Question: Couldn't xaml host controls from the WinUI 3 library

[Ajith-GS]

According to WinUI roadmap table, which is available in the following link https://github.com/microsoft/microsoft-ui-xaml/blob/main/docs/roadmap.md the XAML Islands is available as experimental feature in Windows App SDK 1.0. I have been trying to modernize an existing Win32 app with WinUI 3 ( used template : [Experimental] Blank App (WinUI 3 in UWP) , C++ ) by using the steps described in the following page https://docs.microsoft.com/en-us/windows/apps/desktop/modernize/host-custom-control-with-xaml-islands-cpp. But when replacing namespace Windows with Microsoft, the app.base.h file generating build errors like,
'TypeName': is not a member of 'winrt::Microsoft::UI::Xaml::Interop' (compiling source file App.cpp).
So, what is the proper way for hosting controls from the WinUI 3 library using XAML Islands ?
and is any document available for hosting controls from the WinUI 3 library with XAML Islands support ?

[ojhad]

TypeName and TypeKind are still under the Windows namespace. Can you try updating this and see if that resolves your issues?

[Ajith-GS]

When replacing namespace Microsoft with Windows, the XamlTypeInfo.g.cpp file generate build errors like,
'Markup': is not a member of 'winrt::Windows::UI::Xaml'
'IXamlMetadataProvider': is not a member of 'winrt::Windows::UI::Xaml'
'winrt::Windows::Foundation::Collections::IVector': 'IXamlMetadataProvider' is not a valid template type argument for parameter 'T'

[castorix]

The links you posted are for hosting UWP controls, not WinUI 3 controls
XAML Islands is not ready : under-consideration
Some XAML controls can be used in C++/Win32 apps like the test I did in this thread
but there are limitations and it is just a workaround

[Ajith-GS]

Little bit confused here. So it is not available as an experimental feature in Windows App SDK 1.0, is it? But the WinUI roadmap table ( https://github.com/microsoft/microsoft-ui-xaml/blob/main/docs/roadmap.md ) shows it is available.

[michalleptuch]

I would like to update my .NET apps to the newest .NET Core and then use WindowsAppSDK and XAML Islands but the future for XAML Islands is unclear. I see that MS team want to focus on XAML Islands only for C++ 😞

[ojhad]

@bpulliam is there documentation you can point to for Xaml Islands?

[DeveloperInUK]

Hi, could anyone give me an update on using Xaml island with WinUI3 please? We have an old MFC based application and would like to update it to use WinUI3. If it is already available to use, could you let me know the web page explaining how to use it (i.e. example code) please? If it is not available, could you let me know when it will be available please?