comboboxexample.mxml

《Flex第一步:基于ActionScript 3.0的Flex 2应用开发》采用概念讲解与实例结合的方式

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="initUI()">
	<mx:Script>
		<![CDATA[
			import mx.events.DropdownEvent;			
			
			internal function initUI():void{
				var info:Array = new Array();
				info.push({label:"Book 1" ,data:"1"});
				info.push({label:"Book 2" ,data:"2"});
				info.push({label:"Book 3" ,data:"3"});
				bookList.dataProvider = info;
				
				bookList.addEventListener(DropdownEvent.CLOSE,chooseHandler)
			}
			internal function chooseHandler(evt:DropdownEvent):void{
				var item:Object = bookList.selectedItem;				
				tip_txt.text = "Select:Label:"+item.label+":data:"+item.data;
			}
		]]>
	</mx:Script>
	<mx:ComboBox id="bookList" x="30" y="86" width="160"></mx:ComboBox>
	<mx:TextArea id="tip_txt" x="30" y="129" height="182" width="178"/>	
	
</mx:Application>