In the fuction, the event argument e is changed, but the rows i want to reserve are still deleted by the ultragrid.

        protected override void OnBeforeRowsDeleted(BeforeRowsDeletedEventArgs e)
        {
            if (MsgHelper.Confirm("是否确定删除选中的行?"))
            {
                List<UltraGridRow> listRow = new List<UltraGridRow>();
                for (int i = e.Rows.Length - 1; i >= 0; i--)
                {
                    if (e.Rows[i].IsAddRow) continue;
                    Details detail = e.Rows[i].ListObject as Details;
                    if (detail.Id != 0)                                         // Some details.Id aren't equal to 0
                    {
                        e.Rows[i].Hidden = true;
                        detail.Deleted = true;
                    }
                    else
                        listRow.Add(e.Rows[i]);
                }
                e = new BeforeRowsDeletedEventArgs(listRow.ToArray(), false);
                MsgHelper.Info("数据已删除成功.");
            }
            else
            {
                MsgHelper.Info("操作已取消.");
                e.Cancel = true;
            }

            base.OnBeforeRowsDeleted(e);
        }