Flex4中使用HTTPService与后台交互绑定到DataGrid控件

<?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"
creationComplete="feedRequest.send();">

<!--Flex中,HTTPService需要定义在<fx:Declarations>中-->
<fx:Declarations>
<mx:HTTPService
id="feedRequest"
url="http://weblogs.macromedia.com/mchotin/index.xml"
useProxy="false" />
</fx:Declarations>

<!--将下载的文件与DataGrid绑定-->
<mx:Panel title="HTTPService Example" height="75%" width="75%"
paddingTop="10" paddingBottom="10" paddingLeft="10" paddingRight="10">

<mx:DataGrid id="dgPosts" height="50%" width="75%"
dataProvider="{feedRequest.lastResult.rss.channel.item}">
<mx:columns>
<mx:DataGridColumn headerText="Posts" dataField="title"/>
<mx:DataGridColumn headerText="Date" dataField="pubDate"/>
</mx:columns>
</mx:DataGrid>

<mx:TextArea height="50%" width="75%" htmlText="{dgPosts.selectedItem.description}"/>
</mx:Panel>
</s:Application>