procedure TForm1.Button1Click(Sender: TObject);
var
i:integer;
begin
adoquery1.Open ;
adoquery1.DisableControls ;
adoquery1.First ;
while not adoquery1.Eof do
begin
dbgrid1.SelectedRows.CurrentRowSelected :=true;
adoquery1.Next ;
end;
adoquery1.EnableControls ;
end;