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” 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 paddingBottom=”10″ paddingLeft=”10″ paddingRight=”20″
paddingTop=”10″ horizontalAlign=”center”>
<mx:DataGrid 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