Flex Tree all expand by default Select any one of the node processing

1. XML Original format

<fx:xmllist id= "Menuxml" >
   <Root>
	<node sid= "029"
	      sname= "Six Huan Qu Toll station"
	      mydata= "GLOBAL" >
	  <node sid= "029710000"
	        sname= "inner ring Exit"
		pid= "029"
		mydata= "Exit" >
	   <node sid= "01002"
		 sname= "Outside First Lane"
		 Pid= "029710000"
		 sflag= "0"
		 mydata= "LANE"/>
	   </NODE>
	</NODE>
 </root >
</fx:XMLList>

2, select a node, this node through @mydata already know is that type

                                var xmlstring:string=menuxml;
				if (xmlstring! = "<Root/>")
				{
					this.xml=new xml (xmlstring);
					Loop the data of the last layer of nodes, which is the node data that should be selected, which can be set according to the hierarchy of the node for every
					(Var treeitem:xml in Xml.children (). Children (). Children ( )
					{
						//If it is a parking unit, select and obtain the relevant information
						if (treeItem. @MYDATA = = "LANE")
						{
							Tree_id.selecteditem=treeitem ;
							Break;}}}

				

3. Expand All

			        if (!tree_id.isitemopen (XML (This.xml.NODE)))
				{
					This.tree_id.expandItem (XML (This.xml.NODE), true, true);
				}
				//Expand first-level node
				//	This.tree_id.expandItem (XML (this.xml. NODE. (@MYDATA = = "GLOBAL"), true, true);
				Expand all nodes
				for every (Var item:object in Tree_id.dataprovider)
				{
					tree_id.expandchildrenof (item, True);
				}

4. Perform other methods after selecting the node

			      Gets the default selected node information
				tree_id.calllater (function (): void
					{
						if (tree_id.selecteditem! = null)
						{
							Parknamestr=global_tree.selecteditem. @SNAME;
							Parkidstr=global_tree.selecteditem. @SID;
							Parkcostobj.findcostlist (PARKIDSTR); Execution method
						}
					});