flex blazeds 異步加載tree

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
				layout="absolute"
				creationComplete="initTreeData()"
				xmlns:lns="com.render.*">
	<!--異步加載節點的樹-->
	<mx:Script>
		<![CDATA[
			import mx.controls.Alert;
			import mx.events.TreeEvent;
			import mx.collections.ArrayCollection;
			import com.sevice.funService.FunService;
			import mx.events.ListEvent;

			[Embed("com/assets/loading.swf")]
			private var loadingIcon:Class;
			[Embed("com/assets/foldericon.png")]
			public var foldericon:Class;
			[Embed("com/assets/openfoldericon.png")]
			public var openfoldericon:Class;

			[Bindable]
			public var loadingxml:XMLList;


			private function initTreeData():void
			{
				var cm:FunService=new FunService();
				cm.getNodebyfunid(this);

			}

			private function tree_itemClick(evt:ListEvent):void
			{
				var cm:FunService=new FunService();
				var selectedNode:XML=treeSiteList.selectedItem as XML;
				var item:Object=AsyncTree(evt.currentTarget).selectedItem;

				if (treeSiteList.dataDescriptor.isBranch(item))
				{
					if (selectedNode.@isclicked == "false")
					{
						treeSiteList.setItemIcon(selectedNode, foldericon, loadingIcon);

						cm.getNodebyfunid2(this, selectedNode.@id, selectedNode);
						treeSiteList.expandItem(item, true, true);
					}else
					treeSiteList.expandItem(item, !treeSiteList.isItemOpen(item), true);

				}
			}

			private function tree_itemOpening(evt:TreeEvent):void
			{
				treeSiteList.selectedItem=evt.item;
				var cm:FunService=new FunService();
				var selectedNode:XML=treeSiteList.selectedItem as XML;
				var item:Object=AsyncTree(evt.currentTarget).selectedItem;

				if (treeSiteList.dataDescriptor.isBranch(item))
				{
					if (selectedNode.@isclicked == "false")
					{
						treeSiteList.setItemIcon(selectedNode, foldericon, loadingIcon);

						cm.getNodebyfunid2(this, selectedNode.@id, selectedNode);

					}
				//treeSiteList.expandItem(item, !treeSiteList.isItemOpen(item), true);

				}
			}

//			private function setView(ev:TreeEvent):void
//
//			{
//				//	Alert.show("123");
//				//	var item:XML=AsyncTree(event.currentTarget).selectedItem as XML;
//
//				treeSiteList.selectedItem=ev.item;
//				var cm:FunService=new FunService();
//				var selectedNode:XML=treeSiteList.selectedItem as XML;
//				var item:Object=AsyncTree(ev.currentTarget).selectedItem;
//
//				if (treeSiteList.dataDescriptor.isBranch(item))
//				{
//					if (selectedNode.@isclicked == "false")
//					{
//
//						treeSiteList.setItemIcon(selectedNode, foldericon, loadingIcon);
//
//						cm.getNodebyfunid2(this, selectedNode.@id, selectedNode);
//
//					}
//						//treeSiteList.expandItem(item, !treeSiteList.isItemOpen(item), true);
//				}
//
//			}
		]]>
	</mx:Script>
	<mx:Canvas width="100%"
			   height="450">

		<mx:VBox x="20"
				 y="20">
			<lns:AsyncTree id="treeSiteList"
						   x="20"
						   dataProvider="{loadingxml}"
						   y="10"
						   height="400"
						   width="394"
						   labelField="@label" 
						   itemClick="tree_itemClick(event);"
						   itemOpening="tree_itemOpening(event);"
						  >
			</lns:AsyncTree>
		</mx:VBox>

	</mx:Canvas>
</mx:Application>

AsyncTree文件的內容

package com.render
{
	import mx.controls.Tree;
	import mx.events.TreeEvent;
	import flash.events.Event;


	public class AsyncTree extends Tree
	{
		public function AsyncTree()
		{
			super();
		}


	}
}

FunService.cs部分代碼

public function getNodebyfunid(tree:delayLoadingTree2):void
		{
			loadingtree=tree;
			var getCataLogRemoteObject:RemoteObject=new RemoteObject("FunService");
			getCataLogRemoteObject.addEventListener(FaultEvent.FAULT, getNodebyfunidFault);
			getCataLogRemoteObject.addEventListener(ResultEvent.RESULT, getNodebyfunidResult);
			getCataLogRemoteObject.getNodebyfunid("ITS");

		}

		public function getNodebyfunidFault(event:FaultEvent):void
		{
			Alert.show(event.fault.message);
		}

		public function getNodebyfunidResult(event:ResultEvent):void
		{
			//curTree
			var treexml:XMLList=new XMLList(String(event.result));

			loadingtree.loadingxml=treexml;
			//	showList(treexml);
		/* loadingtree.labelField="@label"; */

		}

		public function getNodebyfunid2(tree:delayLoadingTree2, id:String, repxml:XML):void
		{
			loadingtree=tree;
			xml=repxml;
		//	this.item=item;
			var getCataLogRemoteObject:RemoteObject=new RemoteObject("FunService");
			getCataLogRemoteObject.addEventListener(FaultEvent.FAULT, getNodebyfunidFault2);
			getCataLogRemoteObject.addEventListener(ResultEvent.RESULT, getNodebyfunidResult2);
			getCataLogRemoteObject.getNodebyfunid(id);

		}

		public function getNodebyfunidFault2(event:FaultEvent):void
		{
			Alert.show(event.fault.message);
		}

		public function getNodebyfunidResult2(event:ResultEvent):void
		{
			//curTree
			//var treexml:XMLList=new XMLList(String(event.result));

			//	Alert.show(new XMLList(event.result));
			//showList(new XMLList(String(event.result)));
			xml.@isclicked="true";
			var newxml:XML=xml.appendChild(new XMLList(event.result));
			//還原圖標
			loadingtree.treeSiteList.setItemIcon(xml, loadingtree.foldericon, loadingtree.openfoldericon);
			//
			loadingtree.treeSiteList.expandItem(xml, false, true);
			loadingtree.treeSiteList.expandItem(xml, true, true);
//	Alert.show(newxml);

			//	var treexml:XMLList=new XMLList(xmlString);
			//	loadingtree.labelField="@label";

		}

FunServiceImpl.java部分代碼，目的是獲得下一級節點

public String getNodebyfunid(String funid) {
		String FlexTreeNodeString = "";
		String isBranch = "false";
		allFuns = this.findFunsByUser("32672");
		FunctionDTO[] fs = this.findFunByParentID(funid);
		if (fs != null) {
			for (int j = 0; j < fs.length; j++) {

				if (ishasChild(fs[j].getFuncid()) == true) {
					isBranch = "true";
				}
				FlexTreeNodeString = FlexTreeNodeString + "<Node id='"
						+ fs[j].getFuncid() + "'" + "isBranch ='" + isBranch
						+ "'" + " label=" + "'" + fs[j].getFuncname()
						+ "' isclicked='false'>";
				FlexTreeNodeString = FlexTreeNodeString + "</Node>\n";
			}

		}
		return FlexTreeNodeString;
	}