Binding Border.StrokeShape stopped working - fix

src/Controls/src/Core/Border/Border.cs

@@ -308,13 +308,11 @@ protected override void OnPropertyChanged([CallerMemberName] string? propertyNam
 			base.OnPropertyChanged(propertyName);
 
 			if (propertyName == HeightProperty.PropertyName ||
+				propertyName == StrokeThicknessProperty.PropertyName ||
+				propertyName == StrokeShapeProperty.PropertyName ||
 				propertyName == WidthProperty.PropertyName)
 			{
 				Handler?.UpdateValue(nameof(IBorderStroke.Shape));
-			}
-			else if (propertyName == StrokeThicknessProperty.PropertyName ||
-					 propertyName == StrokeShapeProperty.PropertyName)
-			{
 				UpdateStrokeShape();
 			}
 			else if (propertyName == StrokeDashArrayProperty.PropertyName)

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue22549.cs

@@ -0,0 +1,27 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue22549 : _IssuesUITest
+	{
+		public Issue22549(TestDevice device) : base(device) { }
+
+		public override string Issue => "Binding Border.StrokeShape not working";
+
+		[Test]
+		public void BindingOnStrokeShapeShouldWork()
+		{
+			App.WaitForElement("button");
+
+			//Border should have radius
+			VerifyScreenshot();
+
+			App.Click("button");
+
+			//The test passes if border radius is equal to 0
+			VerifyScreenshot();
+		}
+	}
+}

src/Controls/tests/TestCases/Issues/Issue22549.xaml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="Maui.Controls.Sample.Issues.Issue22549"
+             xmlns:local="clr-namespace:Maui.Controls.Sample.Issues"
+             Title="Issue22549">
+    <VerticalStackLayout Padding="30,0" Spacing="25">
+      <Border x:Name="myBorder"
+              Margin="0,10,0,0"
+              BackgroundColor="Blue"
+              StrokeShape="{Binding Source={RelativeSource AncestorType={x:Type local:Issue22549ViewModel}}, Path=RoundedRect}">
+        <Label Text="Welcome to &#10;.NET Multi-platform App UI"
+               TextColor="White" />
+      </Border>
+      <Button AutomationId="button"
+              Text="Click me"
+              Clicked="Button_Clicked" />
+    </VerticalStackLayout>
+</ContentPage>

src/Controls/tests/TestCases/Issues/Issue22549.xaml.cs

@@ -0,0 +1,44 @@
+using Microsoft.Maui;
+using Microsoft.Maui.Controls;
+using Microsoft.Maui.Controls.Shapes;
+using Microsoft.Maui.Controls.Xaml;
+
+namespace Maui.Controls.Sample.Issues;
+
+[XamlCompilation(XamlCompilationOptions.Compile)]
+[Issue(IssueTracker.Github, 22549, "Binding Border.StrokeShape not working", PlatformAffected.All)]
+
+public partial class Issue22549 : ContentPage
+{
+	Issue22549ViewModel _viewModel;
+
+	public Issue22549()
+	{
+		InitializeComponent();
+		BindingContext = _viewModel = new Issue22549ViewModel();
+	}
+
+	void Button_Clicked(System.Object sender, System.EventArgs e)
+	{
+		_viewModel.RoundedRect.CornerRadius = new CornerRadius(0);
+	}
+}
+
+public class Issue22549ViewModel : BindableObject
+{
+	private RoundRectangle _roundedRect;
+	public RoundRectangle RoundedRect
+	{
+		get => _roundedRect;
+		set
+		{
+			_roundedRect = value;
+			OnPropertyChanged();
+		}
+	}
+
+	public Issue22549ViewModel()
+	{
+		RoundedRect = new RoundRectangle() { CornerRadius = new CornerRadius(10) };
+	}
+}

src/Controls/tests/Xaml.UnitTests/Border.xaml

@@ -1,7 +1,8 @@
-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0" encoding="UTF-8"?>
 <ContentPage 
     xmlns="http://schemas.microsoft.com/dotnet/2021/maui" 
-    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" 
+    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+    xmlns:local="clr-namespace:Microsoft.Maui.Controls.Xaml.UnitTests"
     x:Class="Microsoft.Maui.Controls.Xaml.UnitTests.Border">
     <StackLayout>
         <Border 
@@ -22,5 +23,7 @@
             <Label 
                 Text="Ellipse"/>
         </Border>
+         <Border x:Name="BorderWithBinding"
+              StrokeShape="{Binding Source={RelativeSource AncestorType={x:Type local:BorderViewModel}}, Path=RoundedRect}"/>
     </StackLayout>
 </ContentPage>

src/Controls/tests/Xaml.UnitTests/Border.xaml.cs

@@ -1,4 +1,9 @@
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
 using Microsoft.Maui.Controls.Core.UnitTests;
+using Microsoft.Maui.Controls.Shapes;
+using Microsoft.Maui.Dispatching;
+using Microsoft.Maui.UnitTests;
 using NUnit.Framework;
 
 namespace Microsoft.Maui.Controls.Xaml.UnitTests
@@ -24,6 +29,46 @@ public void InitializeStrokeShape(bool useCompiledXaml)
 				Assert.NotNull(layout.Border1.StrokeShape);
 				Assert.NotNull(layout.Border2.StrokeShape);
 			}
+
+			[TestCase(false)]
+			[TestCase(true)]
+			public void BindingToStrokeShapeWorks(bool useCompiledXaml)
+			{
+				DispatcherProvider.SetCurrent(new DispatcherProviderStub());
+				var layout = new Border(useCompiledXaml);
+
+				BorderViewModel viewModel = new();
+				layout.BindingContext = viewModel;
+				Assert.IsTrue(layout.BorderWithBinding.StrokeShape is RoundRectangle);
+				Assert.AreEqual(4, ((RoundRectangle)layout.BorderWithBinding.StrokeShape).CornerRadius.TopLeft);
+
+				viewModel.RoundedRect = new RoundRectangle() { CornerRadius = new CornerRadius(8) };
+				Assert.AreEqual(8, ((RoundRectangle)layout.BorderWithBinding.StrokeShape).CornerRadius.TopLeft);
+				DispatcherProvider.SetCurrent(null);
+			}
 		}
 	}
+
+	public class BorderViewModel : INotifyPropertyChanged
+	{
+		private RoundRectangle _roundedRect;
+		public RoundRectangle RoundedRect
+		{
+			get => _roundedRect;
+			set
+			{
+				_roundedRect = value;
+				OnPropertyChanged();
+			}
+		}
+
+		public BorderViewModel()
+		{
+			RoundedRect = new RoundRectangle() { CornerRadius = new CornerRadius(4) };
+		}
+
+		public event PropertyChangedEventHandler PropertyChanged;
+		public void OnPropertyChanged([CallerMemberName] string name = "") =>
+			PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
+	}
 }