flex-----数据绑定
1.<mx:Label x="64" y="28" text="中国加油" width="207" height="92" id="msg" fontSize="{fsize.value}"/><mx:HSlider x="64" y="174" width="291" height="24" id="fsize" minimum="10" maximum="50"/>2.使用绑定变量<mx:Script><![CDATA[[Bindable]private var n:int;internal function square(num:int):int{return num*num;}]]></mx:Script><mx:Label x="50" y="53" text="结果" width="59" height="29" fontSize="12"/><mx:TextInput x="103" y="53" id="txt" text="{square(n)}"/><mx:HSlider x="90" y="148" width="353" height="24" id="s_num" minimum="1" maximum="10" snapInterval="1"change="{n=s_num.value}"/>这里使用了[Bindable]标签3. 固定标签做数据源<mx:Model id="books"><books><book> <name>Flex数据</name> <author>张三</author></book></books></mx:Model><mx:Binding source="books.book.name" destination="text_name.text"/><mx:Binding source="books.book.author" destination="text_author.text"/><mx:Panel x="70" y="43" width="375" height="201" layout="absolute" title="图书信息"><mx:Label x="32" y="33" text="书名" width="76" fontSize="12"/><mx:Label x="32" y="61" text="作者" fontSize="12"/><mx:TextInput x="97" y="33" id="text_name"/><mx:TextInput x="97" y="61" id="text_author"/></mx:Panel>4。通过一个类，绑定类package com.zhe{[Bindable] //这个标签对所有public变量都有绑定public class BindClass{private var n:int;public function BindClass(){} // [Bindable] public function get N():int{ return n; } public function set N(x:int):void{ n = x; }}}<mx:Script><![CDATA[import com.zhe.BindClass;internal var br:BindClass = new BindClass();internal function square(num:int):int{return num*num;}]]></mx:Script><mx:Label x="50" y="53" text="结果" width="59" height="29" fontSize="12"/><mx:TextInput x="103" y="53" id="txt" text="{square(br.N)}"/><mx:HSlider x="90" y="148" width="353" height="24" id="s_num" minimum="1" maximum="10" snapInterval="1"change="{br.N=s_num.value}"/>6。 小例子<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="init()"><mx:Script><![CDATA[import com.zhe.Person;[Bindable]internal var currentItem:Person; //这是一个传递值的对象internal function init():void{var p1:Person = new Person();p1.name = "老张";p1.age = 65;p1.address="北京";p1.job="公务员";var item1:listItem=new listItem();item1.height=20;item1.p = p1;item1.addEventListener("selectItem",selectHandler);list_yg.addChild(item1);item1.y=0;var p2:Person = new Person();p2.name="小李";p2.age=10;p2.address="上海";p2.job="程序员";var item2:listItem = new listItem();item2.p=p2;item2.addEventListener("selectItem",selectHandler);list_yg.addChild(item2);item2.y=item1.height*1;var p3:Person = new Person();p3.name="大刘";p3.age=20;p3.address="南京";p3.job="程序员";var item3:listItem = new listItem();item3.p=p3;item3.addEventListener("selectItem",selectHandler);list_yg.addChild(item3);item3.y=item1.height*2;}internal function selectHandler(evt:Event):void{if(evt.target == evt.currentTarget)currentItem = listItem(evt.target).p;//listItem(evt.target)是强制转换}]]></mx:Script><mx:Panel x="281" y="98" width="303" height="263" layout="absolute" title="员工信息" fontSize="12"><mx:Label x="24" y="33" text="姓名:" width="49"/><mx:Label x="24" y="76" text="年龄"/><mx:Label x="28" y="128" text="住址"/><mx:Label x="28" y="166" text="职业"/><mx:TextInput x="81" y="33" id="txt_name" text="{currentItem.name}"/><mx:TextInput x="81" y="128" id="txt_addr" text="{currentItem.address}"/><mx:TextInput x="81" y="166" id="txt_job" text="{currentItem.job}"/><mx:TextInput x="81" y="76" id="txt_age" text="{currentItem.age}"/></mx:Panel><mx:Panel x="40" y="83" width="201" height="278" layout="absolute" title="员工列表" fontSize="12" id="list_yg"></mx:Panel></mx:Application><?xml version="1.0" encoding="utf-8"?><mx:Label xmlns:mx="http://www.adobe.com/2006/mxml" click="onClick(event)" text="{p.name}"><mx:Script><![CDATA[//事件，表单，数据元素都集成在一起了，通过evt.target可以拿到表单，通过表单.p可以拿到Personimport com.zhe.Person;public var p:Person; //一个item就是一个拥有员工信息的对象，其实这是使得标签和类绑定了internal function onClick(evt:MouseEvent):void{dispatchEvent(new Event("selectItem"));}]]></mx:Script></mx:Label>package com.zhe{public class Person{public var name:String;public var age:int;public var address:String;public var job:String;public function Person(){}}}