reading values from xml file in actionscript 3 into a combobox -

my layout in .mxml file this:-

<?xml version="1.0" encoding="utf-8"?>       <s:windowedapplication xmlns:fx="http://ns.adobe.com/mxml/2009"                             xmlns:s="library://ns.adobe.com/flex/spark"                             xmlns:mx="library://ns.adobe.com/flex/mx" width="600" height="800" >         <fx:declarations>             <!-- place non-visual elements (e.g., services, value objects) here -->         </fx:declarations>         <mx:hbox width="100%" horizontalalign="right" top="20">             <mx:combobox id="combobox" fontsize="12" width="10%" dataprovider="{middlestack}"  name="versioncombo"/>         </mx:hbox>         <mx:vbox top="50" left="10" >             <mx:label text="builds" fontsize="18">             </mx:label>             </mx:vbox>         <mx:vbox top="50" horizontalalign="center" left="200">             <mx:label text="date" fontsize="18">             </mx:label>         </mx:vbox>         <mx:vbox top="50" horizontalalign="center" right="10">             <mx:label text="release" fontsize="18">             </mx:label>         </mx:vbox>         <mx:vbox height="100%" width="100%" stylename="centerlightgreybg" verticalgap="0">              <mx:viewstack id="middlestack" width="100%" height="100%" backgroundalpha="0" change="changev()">             </mx:viewstack>          </mx:vbox>         <fx:style> 

now want add values combo box id = combobox , name = versioncombo reading values xml file. xml this.

<install>   <version>     <number>5.0</number>     <build>907681</build>     <path></path>    </version>   <version>     <number>6.2</number>     <build>1043305</build>     <path></path>    </version> </install> 

i want populate combo box version number i.e 5.0,6.2.

i tried follow link not able http://www.parorrey.com/blog/flash-development/as3-adding-dropdown-combobox-flash-component-using-actionscript-with-xml-data/

as3 procedural. randomise order of items in combobox xml

i new air.

i tried this:-

import fl.data.dataprovider;               var country:string='';             var countrieslist:array = [];              //urlloader class helps load data external source such url              var xmlloader:urlloader ;              var xmldata:xml = new xml();               public function pathfinding() {                 // constructor code                 xmlloader = new urlloader();                 xmlloader.addeventlistener(event.complete, loadxml);                 xmlloader.load(new urlrequest("grid.xml"));             }              function loadxml(e:event):void {                  xmldata = new xml(e.target.data);                  xmldata.ignorewhite = true;                  parsecountries(xmldata);                  //trace(xmldata);             }               function parsecountries(countriesinput:xml):void {                   var countrieslisting:xmllist = countriesinput.country.attributes();                  var i:int;                    each (var countryname:xml in countrieslisting) {                       //populate countrieslist array used combobox                     countrieslist.push( {label:countryname, data:countryname} );                     trace(countryname);                  }                  versioncombo.prompt = "select version:";                  versioncombo.dataprovider = new dataprovider(countrieslist);                  versioncombo.addeventlistener(event.change, dropdownhandler);                 versioncombo.dropdown.rowheight  = 30;                 versioncombo.width = 150;              }                function dropdownhandler(event:event):void {                   country = combobox(event.target).selecteditem.data;                      trace("selected country: "+ country);                 //do here whatever want              }    combobox.prompt = "select country:";              combobox.dataprovider = new dataprovider(countrieslist);              combobox.addeventlistener(event.change, dropdownhandler);             combobox.dropdown.rowheight  = 30;             combobox.width = 150; 

but getting error "-1180: call possibly undefined method dataprovider."

                combobox.dataprovider = new dataprovider(countrieslist);  

not working me.

you need read about correct work dataprovider. didn't need new instance creation, "new dataprovider". please, use arraycollection or of ilist