<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical">
<mx:XML source="t.xml" id="stockData" />
<mx:Panel title="Stock Data" width="100%" height="100%" layout="vertical"
paddingBottom="10" paddingLeft="10" paddingRight="10" paddingTop="10">

<mx:HBox><mx:Label text="Start Day" />
<mx:HSlider minimum="0" maximum="30" id="dayslider" snapInterval="1" />
</mx:HBox><mx:DataGrid dataProvider="{stockData..day.(num >= daySlider.value )}" width="100%" height="100%">
<mx:columns>
<mx:DataGridColumn dataField="num" headerText="day" />
<mx:DataGridColumn dataField = "compa" headerText="Company A" />
<mx:DataGridColumn dataField = "compb" headerText="Company B" />
</mx:columns>
</mx:DataGrid>
</mx:Panel>
</mx:Application>

为什么没效果~效果应该是下图所示

哪位大侠知道的给帮忙看下吧~