我想在DataGrid中的一列格式化一些数字。我得到一个错误在我的简单测试程序，当我运行它下面。所有我见过的例子都列数据是字符串。有没有办法用数字做呢？如何修改低于code格式化检查值？

 ＆LT; XML版本=1.0编码=UTF-8＆GT？;
＆LT; MX：应用
    的xmlns：FX =htt​​p://ns.adobe.com/mxml/2009
    XMLNS：S =库：//ns.adobe.com/flex/spark
    的xmlns：MX =库：//ns.adobe.com/flex/mx＆GT;

＆LT; FX：脚本＆GT;
    ＆LT;！[CDATA [
        [可绑定]
        公共变种检查：阵列=新阵列（1000000.2222，0，1000）;

        私有函数myLabelFunction（项目：阵列，列：一个DataGridColumn）：字符串{
                VAR结果：字符串;
                结果= myFormatter.format（项目）;
                返回结果;
        }
    ]]≥
＆LT; / FX：脚本＆GT;

＆LT; FX：声明＆GT;
    ＆所述氏：的NumberFormatter的id =myFormatter
                       的fractionalDigits =2
                       decimalSeparator =。
                       使用groupingSeparator =，
                       useGrouping =真
                       的NegativeNumberFormat =0
                       /＆GT;
＆LT; / FX：声明＆GT;

＆LT; MX：DataGrid的ID =DG1的dataProvider ={}检查＆GT;

    ＆LT; MX：列＆GT;
        ＆LT; MX：一个DataGridColumn的dataField =检查HEADERTEXT =检查
                           的labelFunction =myLabelFunction/＆GT;
    ＆LT; / MX：列＆GT;

＆LT; / MX：数据网格＆GT;

＆LT; / MX：用途＆gt;
 

解决方案

更改过滤函数签名（项目应对象）

私有函数myLabelFunction（项目：对象，列：一个DataGridColumn）：字符串

I'm trying to format some numbers in a column of a DataGrid. I'm getting an error in my simplified test program below when I run it. All the examples I've seen so far have column data that are strings. Is there a way to do it using numbers? How to modify the code below to format the checking values?

<?xml version="1.0" encoding="utf-8"?>
<mx: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">

<fx:Script>
    <![CDATA[       
        [Bindable]
        public var checking:Array = new Array(1000000.2222, 0, 1000);

        private function myLabelFunction(item:Array, column:DataGridColumn):String {    
                var result:String;
                result = myFormatter.format(item);
                return result;
        }
    ]]>
</fx:Script>

<fx:Declarations>
    <s:NumberFormatter id="myFormatter"
                       fractionalDigits="2" 
                       decimalSeparator="."
                       groupingSeparator=","
                       useGrouping="true"
                       negativeNumberFormat="0"
                       />
</fx:Declarations>

<mx:DataGrid id="dg1" dataProvider="{checking}" >

    <mx:columns>
        <mx:DataGridColumn dataField="checking" headerText="Checking" 
                           labelFunction="myLabelFunction" />
    </mx:columns>

</mx:DataGrid>

</mx:Application>

Change filter function signature (item should be Object)

private function myLabelFunction(item:Object, column:DataGridColumn):String