POS打印機的Flex報告打印

Question

我們正在嘗試將打印餐館賬單打印到POS打印機。我們在FLEX中設計了一個完整的a4尺寸的帳單並設法將其打印到POS打印機。我知道這不是最佳做法。有人可以幫助我們，讓我們知道什麼是最佳做法。

下面是我們使用的代碼。有一點幫助是非常感謝。

<?xml version="1.0" encoding="utf-8"?> 
<mx:VBox xmlns:fx="http://ns.adobe.com/mxml/2009" 
     xmlns:s="library://ns.adobe.com/flex/spark" 
     xmlns:mx="library://ns.adobe.com/flex/mx" 
     xmlns:prints="printing.*" 
     xmlns:ProComp="ProComp.*" 
     xmlns:WrbComp="WrbComp.*" 
     width="580" height="338" creationComplete="onCreationComplete()" fontSize="4" 
     horizontalAlign="left" horizontalScrollPolicy="off" 
     implements="COM.pro.printing.IPrintableDocument" styleName="printPageStyle" 
     verticalScrollPolicy="off"> 
    <fx:Declarations> 
     <!-- Place non-visual elements (e.g., services, value objects) here --> 
     <mx:NumberFormatter id="Rod2" precision="2" rounding="nearest" /> 
     <mx:NumberFormatter id="Rod4" precision="4" rounding="nearest" /> 
     <mx:NumberFormatter id="mxNumFormatter2" useThousandsSeparator="true" thousandsSeparatorFrom="," precision="2" decimalSeparatorFrom="." /> 
    </fx:Declarations> 
    <fx:Script> 
     <![CDATA[ 
      import COM.pro.printing.PrintPreviewControl; 

      import Common.*; 

      import WrbComp.BillCompKot; 

      import flashx.textLayout.conversion.ConversionType; 
      import flashx.textLayout.formats.Float; 

      import mx.collections.ArrayCollection; 
      import mx.collections.ArrayList; 
      import mx.controls.AdvancedDataGrid; 
      import mx.controls.Alert; 
      import mx.core.Application; 
      import mx.events.PropertyChangeEvent; 
      import mx.messaging.SubscriptionInfo; 
      import mx.rpc.events.HeaderEvent; 
      import mx.rpc.mxml.Concurrency; 
      import mx.utils.StringUtil; 

      [Bindable] public var accounts:ArrayCollection; 
      [Bindable] public var currentPageNumber:Number = 1; 
      [Bindable] public var pageCount:Number = 1; 
      public var _parentObj:Object; 
      public var _HdrArrCol:ArrayCollection; 
      public var _DtlsArrCol:ArrayCollection; 
      static var gridheight:int=0; 
      public var _DtlsArrOrd:ArrayCollection; 
      public var _DtlsArrPrd:ArrayCollection; 
      public var items:Number; 
      public var qty:int; 
      public var Title:String = ""; 
      public var TinNo:String = ""; 
      public var Address1:String=""; 
      public var Address2:String=""; 
      public var Address3:String=""; 
      public var PrintWidth:Number=0; 
      public var TitleFontSize:Number=0; 
      public var AddressFontsize:Number=0; 
      public var OtherFontsize:Number=0; 
      public var BillNoFontsize:Number=0; 
      public var BillTitleFontsize:Number=0; 

      var myXML:XMLDocument=new XMLDocument(); 
      var GrnXML:XMLDocument=new XMLDocument(); 

      public var Pnt:COM.pro.printing.PrintPreviewControl=new COM.pro.printing.PrintPreviewControl(); 

      private function fakeData():ArrayCollection 
      { 
       var COUNT:int = 70; 
       var ar:Array = []; 
       for (var i:int=0; i<COUNT; ++i) 
       { 
        ar.push(
         { 
          'account':i+1, 
          'control':COUNT-i-1, 
          'description':'Account ' + (i+1).toString() 
         } 
        ); 
       } 
       return new ArrayCollection(ar); 
      }    
      private function ReadRep_XML() 
      { 
       //    var file:File = new File(File.applicationDirectory.nativePath + "\\Config.xml"); 
       //    var fileStream:FileStream = new FileStream(); 
       //    fileStream.open(file,FileMode.READ) 
       //    var Content:String=fileStream.readUTFBytes(fileStream.bytesAvailable) 
       //    myXML.ignoreWhite=true; 
       //    myXML.parseXML(Content); 
      } 
      private function onCreationComplete():void 
      {    
       if(_HdrArrCol.length > 0) 
       {     
        accounts = fakeData(); 

