Comments on: On-demand loading of assemblies with Silverlight Navigation

By: david.poll

david.poll — Wed, 08 Jun 2011 01:08:11 +0000

Hyacinth,

Really, you’re not going to get anything out of dynamically loading anything that’s part of the runtime (e.g. Mscorlib). The only libraries that will be able to take advantage of this technique are those that are otherwise getting packaged into your XAP. Everything else is already local on users’ machines, meaning you already avoid paying the download cost for them — and they’re likely to be loaded anyway just because they’re so core to the runtime itself.

By: Hyacinth Broadchest

Hyacinth Broadchest — Wed, 08 Jun 2011 01:03:33 +0000

David, thank you so much. You have no idea how long I struggled with the Silverlight-navigation+dynamic-loading problem.

My question is, how much of the framework can I hve dynamically loaded, or is it a waste of time. For example, System.Windows.zip, System.Core.zip, mscorlib.zip, System.Net.zip? At some point I figure that there is no point in trying to delay loading of the kernel, but where is that point? Many thanks, Hyacinth.

By: david.poll

david.poll — Mon, 26 Apr 2010 01:03:59 +0000

Unfortunately, at the moment, you can’t post XML in my comments section. I’ll try to fix this going forward. In the meantime, you can e-mail me at david at depoll dot com, and I’ll try to help you out.

By: Sam Kea

Sam Kea — Sun, 25 Apr 2010 12:03:28 +0000

Sam Kea : Hi David. I am trying to use the shim pages sample for authentication. How does the UriPattern Looklike? Below is what io have but isnt working for me.

By: Sam Kea

Sam Kea — Sun, 25 Apr 2010 12:02:41 +0000

By: Sam Kea

Sam Kea — Sun, 25 Apr 2010 11:47:01 +0000

Hi David.
I am trying to use the shim pages sample for authentication. How does the UriPattern Looklike?
Below is what io have but isnt working for me.

By: Helen Warn

Helen Warn — Fri, 09 Apr 2010 21:51:09 +0000

I have noticed with IIS6 that sometimes when you set mime types at the root level, they don’t get propagated down to child virtual directories (this got me several times in the past), but both .xap and .xaml mime types are set. Do I need to add .dll types? I tried but it didn’t seem to make a difference.

My clientaccesspolicy file allows every porn site on the planet in (i.e. it is wide open). Fiddler just gives me a 500 error.

Any other suggestions as to how I can debug this?

Thanks a bunch

Helen

By: david.poll

david.poll — Fri, 09 Apr 2010 17:48:51 +0000

The easiest way to do this is to put styles in your App.xaml. In your other projects, add a link to the App.xaml file in your main project, and set the build action not to build it into the XAP. This should allow you to work with your pages that use resources in the App.xaml in the designers.

As for just loading dlls on demand, I don’t have a super-simple sample, but you can take a look at my old post from SL3: http://www.davidpoll.com/2009/07/20/on-demand-loading-of-assemblies-with-silverlight-navigation/

That post does allow you to load directly from a dll, if I recall correctly. It’s a different model because there was no INavigationContentLoader, but the mechanism is otherwise the same, and you could modify the XapContentLoader I wrote to also work with dlls as targets.

By: david.poll

david.poll — Fri, 09 Apr 2010 17:44:56 +0000

I haven’t seen this type of behavior myself. In fact, if you look at my sample application, it’s doing a cross-domain load from one of my other servers (that’s actually a linux server running php). The server type shouldn’t matter… Could it be that you’re missing a MIME type for .xap files on your IIS 6 server?

-David

By: Helen Warn

Helen Warn — Thu, 08 Apr 2010 20:01:22 +0000

I am finding that if I use the VS development web server this all works fine, but as soon as I use IIS (6) the Loader cannot seem to resolve the URLs. Any ideas?

Thx

Helen