[Windows] Fixed : Switch control default width issue

src/Controls/tests/TestCases.HostApp/Issues/Issue28901.cs

@@ -0,0 +1,49 @@
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 28901, "[Windows] Switch control is not sizing properly", PlatformAffected.UWP)]
+public class Issue28901 : ContentPage
+{
+	public Issue28901()
+	{
+		var switchControl = new Switch
+		{
+			IsToggled = true,
+			HorizontalOptions = LayoutOptions.End,
+			AutomationId = "SwitchControl"
+		};
+
+		var switchControl2 = new Switch();
+
+		var label = new Label
+		{
+			Text = "Switch Control",
+			VerticalOptions = LayoutOptions.Center,
+		};
+
+		var settingsLabel = new Label
+		{
+			Text = "Change View",
+			VerticalOptions = LayoutOptions.Center,
+		};
+
+		var horizontalStackLayout = new HorizontalStackLayout
+		{
+			Children =
+			{
+				label,
+				switchControl2,
+				settingsLabel
+			},
+		};
+
+		Content = new VerticalStackLayout
+		{
+			VerticalOptions = LayoutOptions.Center,
+			Children =
+			{
+				switchControl,
+				horizontalStackLayout,
+			}
+		};
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue28901.cs

@@ -0,0 +1,22 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+
+public class Issue28901 : _IssuesUITest
+{
+	public override string Issue => "[Windows] Switch control is not sizing properly";
+
+	public Issue28901(TestDevice device)
+	: base(device)
+	{ }
+
+	[Test]
+	[Category(UITestCategories.Switch)]
+	public void VerifySwitchControlSize()
+	{
+		App.WaitForElement("SwitchControl");
+		VerifyScreenshot();
+	}
+}

src/Core/src/Handlers/Switch/SwitchHandler.Windows.cs

@@ -15,31 +15,71 @@ public static void MapIsOn(ISwitchHandler handler, ISwitch view)
 		public static void MapTrackColor(ISwitchHandler handler, ISwitch view)
 		{
 			if (handler is SwitchHandler)
+			{
 				handler.PlatformView?.UpdateTrackColor(view);
+			}
 		}
 
 		public static void MapThumbColor(ISwitchHandler handler, ISwitch view)
 		{
 			if (handler is SwitchHandler)
+			{
 				handler.PlatformView?.UpdateThumbColor(view);
+			}
 		}
 
 		protected override void DisconnectHandler(ToggleSwitch platformView)
 		{
 			base.DisconnectHandler(platformView);
 			platformView.Toggled -= OnToggled;
+			platformView.Loaded -= OnLoaded;
 		}
 
 		protected override void ConnectHandler(ToggleSwitch platformView)
 		{
 			base.ConnectHandler(platformView);
 			platformView.Toggled += OnToggled;
+			platformView.Loaded += OnLoaded;
+		}
+
+		void OnLoaded(object sender, UI.Xaml.RoutedEventArgs e)
+		{
+			var toggleSwitch = (ToggleSwitch)sender;
+
+			if (toggleSwitch is null)
+			{
+				return;
+			}
+
+			var rootGrid = toggleSwitch.GetDescendantByName<Grid>("SwitchAreaGrid")?.Parent as Grid;
+			if (rootGrid is not null && rootGrid.ColumnDefinitions.Count > 0)
+			{
+				// In the default ToggleSwitch template, the second column (index 1) is only used for spacing 
+				// between the toggle knob and the On/Off content area (which is defined in the third column).
+				// Since MAUI does not support OnContent/OffContent, this spacing is unnecessary
+				// so we set its width to 0 to reduce unwanted layout padding.
+				rootGrid.ColumnDefinitions[1].Width = new UI.Xaml.GridLength(0);
+			}
+		}
+
+		// TODO: Make it public in .NET 10.0
+		internal static void MapSwitchMinimumWidth(IViewHandler handler, IView view)
+		{
+			// Update the native ToggleSwitch MinWidth to reflect the MAUI view's MinimumWidth,
+			// overriding the default WinUI MinWidth (154) since we're not supporting OnContent and OffContent.
+			// This ensures the control does not reserve unnecessary space for labels.
+			if (view is ISwitch switchView && handler is SwitchHandler switchHandler)
+			{
+				switchHandler.PlatformView?.UpdateMinWidth(switchView);
+			}
 		}
 
 		void OnToggled(object sender, UI.Xaml.RoutedEventArgs e)
 		{
 			if (VirtualView is null || PlatformView is null || VirtualView.IsOn == PlatformView.IsOn)
+			{
 				return;
+			}
 
 			VirtualView.IsOn = PlatformView.IsOn;
 		}

src/Core/src/Handlers/Switch/SwitchHandler.cs

@@ -20,6 +20,9 @@ public partial class SwitchHandler : ISwitchHandler
 			[nameof(ISwitch.IsOn)] = MapIsOn,
 			[nameof(ISwitch.ThumbColor)] = MapThumbColor,
 			[nameof(ISwitch.TrackColor)] = MapTrackColor,
+#if WINDOWS
+			[nameof(IView.MinimumWidth)] = MapSwitchMinimumWidth,
+#endif
 		};
 
 		public static CommandMapper<ISwitch, ISwitchHandler> CommandMapper = new(ViewCommandMapper)

src/Core/src/Platform/Windows/SwitchExtensions.cs

@@ -91,5 +91,18 @@ public static void UpdateThumbColor(this ToggleSwitch toggleSwitch, ISwitch view
 					"ToggleSwitchKnobFillOffDisabled");
 			}
 		}
+
+		internal static void UpdateMinWidth(this ToggleSwitch toggleSwitch, ISwitch view)
+		{
+			double minWidth = view.MinimumWidth;
+			if (double.IsNaN(minWidth))
+			{
+				toggleSwitch.MinWidth = 0;
+			}
+			else
+			{
+				toggleSwitch.MinWidth = minWidth;
+			}
+		}
 	}
 }