        lbl_title1.text=_HdrArrCol[0].Title6; 
        lbl_title2.text=_HdrArrCol[0].Title7; 
        //   lbl_Street.text=_HdrArrCol[0].Street; 
        //   lbl_Addres.text=_HdrArrCol[0].Address; 
        //   lbl_City.text=_HdrArrCol[0].City; 
        // lbl_title3.text=_HdrArrCol[0].City+" - "+_HdrArrCol[0].Pincode+", Ph : "+_HdrArrCol[0].PhoneNumber; 
        if(_HdrArrCol[0].TinNumber!="") 
        { 
         //  lbl_title4.text="TIN No : "+_HdrArrCol[0].TinNumber; 
        }      
       // HT_CUSNAM.text = "Name : "+_HdrArrCol[0].GuestName; 
        // Cus_Add.text = "Address : "+_HdrArrCol[0].City; 
        //  HT_DocNo.text = "Bill No:"+_HdrArrCol[0].BillNo; 
        //  HT_Billtype.text = "Bill Type : "+_HdrArrCol[0].Type; 
        //  Cus_Mob.text="Contact No : "+_HdrArrCol[0].MobileNo; 
        HT_Room.text="TableNo : "+_HdrArrCol[0].TableNo; 
        HT_DocDt.text ="Date   : "+_HdrArrCol[0].Date; 
        var timestr:String=_HdrArrCol[0].Time; 
        HT_Time.text ="Time  : "+timestr.substr(0,5); 
        //  HT_User.text ="User : "+_HdrArrCol[0].UserName; 
        //     HT_Pax.text = " Pax :"+_HdrArrCol[0].Pax; 
        //  lbl_SubTotal.text = _HdrArrCol[0].SubTotal;       
        //  lbl_ServiceTax.text=_HdrArrCol[0].ServiceTax;       
        //lbl_Rounding.text=_HdrArrCol[0].RoundingOff; 
        // lbl_totalround.text=_HdrArrCol[0].TotalRounded;       
        //  lbl_Total.text=_HdrArrCol[0].Total; 
        lbl_KOT.text="K O T No : "+_HdrArrCol[0].KotNo; 
        lbl_Waiter.text = "Waiter  : "+_HdrArrCol[0].WaiterName; 
        //lbl_Vat.text=_HdrArrCol[0].VatAmount; 
        //lbl_DiscountAmt.text=_HdrArrCol[0].DiscountAmt; 
        //lbl_total.text=_HdrArrCol[0].Gross; 
        //lbl_PackageCost.text=_HdrArrCol[0].PackageCost;       
        //lbl_ECESS.text=_HdrArrCol[0].ECESS;  
        //   lbl_Total1.text=_HdrArrCol[0].Total; 

       } 
       else 
       { 
        Alert.show("No Data Available For Print"); 
       }     
       fnPrintGridSetup(); 
       layoutDocument(); 


      }    
      private function focusOut_Round2(CtrlNm:String) 
      { 
       this[CtrlNm].text=Rod2.format(this[CtrlNm].text) 

      } 
      private function fnPrintGridSetup():void 
      { 

        //printADG.dataProvider = _DtlsArrCol; 
        var gridlen:int=_DtlsArrCol.length; 

        GridHeader.fnSetHeader("Item","Qty"); 
        for(var linecnt:int=0;linecnt<gridlen; linecnt++){ 

         var lineItem:BillCompKot= new BillCompKot(); 

         lineItem.width = this.width-10;     
         lineItem.fnSetProps(_DtlsArrCol[linecnt].ProductName, 
          _DtlsArrCol[linecnt].Quantity);      
         lineItemGrp.addElement(lineItem); 
         items=linecnt+1; 
         qty= qty+int(_DtlsArrCol[linecnt].Quantity);   
         lineItemGrp.height = lineItemGrp.height + 20; 
         var str:String=_DtlsArrCol[linecnt].ProductName; 
         /*if(str.length>15) 
         { 
          lineItemGrp.height = lineItemGrp.height+70; 
         } 
         else 
         { 
          lineItemGrp.height = lineItemGrp.height+30; 
         }*/ 
        } 

        this.height = 310+ lineItemGrp.height;    
       HT_ItemsNo.text="Items  : "+String(gridlen); 
      } 

      private function layoutDocument():void 
      { 
       //printADG.percentHeight = 100; 

       validateNow(); 

       calculatePageCount(); 
      } 

      public function get desiredWidth():Number 
      { 
       return this.width; 
      } 

      public function get desiredHeight():Number 
      { 
       //var desiredheight:Number=Number(gridheight); 
       var desiredheight:Number=this.height; 
       return desiredheight; 

