flex tree 绑定数据

1:xmlist 绑定

<?xml version="1.0" encoding="utf-8"?>
<!-- Tree control example. -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">

    <mx:Script>
        <![CDATA[

            [Bindable]
            public var selectedNode:XML;

            // Event handler for the Tree control change event.
            public function treeChanged(event:Event):void {
                selectedNode=Tree(event.target).selectedItem as XML;
            }
        ]]>
    </mx:Script>

    <mx:XMLList id="treeData">
        <node label="Mail Box">
            <node label="Inbox">
                <node label="Marketing"/>
                <node label="Product Management"/>
                <node label="Personal"/>
            </node>
            <node label="Outbox">
                <node label="Professional"/>
                <node label="Personal"/>
            </node>
            <node label="Spam"/>
            <node label="Sent"/>
        </node>    
    </mx:XMLList>

    <mx:Panel title="Tree Control Example" height="75%" width="75%" 
        paddingTop="10" paddingLeft="10" paddingRight="10" paddingBottom="10">

        <mx:Label width="100%" color="blue" 
            text="Select a node in the Tree control."/>

        <mx:HDividedBox width="100%" height="100%">
            <mx:Tree id="myTree" width="50%" height="100%" labelField="@label"
                showRoot="false" dataProvider="{treeData}" change="treeChanged(event)"/>
            <mx:TextArea height="100%" width="50%"
                text="Selected Item: {selectedNode.@label}"/>
        </mx:HDividedBox>
        
    </mx:Panel>
</mx:Application>

2:ArrayCollection 绑定

[Bindable]
private var treeDate:XMLList=new XMLList();

private function onGetModouleHelpInfo(mEvt:JAEvent):void

{

 　　treeDate=GetTreeXMl(ReportAC);
  

}
public function GetTreeXMl(mValue:ArrayCollection):XMLList
{
    var result:XML=new XML('<root/>');
    result=GetXML(mValue,"0",result)
    return result.children()
}
private function GetXML(mValue:ArrayCollection,mParentNode:String,mXML:XML):XML
{
    var result:XML=mXML;
    if(mValue==null)
    {
        return result;
    }
    for(var i:int=0;i<mValue.list.length;i++)
    {
        if(mValue[i].ParentNode==mParentNode)
        {
            var xmlNode:XML;
            xmlNode=GetTreeNode(mValue[i]);
            var node:String=mValue[i].Name;
            mValue.removeItemAt(i);
            i--;
            xmlNode=GetXML(mValue,node,xmlNode);
            result.appendChild(xmlNode);
            
        }
    }
    return result;
}
private function GetTreeNode(mValue:Object):XML
{
    var node:XML=new XML("<node/>"); 
    node.@Label=mValue.ChinaName;
    node.@Help=mValue.Help;
    node.@ParentNode=mValue.ParentNode;
    node.@Node=mValue.Name;
    return node;
}


 <mx:Tree id="treList" labelField="@Label"  height="100%" width="100%"
             
   dataProvider="{treeDate}"   change="selectAC(event)"   />