where are the nuget packages coming from ? they don't get pulled in my solution.

ITNOA

I think it is very good to add sample for WinUI 3 with GeneticHost (default WinUI3 template in Visual Studio using GenericHost) and EntityFramework Core (that shows migrations and etc.)

You can share an inventory demo app with win UI3 desktop mvvm similar to the uwp sample you did 4 years ago ?

Hello,

i'm having an error during debug x64 compilation with Visual Studio 2022 and WindowsAppSDK 1.0.
This is the error from the output:
1>------ Build started: Project: ContosoAirlinePOSCpp (Package), Configuration: Debug x64 ------
1>DUMPPRIFILETODETAILEDXML : error : PRI175: 0x80070003 - Dump
1>DUMPPRIFILETODETAILEDXML : error : PRI175: 0x80070003 - MakePri failed with error: impossible to find path specified.
1>DUMPPRIFILETODETAILEDXML : error : PRI222: 0x80070003 - Unspecified error occurred.
1>Done building project "ContosoAirlinePOSCpp (Package).wapproj" -- FAILED.

Can you help me?

I have few issues with the ContosoAirlinePOSCpp sample:

• I was not able to compile because I could not found SDL2_image.lib to link. SDL2 libs are missing from this repo in the ContosoAirlinePOS\ContosoAirlinePOSCpp\ContosoSeatBooking\SDL2-devel-2.0.12-VC\SDL2-2.0.12 folder. I downloaded SDL2 libs from SDL2 website, but SDL2_image.lib does not exist.
• I commented out the IMG_Init calls and I was able to compile
• when starting, the application crashes at line 260 of winrt\Microsoft.UI.Xaml.h.
  This is the call stack and this is the log output log.txt

>	ContosoAirlinePOSCpp_x64d.exe!winrt::impl::consume_Microsoft_UI_Xaml_IApplicationStatics<winrt::Microsoft::UI::Xaml::IApplicationStatics>::Start(const winrt::Microsoft::UI::Xaml::ApplicationInitializationCallback & callback) Line 260	C++
 	ContosoAirlinePOSCpp_x64d.exe!winrt::Microsoft::UI::Xaml::Application::Start::__l2::<lambda>(const winrt::Microsoft::UI::Xaml::IApplicationStatics & f) Line 12900	C++
 	ContosoAirlinePOSCpp_x64d.exe!winrt::impl::factory_cache_entry<winrt::Microsoft::UI::Xaml::Application,winrt::Microsoft::UI::Xaml::IApplicationStatics>::call<void <lambda>(const winrt::Microsoft::UI::Xaml::IApplicationStatics &) &>(winrt::Microsoft::UI::Xaml::Application::Start::__l2::void <lambda>(const winrt::Microsoft::UI::Xaml::IApplicationStatics &) & callback) Line 6084	C++
 	ContosoAirlinePOSCpp_x64d.exe!winrt::impl::call_factory<winrt::Microsoft::UI::Xaml::Application,winrt::Microsoft::UI::Xaml::IApplicationStatics,void <lambda>(const winrt::Microsoft::UI::Xaml::IApplicationStatics &)>(winrt::Microsoft::UI::Xaml::Application::Start::__l2::void <lambda>(const winrt::Microsoft::UI::Xaml::IApplicationStatics &) && callback) Line 6107	C++
 	ContosoAirlinePOSCpp_x64d.exe!winrt::Microsoft::UI::Xaml::Application::Start(const winrt::Microsoft::UI::Xaml::ApplicationInitializationCallback & callback) Line 12901	C++

The DemoBuildCpp project has the same error.
I am able to run an app created with the Blank App, Packaged (WinUI in Desktop) C++ template, installed with the WinUI.ProjectTemplates.vsix
I am using VS2019 16.9.0 Preview 4.0 and Windows10 Pro 21H1 Build 19043.844

Changing PC to a VS2019 16.10.0 Preview 1.0 and Windows10 LTSC 1809 Build 17763.1817 now I get the error:
WinRT originate error - 0x80004005 : 'Cannot locate resource from 'ms-appx:///Microsoft.UI.Xaml/Themes/themeresources.xaml'.'.
with this call stack

