Thanks all for the help. I think I will use a static array and limit the
numbers.
I have another newbie question. What is the standard way of internally storing
data attached to a listbox item.
ie. I have a listbox which has user defined items that can be added & deleted.
For each of the items I need to display/store particular information.
eg. On the left I have a Listbox containing account numbers and on the right I
have edit boxes containing Name, Address etc.
Can I use the Items.Objects property to link each item to another object in
this case? Or do I simply store the Name/Address data in a string array
indexed on the ItemIndex. That creates a problem when the user deletes an item
from the list -- I would have to move the data around in the array which I
would rather not do. Maybe I should use the item Tag property to store the
index of the related array data.
(BTW: The data will eventually be saved to a text file)
Thanks,
Ross.
Sergei Stenkov wrote:
> Hello all
>
> Ross,
>
> Just 2c of mine:
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> var
> i : Integer;
> aList: Array of TStringList;
> begin
> try
> for i := 0 to xxxxxx do begin
> SetLength(aList, i + 1);
> aList[i] := TStringList.Create;
> end;
>
> // do your what you need
> finally
> if Length(aList) > 0 then
> for i := Low(aList) to High(aList) do
> if aList[i] <> nil then
> // Clean up the objects
> aList[i].Free;
> Finalize(aList); //Uninitializes a dynamically allocated variable
> end;
> end;
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Best regards,
> Sergei Stenkov
>
> > I was hoping the following would work but it appears not. It compiles
> > OK but produces memory errors at runtime. Why doesn't the compiler
> > complain if TSringList can't be used in an array?
> >
> > var
> > Categories : array of TStringList;
> > begin
> > Categories[0] := TStringList.Create;
> > end;
> >
> > Cheers,
> > Ross.
>
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