How to display a UserControl with satisfying all imports

I'm having some issues with Silverlight 4/ MEF. I have a basic framework setup with a Silverlight Navigation app at t开发者_StackOverflowhe core.

Image link to the diagram for clarification

The main app (Desu) contains some pages and controls that export en import nicely. I dynamicly load controls from Desu.Controls(like an imageviewer which i identify with the IImageViewer interface) and some pages from Desu.Pages.

The first problem I had was with dynamicly loading pages and being able to navigate to these pages (eg. use dummyhttp://blagh/desutestpage.aspx#/Activation when Desu.Pages was loaded from the xap). I solved this by using a custom MetaAttribute and a custom contentloader.

Now for the question part: I want to load the ImageViewerControl from Desu.Controls in HomePage in Desu. I haven't loaded the Desu.Controls into the package though. When i try to load the control it gives me CompositionException because it can't satisfy the ImageViewControl import. I tried setting AllowRecomposition=true but that didn't help.

So is it possible to load a control without satisfying all imports and, if yes, how does one do this?

So you want the import to initially not be satisfied, but you want it to be added later?

You were on the right track with setting AllowRecomposition=true, but you also need to set AllowDefault=true. Then the property will be null if the ImageViewerControl isn't available, and will be set when it becomes available.