Question

我需要将flex 4.5中的饼图和数据网格导出为Microsoft Excel格式。我能够使用as3xls导出数据网格。但它不允许导出任何图表，甚至不能将图像添加到Excel文件中。任何人都可以推荐我这样做的方法吗？

Answer 1

据我所知，无法通过现有库将图表导出到Excel。

我想建议你一个特定的方法来做到这一点。我们都知道当前的Office文件存储为XML结构的集合。这些文件打包为zip-archive。如果您看一下这些东西，您可以看到可以操纵这些文件中的某些行来获取任何表格，任何图表，您想要的任何图片。

要在Flex中执行此操作，您需要基本的XML结构和一些库才能压缩结果。

我使用Nochump组件来访问zip函数。

Here您可以阅读有关Excel文件结构的信息。

以下是一些图片，显示了使用此方法可以获得的结果。

Datagrid and chart in Flex application

Resulting Excel-table with a chart

关于应用程序，您应该知道必须修补哪些文件：

sheet1.xml包含有关工作表单元格的信息
sharedStrings.xml是文件
chart1.xml是您图表的说明 - 您只应更改您的数据范围。

为了使它工作，我创建了一个XML结构，其中包含Excel文件树的描述。我放入项目文件夹的这个文件树的实际XML文件。然后我将所有文件读取到ArrayCollection并操纵其中三个文件的数据。

毕竟我将它们打包成zip-archive并让用户将其保存到PC中。

以下是源代码：

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
           xmlns:s="library://ns.adobe.com/flex/spark" 
           xmlns:mx="library://ns.adobe.com/flex/mx" 
           minWidth="955" minHeight="600" 
           creationComplete="onCreationComplete(event)">
<fx:Declarations>
    <fx:XML id="fileTree" xmlns="">
        <root id=''>
            <folder id='_rels'>
                <file id='.rels'/>
            </folder>
            <folder id='docProps'>
                <file id='app.xml'/>
                <file id='core.xml'/>
            </folder>
            <folder id='xl'>
                <folder id='_rels'>
                    <file id='workbook.xml.rels'/>
                </folder>
                <folder id='charts'>
                    <file id='chart1.xml'/>
                </folder>
                <folder id='drawings'>
                    <folder id='_rels'>
                        <file id='drawing1.xml.rels'/>
                    </folder>
                    <file id='drawing1.xml'/>
                </folder>
                <folder id='theme'>
                    <file id='theme1.xml'/>
                </folder>
                <folder id='worksheets'>
                    <folder id='_rels'>
                        <file id='sheet1.xml.rels'/>
                    </folder>
                    <file id='sheet1.xml'/>
                </folder>
                <file id='sharedStrings.xml'/>
                <file id='styles.xml'/>
                <file id='workbook.xml'/>
            </folder>
            <file id='[Content_Types].xml'/>
        </root>
    </fx:XML>
</fx:Declarations>

<fx:Script>
    <![CDATA[
        import flash.utils.ByteArray;
        import mx.collections.ArrayCollection;
        import mx.collections.XMLListCollection;
        import mx.controls.Alert;
        import mx.controls.dataGridClasses.DataGridColumn;
        import mx.events.FlexEvent;
        import mx.rpc.xml.SimpleXMLDecoder;
        import nochump.util.zip.*;

        private const CELL_LETTERS:String = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

        private var xmlLoader:URLLoader = new URLLoader();

        private var loaderItemId:int = 0;
        private var rootPath:String = "com/excelchart/xmlsource/";

        private var xlsxFiles:ArrayCollection = new ArrayCollection();

        [Bindable]private var dp:ArrayCollection = new ArrayCollection([
            {party:"SPD",               y2009:23,   y2005:34.2  },
            {party:"CDU",               y2009:27.3, y2005:27.8  },
            {party:"FDP",               y2009:14.6, y2005:9.8   },
            {party:"The Left Party",    y2009:11.9, y2005:8.7   },
            {party:"A90/The Greens",    y2009:10.7, y2005:8.1   },
            {party:"CSU",               y2009:6.5,  y2005:7.4   },
            {party:"Others",            y2009:6,    y2005:3.9   }]);

        protected function onCreationComplete(event:FlexEvent):void
        {
            init();
            traverseXMLList(fileTree, 0, "");
            processNextNode();
        }

        private function traverseXMLList(xml:XML, depth:int, parentPath:String):void
        {
            var path:String = (parentPath == "") ? xml.@id : parentPath + "/" + xml.@id;
            var nodeType:String = xml.name().localName;

            xlsxFiles.addItem({name:xml.@id.toString(), type:nodeType, path:path});

            for each (var item:XML in xml.children())
                traverseXMLList(item, depth + 1, path);
        }

        private function packZip():void
        {
            var zipEntry:ZipEntry;
            var fileName:String;
            var fileData:ByteArray = new ByteArray();
            var zipOut:ZipOutput = new ZipOutput();

            for (var i:int = 0; i < xlsxFiles.length; i++)
            {
                var obj:Object = xlsxFiles.getItemAt(i);

                if (obj.type == "file")
                {
                    fileName = obj.path;
                    zipEntry = new ZipEntry(fileName); 
                    fileData.clear();
                    fileData.writeUTFBytes(obj.content);

                    zipOut.putNextEntry(zipEntry);
                    zipOut.write(fileData);
                    zipOut.closeEntry();
                }
            }

