RE: [flexcoders] Populating ComboBox from Model/XML

Tracy Spratt Mon, 24 Jul 2006 12:16:50 -0700

I have never liked Model, a personal problem, I know.

Below is an example using HTTPService, my best friend. Debugging binding is hard, so I almost always use a result handler, again as below. Note that it assumes the xml file in in an assets folder. Change that if necessary.

Tracy

<?xml version="1.0" encoding="utf-8"?>

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"

creationComplete="dsVideos.send();">

<mx:Script><![CDATA[

import mx.collections.XMLListCollection;

import mx.rpc.events.ResultEvent;

private function onResult(oEvent:ResultEvent):void

{

var xlcDP:XMLListCollection = new XMLListCollection(oEvent.result.titles.title);

list1.dataProvider = xlcDP; //assign XML XMLList to data Provider

}//onResult

private function lfnConcat(item:Object):String

{

return (item.className + " (" + item.duration + " hrs.)");

}//lfnConcat

]]></mx:Script>

<mx:HTTPService id="dsVideos" url="" result="onResult(event)" resultFormat="e4x"/>

<mx:List id="list1" labelFunction="lfnConcat" width="300"/>

</mx:Application>

-- videoTitles.xml --

<?xml version="1.0"?>

<root>

<title>

<className>Flash User Experience Best Practices</className>

</title>

<title>

<className>Flash Professional 8 New Features</className>

</title>

<title>

<className>Flash Professional 8 Essential Training</className>

</title>

<title>

<className>Flash Professional 8 Beyond the Basics</className>

</title>

<title>

<className>Flash Professional 8 Video Integration</className>

</title>

<title>

<className>Photoshop CS2 and Flash 8 Integration</className>

</title>

</titles>

</root>

From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of John Mazzocchi
Sent: Friday, July 21, 2006 2:58 AM
To: [email protected]
Subject: [flexcoders] Populating ComboBox from Model/XML

Hi, newbie question here ... just learning. I'm using Flex 2. There seem to be numerous errors and typos in the Adobe Flex Help files/PDFs and I'm hitting a snag here ...

What I'd like to do, to begin with, is to populate a ComboBox from an external XML file. The section in the help files called "Populating a ComboBox control using variables and models" seems pertinent, but the second part of example doesn't work.

The relevant code is this ...

<mx:Model id="myDP">
<obj>
<item label="AL" data="" w:st="on">Montgomery"/>
<item>
<label>AK</label>
<data>Juneau</data>
</item>
<item>
<label>AR</label>
<data>Little Rock</data>
</item>
</obj>
</mx:Model>

<mx:ArrayCollection id="stateAC" source="{myDP.obj.item}"/>

<mx:ComboBox dataProvider="{stateAC}"/>

Should I be using XML or XMLList instead? Later I'd like to have the dataProvider be from an external source (HTTPService or WebService), but I can't even get this simpler code to work. Any help appreciated. Thanks.

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RE: [flexcoders] Populating ComboBox from Model/XML

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