How to draw an empty cell using TDBGrid?

Question

I'm trying to display an empty text for a TDBGrid's cell without changing the field's value neither the backcolor of the cell. I'm not sure it's the right approach but I've tried using the OnDrawDataCell event as follows:

procedure TMyForm.MyGridDrawDataCell(Sender: TObject;
  const Rect: TRect; Field: TField; State: TGridDrawState);
var
    Grid : TDBGrid;
begin
  inherited;
  if(Field.FieldName = 'MYFIELD') then
  begin
    Grid := Sender as TDBGrid;
    Grid.Canvas.FillRect(Rect);
  end;
end;

After placing a breakpoint into the event, I've noticed that it's never executed

Fabrizio Fabrizio · Accepted Answer · 2017-02-27T14:19:08

Resolved using OnDrawColumnCell event handler instead of the obsolete OnDrawDataCell

As documentation says:

Do not write an OnDrawDataCell event handler. OnDrawDataCell is obsolete and included for backward compatibility. Instead, write an OnDrawColumnCell event handler.

How to draw an empty cell using TDBGrid?

1 Answers