            // end the zip
            zipOut.finish();

            var file:FileReference = new FileReference();
            file.save(zipOut.byteArray, "chart.xlsx");
        }

        private function init():void
        {
            xmlLoader.addEventListener(Event.COMPLETE, onXmlLoaderComplete);
            xmlLoader.addEventListener(IOErrorEvent.IO_ERROR, onXmlLoaderIOError);
        }

        private function loadXML():void
        {
            xmlLoader.load(new URLRequest(rootPath + xlsxFiles.getItemAt(loaderItemId).path)); 
        }

        private function onXmlLoaderComplete(event:Event):void
        {
            xlsxFiles.getItemAt(loaderItemId).content = (event.currentTarget as URLLoader).data;
            processNextNode();
        }

        private function processNextNode():void
        {
            if (xlsxFiles.length > loaderItemId + 1)
            {
                loaderItemId++;

                if (xlsxFiles.getItemAt(loaderItemId).type == "file")
                    loadXML();
                else
                    processNextNode();
            }
            else
                this.btnMakeZip.enabled = true;
        }

        private function onXmlLoaderIOError(evt:IOErrorEvent):void
        {
            Alert.show("error!");
        }

        protected function onMakeZipClick(event:MouseEvent):void
        {
            parseDataGrid();
            packZip();
        }

        protected function isString(input:String):Boolean
        {
            return isNaN(Number(input));
        }

        protected function parseDataGrid():void
        {
            function getStringId(str:String):int
            {
                var result:int = -1;

                for (var i:int = 0; i < stringDictionary.length; i++)
                    if (stringDictionary.getItemAt(i) == str)
                    {
                        result = i;
                        break;
                    }

                if (result == -1)
                {
                    stringDictionary.addItem(str);
                    result = stringDictionary.length - 1;
                }
                return result;
            }

            //find sheet1 xml
            var sheet1XML:XML;
            var xlsxFilesItemId:int;

            for (i = 0; i < xlsxFiles.length; i++)
                if (xlsxFiles.getItemAt(i).name == "sheet1.xml")
                {
                    sheet1XML = new XML(xlsxFiles.getItemAt(i).content);
                    xlsxFilesItemId = i;
                    break;
                }

            //define the size of the DG
            var dgHeight:int = myGrid.dataProvider.length;
            var dgWidth:int = myGrid.columns.length;

            //namespaces for elements
            var mainNS:Namespace = new Namespace("http://schemas.openxmlformats.org/spreadsheetml/2006/main");
            var x14acNS:Namespace = new Namespace("x14ac", "http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac");

            default xml namespace = mainNS;
            sheet1XML.addNamespace(x14acNS);

            sheet1XML.dimension.@ref = "A1:" + CELL_LETTERS.charAt(dgWidth) + (dgHeight + 1).toString();

            //delete nodes from sheet1XML.sheetData
            var sheetDataRowCollection:XMLListCollection = new XMLListCollection(sheet1XML.sheetData.row);
            sheetDataRowCollection.removeAll();

            //create a String dictionary
            var stringDictionary:ArrayCollection = new ArrayCollection();
            var stringId:int = 0;

            var cellNode:XML, rowNode:XML, value:String, cellAddress:String;
            var i:int, j:int;

            //add head information
            rowNode = new XML();
            rowNode.addNamespace(mainNS);
            rowNode.addNamespace(x14acNS);
            rowNode = <row r="1" spans="1:3"/>;
            rowNode.@x14acNS::dyDescent = "0.25";

            for (j = 0; j < dgWidth; j++)
            {
                value = (((myGrid.columns as ArrayList).getItemAt(j) as GridColumn).headerText).toString();
                cellAddress = CELL_LETTERS.charAt(j) + "1";

                cellNode = new XML();
                cellNode = <c r={cellAddress} t="s"><v>{getStringId(value).toString()}</v></c>;

                rowNode = rowNode.appendChild(cellNode);
            }
            sheetDataRowCollection.addItem(rowNode);

            //traverse through DG
            for (i = 0; i < dgHeight; i++)
            {
                rowNode = new XML();
                rowNode.addNamespace(mainNS);
                rowNode.addNamespace(x14acNS);
                rowNode = <row r={i + 2} spans="1:3"/>;
                rowNode.@x14acNS::dyDescent = "0.25";

                for (j = 0; j < dgWidth; j++)
                {
                    value = (myGrid.dataProvider.getItemAt(i)[((myGrid.columns as ArrayList).getItemAt(j) as GridColumn).dataField]).toString();
                    cellAddress = CELL_LETTERS.charAt(j) + (i+2).toString();

                    cellNode = new XML();

                    if (isString(value))
                        cellNode = <c r={cellAddress} t="s"><v>{getStringId(value).toString()}</v></c>;
                    else
                        cellNode = <c r={cellAddress}><v>{value}</v></c>;

                    rowNode = rowNode.appendChild(cellNode);
                }
                sheetDataRowCollection.addItem(rowNode);
            }

