CODEWITHSUNDEEP
c#wpfprism-4
Ramin Bateni
Ramin Bateni

Reputation: 17415

WPF Prism error while showing a Window include a Region

I'm working on my WPF Prism application and trying to show some of my different Views in a Region. So i use the following code in my Shell.xaml and it works well (it shows multiple view under each-other).

<ItemsControl x:Name="MainRegion" prism:RegionManager.RegionName="WorkspaceRegion" Width="400"/>

I have an another Window named WinExtra.xaml. My application creates an instance of it at Run-Time when user click on a Button in Shell.xaml.

Inside the WinExtra i have some TabControl and inside theme i keep my UserControls.

Now i want to put the same Region like above inside one of these UserControls. so i write the above code again but this time inside WinExtra.xaml> TabControl1> TabItem1> UserControl1.xaml:

<ItemsControl x:Name="MainRegion" prism:RegionManager.RegionName="WorkspaceRegion" Width="400"/>

But after i create an instance of WinExtra on Showing it, i get this error:

An unhandled exception of type 'Microsoft.Practices.Prism.Regions.Behaviors.RegionCreationException' occurred in Unknown Module.

Additional information: An exception occurred while creating a region with name 'WorkspaceRegion'. The exception was: System.Collections.Generic.KeyNotFoundException: The IRegionAdapter for the type System.Windows.Controls.ItemsControl is not registered in the region adapter mappings. You can register an IRegionAdapter for this control by overriding the ConfigureRegionAdapterMappings method in the bootstrapper.

at Microsoft.Practices.Prism.Regions.RegionAdapterMappings.GetMapping(Type controlType)

at Microsoft.Practices.Prism.Regions.Behaviors.DelayedRegionCreationBehavior.CreateRegion(DependencyObject targetElement, String regionName).

Note: I use MahApps.Metro in this project. and all window types are controls:MetroWindow

Upvotes: 3

Views: 2342

Answers (2)

Ramin Bateni
Ramin Bateni

Reputation: 17415

I founded the error reason & solved it.

I was loading Prism dll assembly during loading my module assembly after showing shell.

Now i prevent this prism dll loading and have not any RegionCreationException in my project

Upvotes: 0

Lorentz Vedeler
Lorentz Vedeler

Reputation: 5301

For me the problem was that I had a reference to the old Prism.Composition package which caused a conflict. A simple Uninstall-Package Prism.Composition <Project> -Force fixed the issue.

Upvotes: 0

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