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    Flex中对表格某列的值进行数字格式化并求百分比添加%

    作者:admin 时间:2021-08-17 19:02

    1、问题背景

    一般的,需要对表格中某列的数值进行格式化,对该数值乘以100,并保留两位小数,添加“%”

    2、实现实例

    <?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" 
    width="100%" height="100%" fontSize="12" 
    fontFamily="微软雅黑"> 
    <s:layout> 
    <s:BasicLayout/> 
    </s:layout> 
    <fx:Script> 
    <![CDATA[ 
    import mx.collections.ArrayCollection; 
    import mx.events.FlexEvent; 
    
    [Bindable] 
    //表格数据绑定 
    private var gridArray:ArrayCollection = new ArrayCollection([ 
    {week:"星期一",apple:"3676",rate:"0.7868"}, 
    {week:"星期二",apple:"4534",rate:"0.65454"}, 
    {week:"星期三",apple:"6758",rate:"0.876454"}, 
    {week:"星期四",apple:"9808",rate:"0.34224"}, 
    {week:"星期五",apple:"6567",rate:"0.9876523"}, 
    {week:"星期六",apple:"9000",rate:"0.566777"}, 
    {week:"星期日",apple:"4533",rate:"0.988787"} 
    ]); 
    
    /** 
    * 对表格中的比率进行格式化 
    */ 
    private function formatDataGrid(item:Object,column:DataGridColumn):String 
    { 
    var tempData:Number = item.rate*100; 
    var data:String = dataFormatter.format(tempData); 
    return data+"%"; 
    } 
    
    ]]> 
    </fx:Script> 
    <fx:Declarations> 
    <!--格式化数字--> 
    <mx:NumberFormatter  precision="2" rounding="up"/> 
    </fx:Declarations> 
    
    <mx:VBox width="100%" height="100%" paddingBottom="10" paddingLeft="10" paddingRight="20" 
    paddingTop="10" horizontalAlign="center"> 
    <mx:DataGrid  width="100%" height="90%" dataProvider="{gridArray}" textAlign="center"> 
    <mx:columns> 
    <mx:DataGridColumn headerText="星期" dataField="week"/> 
    <mx:DataGridColumn headerText="苹果" dataField="apple"/> 
    <mx:DataGridColumn headerText="比率" dataField="rate" labelFunction="formatDataGrid"/> 
    </mx:columns> 
    </mx:DataGrid> 
    
    </mx:VBox> 
    </s:Application>

    (1)将小数乘以100

    var tempData:Number = item.rate*100;

    (2)对数值格式化,保留两位小数

    var data:String = dataFormatter.format(tempData);

    (3)添加百分号

    return data+"%";

    3、实现结果

    jsjbwy
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