flex AdvancedDataGrid显示列表和分组显示列表

<?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" minWidth="955" minHeight="600"><fx:Style>@namespace s "library://ns.adobe.com/flex/spark";@namespace mx "library://ns.adobe.com/flex/mx";mx|AdvancedDataGrid {font-size:18px;}</fx:Style><s:layout><s:BasicLayout/></s:layout><fx:Declarations><fx:Model id="prd"><datas><prod><cgy>家电</cgy><name>冰箱</name><price>2330</price><desc>很好！</desc></prod><prod><cgy>家电</cgy><name>彩电</name><price>6533</price><desc>很好！很好！</desc></prod><prod><cgy>通讯</cgy><name>小灵通</name><price>4321</price><desc>不错！</desc></prod><prod><cgy>通讯</cgy><name>手机</name><price>311</price><desc>打不通！</desc></prod></datas></fx:Model></fx:Declarations><fx:Script><![CDATA[import mx.controls.Alert;import mx.events.ItemClickEvent;import mx.events.ListEvent;private function doDoubleClick(event:ListEvent):void {Alert.show(this.adg.selectedItem.name);}]]></fx:Script><mx:AdvancedDataGrid id="adg" width="600" height="300"  dataProvider="{prd.prod}" doubleClickEnabled="true" itemDoubleClick="doDoubleClick(event);" x="0" y="0"><mx:columns><mx:AdvancedDataGridColumn headerText="类型" dataField="cgy"/><mx:AdvancedDataGridColumn headerText="名称" dataField="name"/><mx:AdvancedDataGridColumn headerText="价格" dataField="price"/><mx:AdvancedDataGridColumn headerText="描述" dataField="desc"/></mx:columns></mx:AdvancedDataGrid><mx:AdvancedDataGrid id="adg2" creationComplete="myGroup.refresh()" width="600" height="300" x="650"><mx:dataProvider><mx:GroupingCollection id="myGroup" source="{prd.prod}"><mx:Grouping><mx:GroupingField name="cgy"><mx:summaries><mx:SummaryRow summaryPlacement="last" ><mx:fields><mx:SummaryField dataField="name" operation="COUNT"  label="col_count"/><mx:SummaryField dataField="price" operation="SUM"  label="col_price"/></mx:fields></mx:SummaryRow></mx:summaries></mx:GroupingField></mx:Grouping></mx:GroupingCollection></mx:dataProvider><mx:columns><mx:AdvancedDataGridColumn headerText="类型" dataField="cgy"/><mx:AdvancedDataGridColumn headerText="名称" dataField="name"/><mx:AdvancedDataGridColumn headerText="价格" dataField="price"/><mx:AdvancedDataGridColumn headerText="描述" dataField="desc"/><mx:AdvancedDataGridColumn headerText="数量" dataField="col_count"/><mx:AdvancedDataGridColumn headerText="总价" dataField="col_price"/></mx:columns></mx:AdvancedDataGrid></s:Application>