Flex中對表格中某列的值進行數(shù)字格式化保留兩位小數(shù)

更新時間：2014年10月21日 17:01:53 投稿：whsnow

表格中展示的比率，對比率的處理是：保留兩位小數(shù)，并向上保留。通過對某列的值進行數(shù)字格式化來實現(xiàn)保留兩位小數(shù)

1、問題背景

一般的，表格中展示的比率，對比率的處理是：保留兩位小數(shù)，并向上保留

2、實現(xiàn)實例

<?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="微軟雅黑"> 
<s:layout> 
<s:BasicLayout/> 
</s:layout> 
<fx:Script> 
<![CDATA[ 
import mx.collections.ArrayCollection; 
import mx.events.FlexEvent; 

[Bindable] 
//表格數(shù)據(jù)綁定 
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"} 
]); 

/** 
* 對表格中的比率進行格式化 
*/ 
private function formatDataGrid(item:Object,column:DataGridColumn):String 
{ 
var temp:Number = item.rate; 
var data:String = dataFormatter.format(temp); 
return data; 
} 

]]> 
</fx:Script> 
<fx:Declarations> 
<!--格式化數(shù)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="蘋果" dataField="apple"/> 
<mx:DataGridColumn headerText="比率" dataField="rate" labelFunction="formatDataGrid"/> 
</mx:columns> 
</mx:DataGrid> 

</mx:VBox> 
</s:Application>

3、實現(xiàn)結果