Class that provides a dynamic implimentation of the URLLoader class. This class provides no API implimentations. However, since the class is declared as dynamic, it can be used in place of URLLoader, and allow you to dynamically attach properties to it (which URLLoader does not allow). This class is simple but useful when you want to transfer arguments together with URLLoader.

Demo | Download Full Project

Demo

This demo loads external XML with an instance of DynamicURLLoader and attach the URL of XML file as a property of the instance. When the loading is complete, show the URL of the XML as the status of the main panel according to the attached property url of the complete event target. Meantime, set the dataProvider property of the list according to the data property of the complete event target.

data.xml

<?xml version="1.0" encoding="utf-8"?>
<images>
	<image name="folder_apple_close" path="assets/images/folder_apple_close.png"/>
	<image name="folder_apple_with_file" path="assets/images/folder_apple_with_file.png"/>
	<image name="folder_apple" path="assets/images/folder_apple.png"/>
	<image name="folder_cd" path="assets/images/folder_cd.png"/>
	<image name="folder" path="assets/images/folder.png"/>
</images>

DynamicURLLoaderDemoBehind.as

package
{
	import com.adobe.net.DynamicURLLoader;

	import flash.events.Event;
	import flash.net.URLRequest;

	import mx.collections.XMLListCollection;
	import mx.controls.List;
	import mx.core.Application;

	public class DynamicURLLoaderDemoBehindextends Application
	{
		public function DynamicURLLoaderDemoBehind()
		{
			super();
		}

		public var imageInfoList:List;

		[Bindable]
		private var dynamicLoader:DynamicURLLoader;

		[Bindable]
		protected var status:String;

		protected function loadData():void
		{
			if(!dynamicLoader)
			{
				dynamicLoader = new DynamicURLLoader();
				dynamicLoader.addEventListener(Event.COMPLETE, onLoadXML);
			}
			////////////////////////////////////////
			//
			// url of dynamicLoader is an attached
			// property.
			//
			dynamicLoader.url = "assets/data/data.xml";
			//
			////////////////////////////////////////

			dynamicLoader.load(new URLRequest(dynamicLoader.url));

			status = "loading data";
		}	

		private function onLoadXML(event:Event):void
		{
			status = "loaded data from " + event.target.url;
			imageInfoList.dataProvider = new XMLListCollection(XML(event.target.data).children());
		}

	}
}

DynamicURLLoaderDemo.mxml

<?xml version="1.0" encoding="utf-8"?>
<DynamicURLLoaderDemoBehind
	xmlns="*"
	xmlns:mx="http://www.adobe.com/2006/mxml"
	layout="absolute">
	<mx:Panel
		title="DynamicURLLoader Demo"
		width="100%"
		height="100%"
		status="{status}"
		>
		<mx:List id="imageInfoList"
			labelField="@name"
			itemClick="image.source = imageInfoList.selectedItem.@path"/>   <mx:Image id="image"/>   <mx:ControlBar>
			<mx:Button label="Load Images Info" click="loadData()"/>
		</mx:ControlBar>
	</mx:Panel>
</DynamicURLLoaderDemoBehind>

Enjoy!