基于ListBase的flex组件从 data provider 获取数据。dataProvider提供了复杂数据类型，如Array，ArrayCollection，XML,XMLCollection等。dataProvider可以用mxml及AS两种方式定义。下面例子中的四个List展现同样的内容：
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="horizontal">
<mx:Script>
<![CDATA[
[Bindable]
private var myArray:Array = ["a","b","c"];
[Bindable]
private var xml:XML =
<nodes>
<node label="a"/>
<node label="b"/>
<node label="c"/>
</nodes>;
]]>
</mx:Script>
<mx:List dataProvider="{myArray}" width="50" height="200"/>
<mx:List dataProvider="{xml.children()}" labelField="@label" width="50" height="200"/>
<mx:List width="50" height="200">
<mx:dataProvider>
<mx:Object label="a"/>
<mx:Object label="b"/>
<mx:Object label="c"/>
</mx:dataProvider>
</mx:List>
<mx:List width="50" height="200" labelField="@label">
<mx:dataProvider>
<mx:XMLList>
<node label="a"/>
<node label="b"/>
<node label="c"/>
</mx:XMLList>
</mx:dataProvider>
</mx:List>
</mx:Application>
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="horizontal" creationComplete="init()">
<mx:Script>
<![CDATA[
import mx.collections.SortField;
import mx.collections.Sort;
import mx.collections.ArrayCollection;
[Bindable]
//private var myArray:Array = ["c","b","a"];
private var myArray:ArrayCollection = new ArrayCollection( ["c","b","a"]);
private function sort(){
var sort:Sort = new Sort();
sort.fields = [new SortField()];
myArray.sort = sort;
myArray.refresh();
myArray.sort.fields = new Array();
}
private function filter(item:Object):Boolean{
if("a"==item)
return false;
else
return true;
}
]]>
</mx:Script>
<mx:List dataProvider="{myArray}" width="50" height="200"/>
<!--<mx:Button label="add" click="myArray.push(myArray.length)"/>-->
<mx:Button label="add" click="myArray.addItem(myArray.length)"/>
<mx:Button label="sort" click="sort()"/>
<mx:Button label="filter" click="myArray.filterFunction=filter;myArray.refresh();"/>
</mx:Application>
<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="horizontal"> <mx:Script> <![CDATA[ [Bindable] private var myArray:Array = ["a","b","c"]; [Bindable] private var xml:XML = <nodes> <node label="a"/> <node label="b"/> <node label="c"/> </nodes>; ]]> </mx:Script> <mx:List dataProvider="{myArray}" width="50" height="200"/> <mx:List dataProvider="{xml.children()}" labelField="@label" width="50" height="200"/> <mx:List width="50" height="200"> <mx:dataProvider> <mx:Object label="a"/> <mx:Object label="b"/> <mx:Object label="c"/> </mx:dataProvider> </mx:List> <mx:List width="50" height="200" labelField="@label"> <mx:dataProvider> <mx:XMLList> <node label="a"/> <node label="b"/> <node label="c"/> </mx:XMLList> </mx:dataProvider> </mx:List> </mx:Application>如果使用Collection，可以保证数据同步并提供简单数据操作,比如排序和过滤。下面的例子演示了同步，排序和过滤：
<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="horizontal" creationComplete="init()"> <mx:Script> <![CDATA[ import mx.collections.SortField; import mx.collections.Sort; import mx.collections.ArrayCollection; [Bindable] //private var myArray:Array = ["c","b","a"]; private var myArray:ArrayCollection = new ArrayCollection( ["c","b","a"]); private function sort(){ var sort:Sort = new Sort(); sort.fields = [new SortField()]; myArray.sort = sort; myArray.refresh(); myArray.sort.fields = new Array(); } private function filter(item:Object):Boolean{ if("a"==item) return false; else return true; } ]]> </mx:Script> <mx:List dataProvider="{myArray}" width="50" height="200"/> <!--<mx:Button label="add" click="myArray.push(myArray.length)"/>--> <mx:Button label="add" click="myArray.addItem(myArray.length)"/> <mx:Button label="sort" click="sort()"/> <mx:Button label="filter" click="myArray.filterFunction=filter;myArray.refresh();"/></mx:Application>