Solved

Add items to TListBox in REVERSE order

Posted on 1998-10-09
4
384 Views
Last Modified: 2011-09-20
I know that to add an item to a TListBox, one simply uses...

ListBox1.Items.Add(Edit1.Text);

However, this adds the new item to the END of the list.  What I am trying to accomplish is to place the new item at the BEGINNING of the list.

IOW, I would like to see this...

ListBox1.Items.Add('1');
ListBox1.Items.Add('2');
ListBox1.Items.Add('3');

...result in the following display in the ListBox...

3
2
1

...instead of the current behavior, which gives me...

1
2
3

What is the best way to accomplish this reverse order?
0
Comment
Question by:Softtech
  • 2
4 Comments
 
LVL 1

Accepted Solution

by:
ow earned 80 total points
ID: 1342380
Hi softtech,

you may use a seperate stringlist first, where you can insert strings at any positon.
Then deliver it to the listbox:

var
  StringList :tStringlist;
  Listbox1 :tListBox;
.
StringList.Insert(0, '1');
StringList.Insert(0, '2');
StringList.Insert(0, '3');
.
ListBox1.Items := StringList;

regards
  ow
0
 
LVL 1

Expert Comment

by:borup
ID: 1342381
Nice solution ;-)
0
 

Author Comment

by:Softtech
ID: 1342382
I still have to .Create and .Free the TStringList, don't I?

Out of curiousity, if I wanted to have take the contents of the StringList, and have it fill the TListBox, would I simply do this?...

MyStringList := TStringList.Create;
.
.
ListBox1.Items.Assign(MyStringList)

???
0
 
LVL 1

Expert Comment

by:ow
ID: 1342383
Softtech,

you are right at all.
You must create and free the stringlist and you can use either "ListBox.Items.Assign(StringList)" or "ListBox.Items := StringList".
Items.Assign is just the method, which is called, when you write to property tListbox.Items.

regards
  ow
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying 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

Suggested Solutions

Title # Comments Views Activity
Delphi procedure  - Unsatisfied forward or external declaration. 2 183
Syntax Check Delphi Seattle IOS app without MAC ? 1 104
Printing problem 2 101
enhance the following code 3 37
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…
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…

808 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