Prism 4 in Silverlight with MEF CompositionInitializer

re: Prism 4 in Silverlight with MEF CompositionInitializer

Dragan Kovacevic — Thu, 14 Apr 2011 22:04:01 GMT

Hey brumfb1,

Thanks for simple and useful article. I needed that. I do have problem though. In my project when I try to inject view in module's Initialize() method with

this.RegionManager.Regions[RegionNames.MainNavigationRegion].Add(new FillRateNavigationItemView());

I get an exception because regions are not created. I think that I implemented everything like in your example. I do have one diference though. I am using ConfigureAggregateCatalog like in a example above instead CreateModuleCatalog like in your example. I am not even sure why I do that.

Would you guys know why the regions are not created at that time?

Thanks, Dragan

re: Prism 4 in Silverlight with MEF CompositionInitializer

Michael Baarz — Thu, 13 Jan 2011 11:30:34 GMT

@Reggie:

Use something similar like the following code in your bootstrapper to create your AggregateCatalog manually:

protected override void ConfigureAggregateCatalog()

{

base.ConfigureAggregateCatalog();

AggregateCatalog.Catalogs.Add(new AssemblyCatalog(typeof(AppBootstrapper).Assembly));

AggregateCatalog.Catalogs.Add(new AssemblyCatalog(typeof(StatisticViewModelBase).Assembly));

}

Greetings, Michael

re: Prism 4 in Silverlight with MEF CompositionInitializer

Reggie Chen — Mon, 10 Jan 2011 18:00:41 GMT

Hi,

Thanks for the example! I want to make the shared TimeService available in App.xaml.cs.

Adding a reference

[Import]

public ITimeService ts { get; set; }

to App class create a "No valid exports were found that match the constrain..." error

What need to be done to access the remote serivce module via its interface ( ITimeService ) ? I've tried several examples with or without CompositionInitializer(), they produce the same error of not finding the exports. It will be fine if I load the module explicitely from code via AggregateCatalog, but not through deployment catalog in XML. Why?

Regards,

Reggie