>	ContosoAirlinePOSCpp.exe!winrt::Windows::Foundation::IActivationFactory::ActivateInstance<winrt::Microsoft::UI::Xaml::Controls::XamlControlsResources>() Line 6236	C++
 	ContosoAirlinePOSCpp.exe!winrt::Microsoft::UI::Xaml::Controls::XamlControlsResources::<lambda>(const winrt::Windows::Foundation::IActivationFactory & f) Line 69080	C++
 	ContosoAirlinePOSCpp.exe!winrt::Microsoft::UI::Xaml::Controls::XamlControlsResources <lambda>(const winrt::Windows::Foundation::IActivationFactory &)::<lambda_invoker_cdecl>(const winrt::Windows::Foundation::IActivationFactory & f) Line 69080	C++
 	ContosoAirlinePOSCpp.exe!winrt::impl::factory_cache_entry<winrt::Microsoft::UI::Xaml::Controls::XamlControlsResources,winrt::Windows::Foundation::IActivationFactory>::call<winrt::Microsoft::UI::Xaml::Controls::XamlControlsResources (__cdecl*)(winrt::Windows::Foundation::IActivationFactory const &)>(winrt::Microsoft::UI::Xaml::Controls::XamlControlsResources(*)(const winrt::Windows::Foundation::IActivationFactory &) && callback) Line 6084	C++
 	ContosoAirlinePOSCpp.exe!winrt::impl::call_factory_cast<winrt::Microsoft::UI::Xaml::Controls::XamlControlsResources (__cdecl*)(winrt::Windows::Foundation::IActivationFactory const &),winrt::Microsoft::UI::Xaml::Controls::XamlControlsResources,winrt::Windows::Foundation::IActivationFactory,winrt::Microsoft::UI::Xaml::Controls::XamlControlsResources <lambda>(const winrt::Windows::Foundation::IActivationFactory &)>(winrt::Microsoft::UI::Xaml::Controls::XamlControlsResources::winrt::Microsoft::UI::Xaml::Controls::XamlControlsResources <lambda>(const winrt::Windows::Foundation::IActivationFactory &) && callback) Line 6123	C++
 	ContosoAirlinePOSCpp.exe!winrt::Microsoft::UI::Xaml::Controls::XamlControlsResources::XamlControlsResources() Line 69082	C++
 	[External Code]	
 	ContosoAirlinePOSCpp.exe!winrt::impl::produce<winrt::ContosoAirlinePOSCpp::implementation::XamlUserType,winrt::Microsoft::UI::Xaml::Markup::IXamlType>::ActivateInstance(void * * result) Line 1003	C++
 	[External Code]	
 	ContosoAirlinePOSCpp.exe!winrt::impl::consume_Microsoft_UI_Xaml_IApplicationStatics<winrt::Microsoft::UI::Xaml::IApplicationStatics>::Start(const winrt::Microsoft::UI::Xaml::ApplicationInitializationCallback & callback) Line 260	C++

Instead the DemoBuildCpp project starts.

Please update the source code to Windows App SDK 0.8 .
Too little C++ demo code can be found about Windows App SDK 0.8.

Describe the bug

When running on Version 1809 / Debug x64, SortingItemsWinUI3Demo throws an exception - see screenshot below. In addition to the exception, I will get strange windowing behavior afterwards when I try to view/maximize any windows I currently have open, they will not appear or maximize. To alleviate this, I have been forced to lock/log out/restart my computer.

Steps to reproduce the bug

1. Open the SortingItemsWinUI3Demo in Visual Studio 2019.
2. Update the Targeting versions appropriately to match system's.
   In my case, I updated them to:
   Target version: Windows 10, version 1809 (10.0; Build 17763)
   Min version: Windows 10, version 1803 (10.0; Build 17134)
3. Build and run with Debug x64.

Screenshots

Version Info

NuGet package version:

[PInvoke.User32 0.7.78]
[Microsoft.WinUI 3.0.0-preview4.210210.4]

Targeting:
Target: Universal Windows
Target version: Windows 10, version 1809 (10.0; Build 17763)
Min version: Windows 10, version 1803 (10.0; Build 17134)

Additional context

Using Win2D instead of the current SDL-based approach for the seat selection functionality would be a nice improvement to have.

Pros:

• Shows further integration of WinUI with other modern Windows APIs.
• Makes the seat selection flow available in the C# version of the app.

Cons:

• The current approach shows the integration of WinUI with native libraries, which is a useful use case too.

