Re: [DUG] Enable CheckBox

Mon, 26 Apr 2010 16:41:49 -0700

Hi Bob
I'd use
if DBEdit2.Text <> '' then
DBCheckBox4.Enabled := true
else
DBCheckBox4.Enabled := false

Ian


On 27/04/2010 10:52 a.m., David O'Brien wrote:

Why the four quotes in the false and a space in the true?

 

I would use something like:

 

DBCheckBox4.Enabled := not (DBEdit2.Text = '') ;

 

From: delphi-boun...@delphi.org.nz [mailto:delphi-boun...@delphi.org.nz] On Behalf Of Bob Pawley
Sent: Tuesday, 27 April 2010 10:39 a.m.
To: NZ Borland Developers Group - Delphi List
Subject: [DUG] Enable CheckBox

 

Hi

 

I am attempting to enable a checkbox only when a DBEdit has a value. (Disabled when no string in DBEdit.)

 

Following is my code which disables the CheckBox after a delete from the DBEdit.

 

But it is not enabled when I add a string to the DBEdit.

------

procedure TForm4.DBEdit2Change(Sender: TObject);
begin

 

     if
  DBEdit2.Text = ' '

 

  then
  DBCheckBox4.Enabled := True

 

  Else if DBEdit2.Text = ''''

 

  then
   DBCheckBox4.Enabled := False ;

 

end;

 

Thanks for any help.

 

Bob


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