flex grid refresh

here refresh samples of posible grid refresh calls

                private function refresh():void{
                                MyDataProvider.MyDataArrayCollection.refresh();
                                myGrid.data=MyDataProvider.MyDataArrayCollection;
                                myGrid.invalidateList();
                                myGrid.invalidateDisplayList();
                                myGrid.dataProvider.refresh;
                                myGrid.executeBindings(false);
                                ArrayCollection(myGrid.dataProvider).refresh();
                        }