How to implement a Thread to allow cancellation of Stringgrid fill in Delphi?

Question

I load spreadsheets in a Stringgrid and then insert them in the bank, wanted a thread to allow to cancel this import, that is to cancel the completion of stringGrid, the button is "Inclicavel" as you already know, until the completion of the filling. Detail, I show this Rectangle and a progression just for the user to follow. And he won’t be able to touch the system while it matters, he can just cancel Does anyone have any idea how I can make this thread to fill in Stringgrid?

Answer 1

You must be using some repeating structure for the right fill?

If it is while, for... you can implement a Break.

for i := 0 to Pred(Registros.Count) do
begin
  if (vCancelar = True) then {seria definida como True no click do botão cancelar}
  begin
    Break;
  end;
end;

If you’re riding a DataSet then position it at the end of the Records.

About the Button being "tiltable" is failure of your application, as I imagine you are using a repeat structure, whatever, ALWAYS at the beginning or at the end of any add iteration:

Application.ProcessMessages;

This way the application can breathe while the processor runs the methods at home iteration.