Related issue: microsoft/Win2D#707

Gets "System.InvalidCastException: 'Specified cast is not valid.'" after pressing the login button.

it seems like the problem is in the BookFlightPage.xaml in the CalendarDatePicker contorl.
Binding to DateTimeOffset pops up this error.

The folder
https://github.com/microsoft/WinUI-3-Demos/tree/master/src/ContosoAirlinePOS/ContosoAirlinePOSCpp/ContosoSeatBooking/SDL2-devel-2.0.12-VC/SDL2-2.0.12
only contains the header files, but not the (x64) binaries (for SDL + SDL image) to be able to build the C++ example.
So I would propose to either add the binaries/ use the SDL nuget package for them or add build instructions that those binaries have to be downloaded and put there.

Bug

I have followed the README instructions, built the code, and ran the application (Debug x64). However, once I click “Select Folder” in the file picker, the application crashes.

Note: I have tried to select on different folders locally with the same result. Also, I was able to get the DemoBuildCpp to run and work!

Error Message

AsyncCausalityTracer : System.InvalidCastException: Unable to cast object of type 'WinRT.IInspectable' to type 'Windows.Foundation.Diagnostics.IAsyncCausalityTracerStatics'.
at System.Threading.Tasks.AsyncCausalityTracer..cctor()
The thread 0x17494 has exited with code 0 (0x0).
Exception thrown at 0x00007FFC8017C330 (coreclr.dll) in DemoBuildCs.exe: 0xC0000005: Access violation reading location 0x0000000000000010.
The Common Language Runtime cannot stop at this exception. Common causes include: incorrect COM interop marshalling and memory corruption. To investigate further use native-only debugging.

Version Info

NuGet package version:
My installed packages are
[Microsoft.VCRTForwarders.140 v1.0.6]
[Microsoft.WinUI 3.0.0-preview1.200515.3]

Windows version: Version 1809 (OS Build 17763.1158)
Device: Desktop

According to the Prerequisites in the ReadMe Version 1.0 of the AppSDK is required (and properly installed on my machine). However, the current master (including Demo for Build 2020) requires AppSDK 1.1.0-preview3. When I accept the "install dialog" of this version only a browser opens where I can download several different versions.

Although this is probably only a small problem, it is unfortunately something I experience with nearly all stuff around WinUI3. So far I wasn't able to use one example or tutorial from Microsoft without some kind of "small fix" (which usually costs me between 1 hour and some days).

It would be really great to have something that is just working. Sorry if this Issue sounds "a little" frustrated.

Thank you for your excellent code, it is very helpful for learning how to using winui sdk.
Now i found a issue: in solution Build2020Demo\DemoBuildCs\DemoBuildCs.sln, the Close Button in ContentDialog under dark theme is not visible. The button border and button text are all black. It makes the button invisible. can you fix that? thank you.

In the cpp project, when I click on "Book Flight" from the left NavigationView and repeat the navigation, the memory usage keeps increasing.
Even if I set "CacheSize=0" in MainContentFrame of ShellPage.xaml, the result does not change.
I think there is a memory leak somewhere.

Would be nice to see the ContosoAirline code demonstrated here in this repo: https://www.youtube.com/watch?v=VdBrc_ocWXo

I have tried .NET 5 Preview 5 and Preview 7) I am using Visual Studio 16.7 Preview 5 and having the following problem with the DemobuildCs application.
I keep getting the exception:-
System.MissingMethodException: 'Method not found: 'Void System.Runtime.InteropServices.ComWrappers.RegisterAsGlobalInstance()'.'

I saw that there might be a problem with Preview 7 which is why I downgraded to Preview 5 but still have the same problem.

Could you provide a demo app for integrating with In-app purchase support?

Thank you for adding the execution alias to your demo. Unfortunately I don't see how I can access the command line arguments after the alias.

I'm getting a StackOverflowException when I try to toggle the SelectedItem of the ItemSource for Class and Stops. Is that a WinUI3 Preview3 known issue?

System.StackOverflowException
HResult=0x800703E9

Exception thrown at 0x00007FFE9EB93908 (coreclr.dll) in ContosoAirlinePOSCs.exe: 0xC00000FD: Stack overflow (parameters: 0x0000000000000001, 0x00000022F4C05000).
The Common Language Runtime cannot stop at this exception. Common causes include: incorrect COM interop marshalling and memory corruption. To investigate further use native-only debugging.
An unhandled exception of type 'System.StackOverflowException' occurred in WinRT.Runtime.dll