Comments on: Detecting whether an image loaded successfully in Flex

By: Bruno

Bruno — Fri, 19 Aug 2011 21:02:58 +0000

For who is looking for an answer, test if the content is Bitmap, e.g.:

var image:Image;
//load image
…
trace(image.content is Bitmap); // true if its is loaded

By: Cory

Cory — Fri, 08 Jul 2011 18:09:02 +0000

Detecting if an image loaded successfully is as easy as 1.. 2.. 3.. 4……

This seems to be what is needed to get a reliable cross-browser load/fail for swfloader… what a PITA…

1. complete + init events. and compare bytes to make sure you have everything. See http://numiko.com/labs/?p=268

2. ioError

3. Wrap your .load call with a try/catch to make sure you get any security errors, and then fire the load fail event manually if you do.

4. Manual timeout. You need to write something that will track how long a load() has been active and timeout at some reasonable time for your app. You then need to cancel the SWFLoader so that it doesn’t eventually fire a complete/error down the road. Looks like SWFLoader.unloadAndStop can so this, though I’m not 100%.

Since swfloader doesn’t seem to have a timeout, it will wait as long as the remote server keeps your connection open and waiting (and your browser doesn’t kill it).

In theory, a web server could send one byte at a time and keep swfloader waiting indefinitely.

One example: In FF, I was contacting IIS for a site that has been stopped, it seems to take 1-2 minutes before the connection finally stops and flash hits an ioError event.

In the meantime, flash fires no events that I can see, ioError or otherwise. So for that entire time, your user will just be waiting, wondering what is going on.

By: simone

simone — Mon, 09 May 2011 17:11:57 +0000

Hi, i’m using this procedure to check if image loaded correctly, but I’m having problem on setting a default image when an error occurs. I would like to switch back to a default embedded image when server is returning other than 200 code.

By: Ling's

Ling's — Tue, 11 May 2010 11:58:51 +0000

Hi.,
I am using mx:MenuBar id=”testmenu” labelField=”menuLabel” iconField=”menuIcon” dataProvider=”{Datamenu}” width=”100%” itemClick=”ClickMenuItem(event);” click=”Select_MenuBar(event);”

iconField is using class name as menuIcon is url image file.. how to load url image file to icon field.,

Any one help me..

Ling’s

By: Ling's

Ling's — Tue, 11 May 2010 11:55:43 +0000

Hi.,
I am using

iconField is using class name as menuIcon is url image file.. how to load url image file to icon field.,

Any one help me..

Ling’s

By: Peter deHaan

Peter deHaan — Mon, 10 May 2010 14:38:49 +0000

@Daniel,

You could try using a timer that runs every X seconds and does an HTTP get of a small file on your server. If the server connection fails, it is likely that the server or the internet connection is down and you could possibly display an alert/dialog.

Peter

By: Daniel Dourado

Daniel Dourado — Mon, 10 May 2010 13:11:41 +0000

Hi Peter,

How can I send a message to the user when the connection to the internet drops?

By: Steve

Steve — Thu, 30 Apr 2009 21:11:06 +0000

Brian – your solution seems to work for me across browsers. Thanks a lot.

By: Brian

Brian — Wed, 18 Mar 2009 21:26:53 +0000

I'm using and it seems to work fine in both IE and Firefox

By: Bryan

Bryan — Sat, 07 Mar 2009 00:19:45 +0000

I’ve found that the ioError Event is launched if there is a problem loading the image.
That’s enough for me to know that I need to change the image for a “Not available photo” image, and it work in Firefox, so I suppose it is not browser dependant.

Hope that helps someone with a similar problem.