted Solution

by:
xr1140 earned 50 total points
ID: 18875005

1. query the number of record you have to load from the DB

2. set the progressbar max property to that value

3. as soon as each node is loaded, update your progressbar position
0
 
LVL 5

Expert Comment

by:xr1140
ID: 18875013
i almost forgot ... insert an Application.ProcessMessages; in your loop to allow your form to respond to paint message.
0
 
LVL 15

Expert Comment

by:mikelittlewood
ID: 18875317
var
   i, loopVal: integer;
begin
   try
      // open the query
      ADOQuery1.Open;
      // turn off treeview update
      TreeView1.Items.BeginUpdate;
      try
         // get max loop value and max progress bar position
         loopVal := ADOQuery1.RecordCount;
         // set the max of the progress bar
         ProgressBar1.Max := loopVal;
         for i := 1 to loopVal do
         begin
            // add treenode

            // update progress bar
            ProgressBar1.Position := i;
            // let the system catch up
            Application.ProcessMessages;
         end;
      finally
         // turn on treeview
         TreeView1.Items.EndUpdate;
      end;
   except
      // handle exception

   end;
end;
0
 

Author Comment

by:ibrobar
ID: 18897834
Hi All

Sorry for the delay , I will get back to you in couple of days

regards
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

The uses clause is one of those things that just tends to grow and grow. Most of the time this is in the main form, as it's from this form that all others are called. If you have a big application (including many forms), the uses clause in the in…
Hello everybody This Article will show you how to validate number with TEdit control, What's the TEdit control? TEdit is a standard Windows edit control on a form, it allows to user to write, read and copy/paste single line of text. Usua…
Migrating to Microsoft Office 365 is becoming increasingly popular for organizations both large and small. If you have made the leap to Microsoft’s cloud platform, you know that you will need to create a corporate email signature for your Office 365…
Hi friends,  in this video  I'll show you how new windows 10 user can learn the using of windows 10. Thank you.

862 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

Need Help in Real-Time?

Connect with top rated Experts

29 Experts available now in Live!

Get 1:1 Help Now