            //save sheet1 to xlsxFiles
            xlsxFiles.getItemAt(xlsxFilesItemId).content = sheet1XML;

            //sharedStrings
            var sharedStringsXML:XML;

            for (i = 0; i < xlsxFiles.length; i++)
                if (xlsxFiles.getItemAt(i).name == "sharedStrings.xml")
                {
                    sharedStringsXML = new XML(xlsxFiles.getItemAt(i).content);
                    xlsxFilesItemId = i;
                    break;
                }

            //delete nodes from sharedStrings.xml
            var sharedStringsCollection:XMLListCollection = new XMLListCollection(sharedStringsXML.si);
            sharedStringsCollection.removeAll();

            //fill the sharedStrings XML
            sharedStringsXML.@count = stringDictionary.length;
            sharedStringsXML.@uniqueCount = stringDictionary.length;

            //var siNode:XML;
            for each (var str:String in stringDictionary)
                sharedStringsXML.appendChild(<si><t>{str}</t></si>);

            //save sharedStrings to xlsxFiles
            xlsxFiles.getItemAt(xlsxFilesItemId).content = sharedStringsXML;

            //chart1
            var chart1XML:XML;

            for (i = 0; i < xlsxFiles.length; i++)
                if (xlsxFiles.getItemAt(i).name == "chart1.xml")
                {
                    chart1XML = new XML(xlsxFiles.getItemAt(i).content);
                    xlsxFilesItemId = i;
                    break;
                }

            var catLetter:String = CELL_LETTERS.charAt(cbCategories.selectedIndex);
            var catAddress:String = "Tabelle1!$" + catLetter + "$2:$" + catLetter + "$" + (dgHeight + 1).toString(); 

            var valLetter:String = CELL_LETTERS.charAt(cbValues.selectedIndex);
            var valAddress:String = "Tabelle1!$" + valLetter + "$2:$" + valLetter + "$" + (dgHeight + 1).toString();

            default xml namespace = new Namespace("c", "http://schemas.openxmlformats.org/drawingml/2006/chart");

            chart1XML.chart.plotArea.pieChart.ser.cat.strRef.f = catAddress;
            chart1XML.chart.plotArea.pieChart.ser.val.numRef.f = valAddress;

            xlsxFiles.getItemAt(xlsxFilesItemId).content = chart1XML;

            //switch back to the default namespace
            default xml namespace = new Namespace("");
        }

        private function onBtnRefresh():void
        {
            this.mySeries.nameField = cbCategories.selectedItem.dataField;
            this.mySeries.field = cbValues.selectedItem.dataField;
        }
    ]]>
</fx:Script>

<s:HGroup x="100" y="50">
    <s:VGroup>
        <s:DataGrid id="myGrid" width="360" dataProvider="{dp}">   
            <s:columns>
                <s:ArrayList>
                    <s:GridColumn dataField="party" headerText="Party"/>
                    <s:GridColumn dataField="y2005" headerText="2005" width="90"/>
                    <s:GridColumn dataField="y2009" headerText="2009" width="90"/>
                </s:ArrayList>
            </s:columns>       
        </s:DataGrid> 

        <s:HGroup verticalAlign="bottom">
            <s:Label text="Categories:" width="70"/>
            <s:ComboBox id="cbCategories" dataProvider="{myGrid.columns}" labelField="headerText" selectedIndex="0"/>
        </s:HGroup>

        <s:HGroup verticalAlign="bottom">
            <s:Label text="Values:" width="70"/>
            <s:ComboBox id="cbValues" dataProvider="{myGrid.columns}" labelField="headerText" selectedIndex="1"/>
        </s:HGroup>

        <s:HGroup>
            <s:Button id="btnRefresh" label="Bild Chart" click="onBtnRefresh()"/>
            <s:Button id="btnMakeZip" label="Export" enabled="false" click="onMakeZipClick(event)"/>
        </s:HGroup>
    </s:VGroup>

    <mx:PieChart id="myChart" width="281" height="277" dataProvider="{dp}" showDataTips="true">
        <mx:series>
            <mx:PieSeries id="mySeries" field="y2005" nameField="party" labelPosition="inside" explodeRadius=".12" />
        </mx:series>
    </mx:PieChart>
    <mx:Legend dataProvider="{myChart}"/>

</s:HGroup>
</s:Application>

我希望它可以帮到你。感谢有趣的问题！

将flex图表和datagrid导出为excel

1 个答案:

将flex图表和datagrid导出为ex​​cel

1 个答案:

将flex图表和datagrid导出为excel