An automated way to delete the list is:
if cb_pin_function.dropdown.cols.rowcount > 0 then
for i:=1 to cb_pin_function.dropdown.cols.rowcount do
cb_pin_function.dropdown.cols.deleterow(0);
On Thu, Mar 18, 2021 at 9:57 PM vasi vasi <[email protected]> wrote:
> Of course, at runtime.
>
> let's say we have the following combobox:
> cb_pin_function: tdropdownlistedit;
>
> Now, if you need to dynamically populate (and at a later time, delete) the
> dropdown list, you do it as below. I do this because there is no wiki or
> documentation for msegui.
>
> var a:array [1..5] of msestring;
> begin
> a[1] := 'Row 1';
> a[2] := 'Row 2';
> a[3] := 'Row 3';
> a[4] := 'Row 4';
> a[5] := 'Row 5';
> // adding rows in the dropdown
> cb_pin_function.dropdown.cols.addrow(a[1]);
> cb_pin_function.dropdown.cols.addrow(a[2]);
> cb_pin_function.dropdown.cols.addrow(a[3]);
> cb_pin_function.dropdown.cols.addrow(a[4]);
> cb_pin_function.dropdown.cols.addrow(a[5]);
>
> // setting a current index in combobox dropdown
> cb_pin_function.dropdown.itemindex:=0;
>
> // if you need to empty the dropbox list, you can do it as below
> cb_pin_function.dropdown.cols.deleterow(0);
> cb_pin_function.dropdown.cols.deleterow(0);
> cb_pin_function.dropdown.cols.deleterow(0);
> cb_pin_function.dropdown.cols.deleterow(0);
> cb_pin_function.dropdown.cols.deleterow(0);
> // the number of delete operations cannot be bigger than the number of
> added rows
> end;
>
> I discovered this by trial and error and of a big help to me is Visual
> Studio Code editor, with pascal extensions that provide autocompletion and
> list of suggestions.
>
> --
> Vasi
>
--
Vasi
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