      } 

      public function set parentObj(obj:Object):void 
      { 
       _parentObj = obj; 
      } 
      public function set HdrArrCol(HAC:ArrayCollection):void 
      { 
       _HdrArrCol = HAC; 
      } 
      public function set DtlsArrCol(DAC:ArrayCollection):void 
      { 
       _DtlsArrCol = DAC; 
       var gridlen:int=_DtlsArrCol.length; 
       gridheight=400+(20*gridlen); 

      } 


      [Bindable(event="validPagesChanged")] 
      public function get validNextPage():Boolean 
      { 
       // FIXME PLEASE : sometimes printADG.validNextPage returns false 
       // even though it's not on the last page. Yet, if I disable the 
       // check for printADG.validNextPage and just use my calculated 
       // page numbers, everything displays and prints correctly, despite 
       // going beyond what it considers its last page. 
       //return printADG.validNextPage /* && currentPageNumber < pageCount*/; 
       return false 
      } 

      public function displayObject():DisplayObject 
      { 
       return this; 
      }      

      public function nextPage():void 
      { 
       //    if (pageCount != currentPageNumber + 1) 
       //    { 
       //     xfooter.visible = false;  
       //    } 
       //    else 
       //    { 
       //     xfooter.visible = true;  
       //    } 

       //printADG.nextPage(); 
       currentPageNumber++; 

       /*if(currentPageNumber == 2) 
       { 
       removeHeaderFromLayout(); 
       }*/ 

       validateNow(); 
       dispatchEvent(new Event("validPagesChanged")); 

      } 

      [Bindable(event="validPagesChanged")] 
      public function get validPreviousPage():Boolean 
      { 
       /* see note for validNextPage */ 
       //return printADG.validPreviousPage /* && currentPageNumber > 1*/; 
       return false 
      } 

      public function previousPage():void 
      { 
       //    if (pageCount != currentPageNumber - 1) 
       //    { 
       //     xfooter.visible = false;  
       //    } 
       //    else 
       //    { 
       //     xfooter.visible = true;  
       //    } 

       //printADG.previousPage(); 
       currentPageNumber--; 

       if (currentPageNumber == 1) 
       { 
        includeHeaderInLayout(); 
       } 
       validateNow(); 
       dispatchEvent(new Event("validPagesChanged")); 

      } 

      public function calculatePageCount():void 
      { 
       var count:Number=1; 
       /* 
       while(printADG.validNextPage) 
       { 
       count++; 
       if(count == 2) 
       { 
       removeHeaderFromLayout(); 
       } 
       printADG.nextPage(); 
       validateNow(); 
       }*/ 
       pageCount = count; 
       moveToFirstPage(); 
      } 

      public function moveToFirstPage():void 
      { 
       currentPageNumber = 1; 
       //printADG.moveToFirstPage(); 
       includeHeaderInLayout(); 
       validateNow(); 
       dispatchEvent(new Event("validPagesChanged")); 
      } 


      private function removeHeaderFromLayout():void 
      { 
       //header.includeInLayout = false; 
       // force a re-calc 
       //printADG.percentHeight = 99; 
       //printADG.percentHeight = 100; 
      } 

      private function includeHeaderInLayout():void 
      { 
       //header.includeInLayout = true; 
       // force a re-calc 
       //printADG.percentHeight = 99; 
       //printADG.percentHeight = 100; 
      } 


     ]]> 
    </fx:Script> 
    <s:Group x="2" y="2" width="98%" height="338">  
     <s:VGroup height="333" width="100%" gap="3" y="0" x="23"> 
      <s:VGroup width="98%" height="87" id="Header" horizontalAlign="center" verticalAlign="bottom" chromeColor="#060303" contentBackgroundColor="#FCFBFB" >      

