How to generate the Channel URI for WinUI3 applications?

Rohan Pande 375

Hi, I have an WinUI3 unpackaged application without using XAML files project (Windows Subsystem). I am trying to bring Windows Notification Service (WNS)for my project. The sample project of Microsoft provided below works properly and generates the Channel URI. But I am not able to do the same on my project.

Reference: https://github.com/microsoft/WindowsAppSDK-Samples/blob/main/Samples/Notifications/Push/cpp-console-unpackaged/cpp-console-unpackaged.cpp

Junjie Zhu - MSFT 16,391 Reputation points Microsoft Vendor

2024-02-14T08:05:51.0966667+00:00

Hi @Rohan Pande ,

Thanks for sharing the example, this is an unexpected behavior.

So now you generate a static library(WinUI3Lib) first and then call PushNotifications?

I can't confirm the problem just from the code, maybe you can test calling RequestChannelAsync directly like a normal winui3 app instead of calling it from the static library.
Rohan Pande 375 Reputation points

2024-02-16T09:28:56.7166667+00:00

We got the issue. In the project that I have shared with you, we were calling init_apartment which we are setting to single threaded and as its single threaded Creating Channel URI was on async call which was on some other OS thread due to which this error was happening.

After switching to another thread before invoking the CreateChannelAsync call made me generate the Channel URI.
Junjie Zhu - MSFT 16,391 Reputation points Microsoft Vendor

2024-02-19T07:56:14.69+00:00

Hi @Rohan Pande ,
Glad to hear that! So, the problem is solved now?
Rohan Pande 375 Reputation points

2024-02-19T08:51:58.8433333+00:00

Yeah it's solved. Thanks for the help...
Rohan Pande 375 Reputation points

2024-02-19T09:00:09.8566667+00:00

This resolves for WinUI3 application. We are also trying the same for native/WinUI2 applications where Windows App SDK is not present. The alternative solution is to use the UWP APIs. To get the Channel URI we need to register our app in Windows Store. But for that we need to be a packaged app is what I found in document aren't there any alternatives for unpackaged apps?

Reference: https://video2.skills-academy.com/en-us/windows/apps/design/shell/tiles-and-notifications/windows-push-notification-services--wns--overview#authenticating-your-cloud-service
Rohan Pande 375 Reputation points

2024-02-21T06:35:10.3966667+00:00

Sorry found an another issue Can you please help? @Junjie Zhu - MSFT

I am not sure why it isn't working in my project. I was able to get the notification while the application isn't working but when the application is working it is creating another application and gets crashed.

Apologies...
Rohan Pande 375 Reputation points

2024-02-21T06:37:22.8433333+00:00

While the sample application of Microsoft when we send a push notification it launches the same exe but for my application it is launching a different exe with different process.
Rohan Pande 375 Reputation points

2024-02-21T06:53:30.6866667+00:00

Sorry @Junjie Zhu - MSFT it's resolved some of my code changes has caused it.
Junjie Zhu - MSFT 16,391 Reputation points Microsoft Vendor

2024-02-21T09:32:54.23+00:00

It's okay, I'm glad your problem is solved. For the convenience of people who encounter the same problem, you can kindly share your solution in Answer. You can also do this on your question in Stack Overflow.

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How to generate the Channel URI for WinUI3 applications?