Which UWP controls can be used in XAML islands?

Michael Chourdakis 66

Some of them work nicely.

Button, StackPanel, TextBlock, CheckBox, OK.

Some of them do not work, they simply throw when their XML is loaded.
For example TeachingTip, with or without the muxc: namespace. WebView also doesn't load.

When using XamlReader::Load to load this, it throws {value=0x802b000a } winrt::hresult E_XAMLPARSEFAILED:XAML parsing failed.

Is there documentation to specify which would and which would not work or, is there an additional library that must be linked?

I have created a small library (https://github.com/WindowsNT/uwplib) that is used by my projects, but not everything demonstrated in the 'xaml gallery' demo would work.

Xiaopo Yang - MSFT 12,151 Reputation points Microsoft Vendor

2021-10-07T08:22:05.817+00:00

Perhaps the <WebView/> is Microsoft-extend node and According to XamlReader.Load, There are several concepts that are important to understand for example:

Any custom assemblies referenced in a XAML namespace mapping must already be available to the application

Finally, to use WebView2 in Win32 apps, There are some tips.
Michael Chourdakis 66 Reputation points

2021-10-07T11:11:17.533+00:00

The problem is not so much the webview, but other important controls like the TeachingTip, the InfoBar, the Expander etc.
Xiaopo Yang - MSFT 12,151 Reputation points Microsoft Vendor

2021-10-08T06:18:43.947+00:00

As Teaching tip and @Castorix31 said, The TeachingTip control requires the Windows UI Library. But after adding xmlns:muxc="using:Microsoft.UI.Xaml.Controls", a error,The type 'TeachingTip' was not found, was raised when testing your sample. Perhaps your project doesn‘t include Windows UI Library?
Michael Chourdakis 66 Reputation points

2021-10-08T20:41:26.413+00:00

Okay I tried including the nuget package, still same error.
Castorix31 82,751 Reputation points

2021-10-09T12:07:54.187+00:00

TeachingTip is used in a WinUI project :

A quick test :
Michael Chourdakis 66 Reputation points

2021-10-10T17:08:25.653+00:00

Thanks, I 'm trying to do it in an unpackaged project.
Supposedly I must call MddBootstrapInitialize which fails no matter how I call it - will keep trying.
Castorix31 82,751 Reputation points

2021-10-10T17:25:04.903+00:00

Unpackaged does not work either for me (Windows 10 1909)
I followed exactly all the doc : Windows App SDK deployment guide for unpackaged apps
(tested in C++ or C#)

I posted a question about this problem with all details on the dedicated forum : MddBootstrapInitialize : ERROR_NOT_FOUND

But nobody could answer atm :-(
Xiaopo Yang - MSFT 12,151 Reputation points Microsoft Vendor

2021-10-12T02:31:06.517+00:00

After changing versionTag to preview2, It succeeded with c++ x86&x64 console application. But I failed to include XamlReader.Load.....
Michael Chourdakis 66 Reputation points

2021-10-12T05:19:58.5+00:00

Mine doesn't show anything installed in get-appxpackage appruntime
Xiaopo Yang - MSFT 12,151 Reputation points Microsoft Vendor

2021-10-12T07:35:41.267+00:00

Do you install the latest Windows App SDK installer and MSIX packages?
Castorix31 82,751 Reputation points

2021-10-12T07:57:22.217+00:00

I installed all successive versions and it still does not work

In a Hello World C++/Win32 app (same thing in C# with the Demo app they posted : scratch ):
Xiaopo Yang - MSFT 12,151 Reputation points Microsoft Vendor

2021-10-12T09:48:07.157+00:00

Perhaps You should set versionTag to experimental1 depending on installed runtime.
Castorix31 82,751 Reputation points

2021-10-12T10:43:47.173+00:00

No, "experimental1" was the previous version I installed and I also get : ERROR_NOT_FOUND
The first 0.8 "preview" version did not work either
Michael Chourdakis 66 Reputation points

2021-10-12T15:40:37.413+00:00

Okay I installed the runtime and it's initialized correctly, but still no InfoBox, no TeachingTip etc.

Castorix31 82,751

If I could use TeachingTip in a packaged project, I think it should work in an unpackaged one (that I cannot test atm... I will try to uninstall/re-install the runtime)
In my test I added at beginning :

#include <winrt\Microsoft.UI.h>
#include <winrt\Microsoft.UI.Xaml.h>
#include <winrt\Microsoft.UI.Xaml.Media.h>
#include <winrt\Microsoft.UI.Xaml.Media.Imaging.h>
#include <winrt\Microsoft.UI.Xaml.Controls.h>

#include <winrt\Windows.Foundation.h>

using namespace winrt;

using namespace Microsoft::UI;
using namespace Microsoft::UI::Xaml;
using namespace Microsoft::UI::Xaml::Media;
using namespace Microsoft::UI::Xaml::Media::Imaging;
using namespace Microsoft::UI::Xaml::Controls;

using namespace Windows::Foundation;

Xiaopo Yang - MSFT 12,151 Reputation points Microsoft Vendor

2021-10-13T01:26:32.69+00:00

I have the same problem. Perhaps I should uninstall/re-install the sdk in order to use Microsoft.UI.Xaml.Controls.But I also think it should work in an unpackaged one.
Castorix31 82,751 Reputation points

2021-11-14T07:54:50.4+00:00
I just met the same problem in VB
I compared VB vs C#/C++ where TeachingTip works and the difference is in app.xaml which adds the resource :

<XamlControlsResources xmlns="using:Microsoft.UI.Xaml.Controls" />

(I also fixed the MddBootstrapInitialize problem by upgrading Windows : there was a bug in Windows 10 1909)

1 answer

Castorix31 82,751 Reputation points

2021-10-07T08:18:27.333+00:00

TeachingTip is a WinUI control (Microsoft.WindowsAppSDK package)
Webview is a bit different as explained at XAML Islands
I had tested it with Microsoft.Toolkit.Forms.UI.Controls (replaced by WebView2 now)
(I could create it with XAML Islands, but it crashed then...)
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Which UWP controls can be used in XAML islands?

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