Dynamic resources are not applied issue for the layouts in .NET MAUI

[Priyadharshini-Periyasamy]

Description

When attempting to use dynamic resource binding to set properties of a layout that is a child of the ContentView, an issue arises. The problem is that the parent reference of the layout becomes null.

Below code snippet is used to reproduce the issue.

Code

public class DemoClass : View, IContentView, IVisualTreeElement
{
    private Grid grid;

    public DemoClass()
   {
        this.grid = new Grid();
        Label label = new Label();
        label.VerticalOptions = LayoutOptions.Center;
        label.HorizontalOptions = LayoutOptions.Center;
        label.Text = "Dynamic resource";
        label.SetDynamicResource(Label.TextColorProperty, "SomeColor");
        this.grid.Children.Add(label);
        this.grid.parent = this;
    }

    object IContentView.Content
    {
        get
        {
            return grid;
        }
    }

    IView IContentView.PresentedContent
    {
        get
        {
            return grid;
        }
    }

    IReadOnlyList<IVisualTreeElement> IVisualTreeElement.GetVisualChildren()
    {
        if (this.grid != null)
        {
            return new List<IVisualTreeElement>() { grid };
        }

        return new List<IVisualTreeElement>();
    }

    /// <summary>
    /// Gets the content padding.
    /// </summary>
    Thickness IPadding.Padding
    {
        get
        {
            return new Thickness(0);
        }
    }

    public Size CrossPlatformArrange(Rect bounds)
    {
        this.ArrangeContent(bounds);
        return bounds.Size;
    }

    public Size CrossPlatformMeasure(double widthConstraint, double heightConstraint)
    {
        return this.MeasureContent(widthConstraint, heightConstraint);
    }
}

[GaugeDynamicBinding.zip](https://github.com/dotnet/maui/files/12124858/GaugeDynamicBinding.zip)

Steps to Reproduce

1 Create an instance of the DemoClass in the application. 2. Use the DemoClass instance to set up a ContentView that contains the child layout, e.g., a Grid. 3. Attempt to apply dynamic resource binding on properties of the child layout (e.g., Grid) from within the DemoClass.

Link to public reproduction project repository

GaugeDynamicBinding.zip

Version with bug

7.0.49

Last version that worked well

Unknown/Other

Affected platforms

Windows

Affected platform versions

Windows : Windows 10 Enterprise 10.0.19044

Did you find any workaround?

No response

Relevant log output

No response

[ghost]

We've added this issue to our backlog, and we will work to address it as time and resources allow. If you have any additional information or questions about this issue, please leave a comment. For additional info about issue management, please read our Triage Process.

[PureWeen]

The code here might help you out in NET8 https://github.com/dotnet/maui/pull/16046

[jaosnz-rep]

Verified this issue with Visual Studio Enterprise 17.9.0 Preview 3. Can repro on .NET 7/.NET 8 Android platforms with sample project. DynamicResourceSample.zip