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Tip of the Day
Language: Pascal
Expertise: Beginner
May 8, 1997

WEBINAR:

On-Demand

Application Security Testing: An Integral Part of DevOps


Adding lines to a TStrings Type Property

Question:
What am I doing wrong? I can insert the date and time to a Label component very easily (see first proc below), but not into a RichEdit component. I get three errors as if Delphi is looking for more. Why? And what is missing?
procedure TForm1.FormCreate(Sender: TObject);
begin
 Label1.Caption := DateTimeToStr(Now);
end;


procedure TForm1.RichEdit1Enter(Sender: TObject);
begin
  RichEdit1.Lines.Add := (DateTimeToStr(Now));
end;

Answer:
In your code, list the following:

procedure TForm1.RichEdit1Enter(Sender: TObject);
begin
  RichEdit1.Lines.Add := (DateTimeToStr(Now));
end;
Here's the problem. Add is a function and the string you want to add must be a parameter of that function. So instead of what wrote above, do the following:
procedure TForm1.RichEdit1Enter(Sender: TObject);
begin
  RichEdit1.Lines.Add(DateTimeToStr(Now));
end;
Although this is a pretty simple fix, you'd be amazed at how even seasoned veterans fall prey to this problem.
DevX Pro
 
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