       <s:Label id="lbl_title1" x="42" y="3" width="474" height="55" fontSize="60" 
         fontWeight="bold" textAlign="center" fontFamily="Times New Roman"/> 
       <s:Label id="lbl_title2" x="97" y="44" width="363" height="20" fontSize="25" 
         fontWeight="bold" textAlign="center" fontFamily="Times New Roman"/>     
      </s:VGroup>    
      <s:Line width="90%" height="0" > 
       <s:stroke> 
        <s:SolidColorStroke color="black" weight="2" /> 
       </s:stroke> 
      </s:Line>       
      <s:VGroup width="98%" height="30" gap="1"> 
       <s:HGroup height="100%" width="100%" gap="60"> 
        <s:Label id="lbl_KOT" width="250" height="100%" fontSize="30" text="K O T No : 145263" 
          textAlign="left" verticalAlign="top" fontFamily="Times New Roman"/> 
        <s:Label id="HT_Room" width="180" verticalAlign="top" fontFamily="Times New Roman" 
          height="100%" fontSize="30" text="Table No : 14"/> 
       </s:HGroup>     
      </s:VGroup> 
      <s:VGroup width="98%" height="30" gap="1"> 
       <s:HGroup height="100%" width="100%" gap="3">  
        <s:Label id = "HT_DocDt" width="307" verticalAlign="top" fontFamily="Times New Roman" 
          height="100%" textAlign="left" fontSize="30" text="Date   : 14/02/2014"/> 
        <s:Label id = "HT_Time" width="210" verticalAlign="top" fontFamily="Times New Roman" 
          height="100%" textAlign="left" fontSize="30" text="Time  : 15:20"/> 
       </s:HGroup>     
      </s:VGroup>  
      <s:VGroup width="98%" height="30" gap="1"> 
       <s:HGroup height="100%" width="100%" gap="1">  
        <s:Label id="lbl_Waiter" width="315" height="100%" fontSize="30" fontFamily="Times New Roman" 
          textAlign="left" verticalAlign="top" text="Waiter  : fgdhfghfghfg"/> 
        <s:Label id = "HT_ItemsNo" width="178" verticalAlign="top" fontFamily="Times New Roman" 
          height="100%" textAlign="left" fontSize="30" text="Items  : 99"/> 
       </s:HGroup>     
      </s:VGroup>     
      <WrbComp:BillCompKot id="GridHeader" width="98%" height="30"/>   
      <s:Line width="90%" height="0" > 
       <s:stroke> 
        <s:SolidColorStroke color="black" weight="2" /> 
       </s:stroke> 
      </s:Line>    
      <s:VGroup width="98%" id="lineItemGrp" gap="2"> 
      </s:VGroup> 
      <s:Line width="90%" height="0" > 
       <s:stroke> 
        <s:SolidColorStroke color="black" weight="2" /> 
       </s:stroke> 
      </s:Line>  
      <s:HGroup width="98%" height="50" gap="0"> 
       <s:VGroup width="98%" height="100%" gap="0">      
        <s:HGroup height="44" width="100%" gap="80" verticalAlign="bottom" > 
         <s:Label text="" width="50%" height="25" fontFamily="Times New Roman" fontWeight="bold" verticalAlign="top" fontSize="25" x="130" y="0" textAlign="left"/> 
         <s:Label width="146" height="25" fontSize="25" fontFamily="Times New Roman" fontWeight="bold" text="CASHIER" 
           textAlign="right" verticalAlign="top"/>     
        </s:HGroup>            
       </s:VGroup> 
      </s:HGroup>    
      <s:Line width="90%" height="0" > 
       <s:stroke> 
        <s:SolidColorStroke color="black" weight="2" /> 
       </s:stroke> 
      </s:Line> 
     </s:VGroup> 
    </s:Group> 
</mx:VBox> 

Answer 1

使用system.drawing.printing dll並將所有內容轉換爲XML。完成。經過長時間的研究，問題解決感謝Shameem和Arun在我們團隊中努力解決這個問題。

我們使用的示例代碼。

XmlDocument dc = new XmlDocument(); 
      dc.LoadXml(Dtls); 
      int len = dc.SelectNodes("//GridXml").Count; 
      PrintDialog pd = new PrintDialog(); 
      pdoc = new PrintDocument(); 
      PrinterSettings ps = new PrinterSettings(); 
      Font font = new Font("Courier New", 15); 
      PaperSize psize = new PaperSize("Custom", 300, 300); 
      pd.Document = pdoc; 
      pd.Document.DefaultPageSettings.PaperSize = psize; 
      // 230 + (len * 15) KOT 
      // 410+(len*15) - Bill 
      pdoc.DefaultPageSettings.PaperSize.Height = 230 + (len * 15) + 410 + (len * 15); 
      pdoc.DefaultPageSettings.PaperSize.Width = 300; 
      pdoc.PrintPage += new PrintPageEventHandler(pdoc_PrintPage); 
      //pdoc.Print(); 
      PrintDialog printdlg = new PrintDialog(); 
      PrintPreviewDialog printPrvDlg = new PrintPreviewDialog(); 
      printPrvDlg.Document = pdoc; 
      printPrvDlg.ShowDialog(); // this shows the preview and then show the Printer Dlg below 
      printdlg.Document = pdoc; 
      if (printdlg.ShowDialog() == DialogResult.OK) 
      { 
       pdoc.Print(); 
      } 
     }