[Windows] EmptyViewTemplate not displayed when ItemsSource is set to Null

[NafeelaNazhir]

Description

In a .NET MAUI application, when using a CollectionView with an ItemsSource initially set to a list, the EmptyViewTemplate is not displayed when the ItemsSource is subsequently set to Null. Additionally, if the ItemsSource is initially set to null, the EmptyViewTemplate is also not displayed.

Note: For EmptyView

• When EmptyView is selected first and then ItemsSource is selected, the EmptyView is not displayed.

• When ItemsSource is selected first and then EmptyView is selected, the EmptyView is displayed correctly.

Screen.Recording.2025-03-12.110135.mp4

Steps to Reproduce

1. Launch the application on Windows CollectionViewSample.zip
2. Tap the EmptyView/EmptyViewTemplate button to navigate to the CollectionView Control Page.
3. Tap the Options toolbar item to navigate to the Options Page, then select ItemsSource and EmptyViewTemplate.
4. Observe that the EmptyViewTemplate is not displayed.

Expected Behavior: The EmptyViewTemplate should be displayed when the ItemsSource is set to None, regardless of the initial state of the ItemsSource.

Actual Behavior: The EmptyViewTemplate is not displayed when the ItemsSource is initially set to a list and then changed to None.

Link to public reproduction project repository

No response

Version with bug

9.0.40 SR4

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

No response

Affected platforms

Windows

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

[similar-issues-ai]

We've found some similar issues:

• [Windows] [Scenario Day] EmptyView using Template displayed at the same time as the content #7150 , similarity score: 83%
• [Windows] [Scenario Day] CollectionView EmptyView using View not appear #7151 , similarity score: 82%
• [Windows] CollectionView.EmptyView can not be removed by setting it to Null #18657 , similarity score: 81%

If any of the above are duplicates, please consider closing this issue out and adding additional context in the original issue.

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[Zhanglirong-Winnie]

This issue has been verified Visual Studio 17.14 Preview 1.1(9.0.40 & 9.0.30). Can repro this issue on Windows platform.