XAML ContentPage.Content required for data to appear.

[StewBash]

Description

During testing I was having a problem with data not showing in a very simple CollectionView. After a few attempts I discovered that if the XAML <ContentPage.Content> section is a any StackLayout. The data will not appear in the bound collectoin view.

Per the MS instructions:

The Content property isn't required in XAML because elements defined for use in .NET MAUI XAML are allowed to have one property specified as the ContentProperty attribute on the class:

Steps to Reproduce

New Project... Place a CollectionView inside of any stack layout that is the primary content element. Bind the collection view ItemsSource property to a class and the contents will not show, despite having several items in the source.

Link to public reproduction project repository

No response

Version with bug

8.0.3 GA

Is this a regression from previous behavior?

Yes, this used to work in Xamarin.Forms

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

No response

Did you find any workaround?

Use ContentPage.Content and it appear to no longer have issues.

Relevant log output

No response

[jfversluis]

Can you please provide some code to demonstrate what you mean? I don't think this has to do with having to specify the Content property, but more with wrapping a CollectionView inside of a StackLayout and then the size not being updated accordingly.

For more information about layouts, please see: https://github.com/dotnet/maui/blob/main/docs/design/layout.md

[dotnet-policy-service[bot]]

Hi @StewBash. We have added the "s/needs-info" label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[dotnet-policy-service[bot]]

This issue has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for 4 days. It will be closed if no further activity occurs within 3 days of this comment. If it is closed, feel free to comment when you are able to provide the additional information and we will re-investigate.

[dotnet-policy-service[bot]]

This issue has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for 4 days. It will be closed if no further activity occurs within 3 days of this comment. If it is closed, feel free to comment when you are able to provide the additional information and we will re-investigate.