private void btnPhucHoi_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e) { TaiKhoan obj = bindingSourceTaiKhoan.Current as TaiKhoan; if (obj != null) { if (obj.IsNew) { bindingSourceNhomQuyen.Remove(obj); gridViewTaiKhoan.RefreshData(); } else { obj.CancelChanges(); gridViewTaiKhoan.RefreshData(); } } }