Why does SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility cause

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Why does SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility cause

Hong 1,526

SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Collapsed;

The above code worked fine for a UWP app. After I migrated the app to WinUI, it throws:

System.AccessViolationException
  HResult=0x80004003
  Message=Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
  Source=<Cannot evaluate the exception source>
  StackTrace:
<Cannot evaluate the exception stack trace>

Could anyone shed some light on this?

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Answer 1

Junjie Zhu - MSFT 21,746

Hi @Hong ,

Welcome to Microsoft Q&A!

The class Windows.UI.Core.SystemNavigationManager is not support in WinUI3 project.

It is recommended that you use Microsoft.UI.Xaml.Controls.NavigationView in your WinUI3 project.

Thank you.

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Hong 1,526 Reputation points

2023-11-20T13:48:02.06+00:00

Thank you for the answer.
Hong 1,526 Reputation points

2023-11-20T22:48:38.71+00:00

Could you tell me how to obtain the current NavigationView?
Junjie Zhu - MSFT 21,746 Reputation points

2023-11-21T01:29:06.8766667+00:00

There is no SystemNavigationView in WinUI3 project, It is recommended that you add the control NavigationView in Winui3 and obtain the NavigationView through x:name .
Hong 1,526 Reputation points

2023-11-21T02:12:10.04+00:00

Thank you. I was trying to remove the back button. It seems that apps do not have the back button on the title bar anymore.

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Why does SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility cause

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