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 id=\”dataFormatter\” precision=\”2\” rounding=\”up\”/>
</fx:Declarations>
<mx:VBox width=\”100%\” height=\”100%\” paddingBottom=\”10\” paddingLeft=\”10\” paddingRight=\”20\”
paddingTop=\”10\” horizontalAlign=\”center\”>
<mx:DataGrid id=\”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
