在应用程序中使用数据库，Adobe提供了若干组件，如Web Service，HTTP Service，Remote Object Service这些组件都称为远程调用（RPC）组件。
使用LinkButton打开一个url：
<mx:LinkButton x="30" y="250" label="Select an item and click here for full post"
click="navigateToURL(new URLRequest(dgTopPosts.selectedItem.postLink));" />
Demo：显示weblog网页中点击统计信息，并通过LinkButton打开选中项。
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
creationComplete="wsgBlogAggr.getMostPopularPosts.send()">
<mx:WebService id="wsgBlogAggr"
wsdl="http://weblogs.macromedia.com/mxna/webservices/mxna2.cfc?wsdl"
useProxy="false">
<mx:operation name="getMostPopularPosts">
<mx:request>
<daysBack>30</daysBack>
<limit>{cbxNumberPosts.value}</limit>
</mx:request>
</mx:operation>
</mx:WebService>
<mx:ComboBox x="10" y="25" id="cbxNumberPosts"
change="wsgBlogAggr.getMostPopularPosts.send()">
<mx:Object label="Top 5" data="5"/>
<mx:Object label="Top 10" data="10"/>
<mx:Object label="Top 15" data="15"/>
</mx:ComboBox>
<mx:DataGrid x="10" y="67" id="dgTopPosts" width="400"
dataProvider="{wsgBlogAggr.getMostPopularPosts.lastResult}">
<mx:columns>
<mx:DataGridColumn headerText="Top Posts" dataField="postTitle"/>
<mx:DataGridColumn headerText="Clicks" dataField="clicks" width="75"/>
</mx:columns>
</mx:DataGrid>
<mx:LinkButton x="10" y="231" label="Select an item and click here for full post"
click="navigateToURL(new URLRequest(dgTopPosts.selectedItem.postLink));"/>
</mx:Panel>
</mx:Application>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
creationComplete="wsgBlogAggr.getMostPopularPosts.send()">
<mx:WebService id="wsgBlogAggr"
wsdl="http://weblogs.macromedia.com/mxna/webservices/mxna2.cfc?wsdl"
useProxy="false">
<mx:operation name="getMostPopularPosts">
<mx:request>
<daysBack>30</daysBack>
<limit>{cbxNumberPosts.value}</limit>
</mx:request>
</mx:operation>
</mx:WebService>
<mx:Panel x="10" y="10" width="475" height="400" layout="absolute" title="Most Popular Posts">
<mx:ComboBox x="10" y="25" id="cbxNumberPosts"
change="wsgBlogAggr.getMostPopularPosts.send()">
<mx:Object label="Top 5" data="5"/>
<mx:Object label="Top 10" data="10"/>
<mx:Object label="Top 15" data="15"/>
</mx:ComboBox>
<mx:DataGrid x="10" y="67" id="dgTopPosts" width="400"
dataProvider="{wsgBlogAggr.getMostPopularPosts.lastResult}">
<mx:columns>
<mx:DataGridColumn headerText="Top Posts" dataField="postTitle"/>
<mx:DataGridColumn headerText="Clicks" dataField="clicks" width="75"/>
</mx:columns>
</mx:DataGrid>
<mx:LinkButton x="10" y="231" label="Select an item and click here for full post"
click="navigateToURL(new URLRequest(dgTopPosts.selectedItem.postLink));"/>
</mx:Panel>
</mx:Application>
Result：
