Question

Is there any method to have a higher maximum character other than the Tmemo?

Asked by: fhtong

I use Tmemo to work around text and it seems that the maximum is below 20,000 characters. It is said that the reason is the edit control of Windows.
Is there any other way to overcome this limitation?

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Asked On
2005-09-13 at 07:37:29ID21559686
Tags

tmemo

,

windows

Topic

Delphi Programming

Participating Experts
3
Points
500
Comments
6

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Answers

 

by: RadikalQ3Posted on 2005-09-13 at 07:45:49ID: 14872202

Hi!

20.000 characters?... this is not true...

You can test this code to fill a TMemo:

procedure TForm1.Button1Click(Sender: TObject);
var
  n : integeR;
begin
  for n:=0 to 5000 do begin
    Memo1.Lines.Add( IntToStr(N)+':'+StringOfChar('X',100 ) );
  end;
end;

5000 lines of 100 characters (plus the inttostr) and without problems... :?

 

by: mnasmanPosted on 2005-09-13 at 07:56:23ID: 14872314

RadikalQ3 is right, there's no limitation for TMemo around 20k char

I think it had only limitation on win 95/98 for text files around 64kb (3 times more than what u said)

If you work with large text files, and would to load them fast I suggest you to try SynEdit, it will allow you to highlight the keywords for many languages too
http://synedit.sourceforge.net/

 

by: fhtongPosted on 2005-09-13 at 08:22:25ID: 14872606

Thanks.

I have tried according to RadikalQ3's suggestion. It went through. So I must have something wrong for the follow up process.
By the way, is the limitation for Win 2000 and XP higher than 64kb?

fhtong

 

by: mnasmanPosted on 2005-09-13 at 09:40:30ID: 14873398

there's no limitation  for win2k and xp, except the memory available

 

by: RadikalQ3Posted on 2005-09-13 at 09:45:55ID: 14873451

>except the memory available

I think that the limit is 2 GB, because the TStrings use integer for manage the capacity


 

by: kretzschmarPosted on 2005-09-14 at 23:19:51ID: 14887059

puh all just guessing

there is a default limit set defined in the OS
(just because TMemo/TRichEdit is just a control-wrapper,
this has nothing to do with the TStrings-capacity)

read (richedit)
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/commctls/richedit/richeditcontrols/richeditcontrolreference/richeditmessages/em_exlimittext.asp

read (other like TMemo, TListBox, etc.)
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/commctls/editcontrols/editcontrolreference/editcontrolmessages/em_limittext.asp

em_exlimittext, em_limittext are the api-messages to adjust the limit (lower/higher) as the default setting

meikl ;-)

20120131-EE-VQP-002

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