Using LoaderInfo to get params from HTML

Question

Hi All
Working my way throught the new things in AS3. One problem is
getting <params> passed to the .swf from the HTML file. I can
make it work if the code is embedded via Actions on frame 1, but
not when the code is in an external .as file! The example I'm
playing with is the 'Dynamic video playlist'...
http://www.adobe.com/devnet/flash/articles/video_playlist.html
and the amendments I've made in the VideoPlaylist.as file are
as <=====ADDED below...
ALL HELP/COMMENTS MUCH APPRECIATED, thank you
ROBERT
package {
import flash.display.MovieClip;
import flash.display.LoaderInfo; <=====ADDED
import flash.net.URLLoader;
import flash.net.URLRequest;
import flash.events.Event;
import fl.controls.listClasses.CellRenderer;
import fl.controls.ScrollBarDirection;
public function VideoPlaylist():void {
// Load the playlist file, then initialize the media player.
xmlLoader = new URLLoader();
xmlLoader.addEventListener(Event.COMPLETE, initMediaPlayer);
//xmlLoader.load(new URLRequest("playlist.xml"));
<=====ADDED commented out
var playlist = this.loaderInfo.parameters.xmlfile;
<=====ADDED
xmlLoader.load(new URLRequest(playlist)); <=====ADDED
argument change
etc etc...
The error report is...
TypeError: Error #2007: Parameter url must be non-null.
at flash.net::URLStream/load()
at flash.net::URLLoader/load()
at VideoPlaylist()
And the HTML code is this for the xmlfile parameter I'm
trying to read in...
<object
classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="
http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0"
width="538" height="290" id="VideoPlaylist" align="middle">
<param name="allowScriptAccess" value="sameDomain" />
<param name="allowFullScreen" value="true" />
<param name="movie" value="VideoPlaylist.swf" />
<param name="loop" value="false" />
<param name="quality" value="high" />
<param name="bgcolor" value="#ffffff" />
<param name="xmlfile" value="playlist.xml">
<embed src="VideoPlaylist.swf" width="538" height="290"
loop="false" align="middle" quality="high" bgcolor="#ffffff"
name="VideoPlaylist" allowscriptaccess="sameDomain"
allowfullscreen="true" type="application/x-shockwave-flash"
pluginspage="
http://www.macromedia.com/go/getflashplayer"
xmlfile="playlist.xml" />
</object>

Answer 1

Many thanks for both your replies. I used Dreamweaver's
Parameters 'helper' to put the params in, and they were placed in
AC_FL_RunContent() correctly. I also tried the FlashVars variations
with the same result. As said I have made it work when the
retreival code is in the main swf file, but it just won't work for
me when the coding is in an external .as file.
Thanks again
ROBERT