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SequenceItemRenderer.as
 package com.carnation.component.common
{
import mx.collections.IList;
import mx.controls.Label;
import mx.controls.listClasses.BaseListData;
import mx.controls.listClasses.ListBase;
public class SequenceItemRenderer extends Label
{
public function SequenceItemRenderer()
{
super();
}

// ÁíÒ»ÖÖ·½·¨»ñÈ¡dataProvider²¢µ÷ÓÃgetItemIndex·½·¨
// override public function set data(value:Object):void{
// super.data = value;
// text = (((listData.owner as ListBase).dataProvider as IList)
// .getItemIndex(data) + 1).toString();
// }
override public function set listData(value:BaseListData):void{
super.listData = value;
text = ((value.owner as ListBase).itemRendererToIndex(this) + 1).toString();
}
}
}
Test.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" creationComplete="init()">
<mx:Script>
<!--[CDATA[
import com.carnation.component.common.SequenceItemRenderer;

private var indexRenderer:Class = SequenceItemRenderer;

private function init():void{
var array:Array = [];
for(var i:int = 1; i <= 10; i++){
array.push({name:"name"+i.toString()});
}
grid.dataProvider = array;
}
]]-->
</mx:Script>
<mx:DataGrid id="grid">
<mx:columns>
<mx:DataGridColumn headerText="no" itemRenderer="{new ClassFactory(inde