WinFrom异步加载数据，不卡主线程

private async Task GetPackageNo(string mo)
        {
            await Task.Run(() =>
            {
                DataTable main_dt=new DataTable();
                int Count = int.Parse(ADO.ExecuteScalar($"SELECT COUNT(*) FROM SHELL_BIND_CELL WHERE SHELL_BARCODE in(SELECT b.BARCODE FROM PACK_MAIN a LEFT JOIN PACK_DETAIL b  ON a.PACK_NO=b.PACK_NO WHERE a. MO='{mo}')").ToString());
                if (Count == 0)
                {
                    ADO.sqlString = $"SELECT a.MO AS 生产工单, a.PACK_NO AS 箱号,b.BARCODE AS 电芯 FROM PACK_MAIN a LEFT JOIN PACK_DETAIL b  ON a.PACK_NO=b.PACK_NO WHERE a. MO='{mo}' order by a.id";
                    main_dt = ADO.ExecuteDataTable(ADO.sqlString);
                    
                }
                this.BeginInvoke(new Action(() =>
                {
                    gridControl13.DataSource = main_dt;
                }));
            });
        }