Flex中如何通过监听collectionChange事件检测DataGrid的数据源是否改变的例子

zjkilly

下面是完整代码：

Download: main.mxml<?xml version="1.0" encoding="utf-8"?>
<mx:Application name="DataGrid_collectionChange_test"
xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white"
initialize="init();">

<mx:Script>
<![CDATA[
import mx.controls.Alert;
import mx.events.CollectionEvent;

private function init():void {
dataGrid.addEventListener(CollectionEvent.COLLECTION_CHANGE, dataGrid_collectionChange);
}

private function btn_click(evt:MouseEvent):void {
var fontArr:Array = Font.enumerateFonts(true);
dataGrid.dataProvider = fontArr.sortOn("fontName");
}

private function dataGrid_collectionChange(evt:CollectionEvent):void {
Alert.show("The DataGrid control's data provider has changed.", evt.type);
}
]]>
</mx:Script>

<mx:ApplicationControlBar dock="true">
<mx:Button id="btn"
label="Click me to set DataGrid data provider"
click="btn_click(event);" />
</mx:ApplicationControlBar>

<mx:DataGrid id="dataGrid"
width="400" />

</mx:Application>

转载自：http://hi.baidu.com/tiankui6658/blog/item/e62dac885f23e79ea4c272eb.html