任何人都可以检查，我在哪里弄错了，为什么下载期间我得到了空记录。请看看我的代码。

    public function selloutitem_search(Request $request)
    {
        $dstart = $request->get('dstart');
        $dstop = $request->get('dstop');
        $cat = $request->get('cat');
        $branch = $request->get('branch');

        $ddstart = date('Y-m-d',strtotime($dstart));  
        $ddstop = date('Y-m-d',strtotime($dstop));  

        $Sellout = DB::table('Sellout')
                ->Where('custom2',$cat)
                ->Where('Code',$branch)
                ->whereBetween('docket_date',[$ddstart,$ddstop])
                //->orderBy('description','asc');
                //->paginate(100);
                ->get();

          foreach ($Sellout as $order) 
          {
                $data[] = array(
                    "Barcode"=> $order->Barcode,);
          }

        return Excel::download($data,'report.xlsx');
    }