Populating a Tree data provider dynamically

Question

Hi,
I have made an XMLLIstCollection as the data provider of a
Tree control. I want to add the tree nodes dynamically. Now the
problem is that I am able to add a node to the collection but not a
sub-node. Can anybody plz tell me the way to do it?
Thanks,
Cheree

Answer 1

I tried with your code the following mxml program:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
creationComplete="initApp()">
<mx:Script>
<![CDATA[
import mx.collections.XMLListCollection;
[Bindable]
public var a:XMLList=new XMLList();
[Bindable]
public var xml:XML;
[Bindable]
public var coll:XMLListCollection=new XMLListCollection(a);
public var xmlIn:String = "<node label='new'/>";
public var xmlNode:XML=new XML(xmlIn);
public function initApp():void{
xml= <node label="sdf" isBranch="true"/>;
coll.addItem(xml);
xml=<node label="sdf">{xml}</node>;
coll.addItem(xml);
xml=<node label="goi">{a}</node>;
//xml.node[0].subnode[0].appendChild(xmlNode);
coll.addItemAt(xml,0);
]]>
</mx:Script>
<mx:Tree id="myTree" dataProvider="{coll}"
labelField="@label"/>
</mx:Application>
If I uncomment the line that you suggested, I get the error :
TypeError: Error #1010: A term is undefined and has no
properties.
at TestFile2/initApp()
at TestFile2/___Application1_creationComplete()
at
flash.events::EventDispatcher/flash.events:EventDispatcher::dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.core::UIComponent/set initialized()
at mx.managers::LayoutManager/::doPhasedInstantiation()
at Function/
http://adobe.com/AS3/2006/builtin::apply()
at mx.core::UIComponent/::callLaterDispatcher2()
at mx.core::UIComponent/::callLaterDispatcher()