SizeChangedEventArgs Class

Definition

Namespace:: Windows.UI.Xaml

Edit

Provides data related to the FrameworkElement.SizeChanged event.

Equivalent WinUI class: Microsoft.UI.Xaml.SizeChangedEventArgs.

public ref class SizeChangedEventArgs sealed : RoutedEventArgs

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.Foundation.Metadata.WebHostHidden]
class SizeChangedEventArgs sealed : RoutedEventArgs

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.Foundation.Metadata.WebHostHidden]
public sealed class SizeChangedEventArgs : RoutedEventArgs

Public NotInheritable Class SizeChangedEventArgs
Inherits RoutedEventArgs

Inheritance: Object

RoutedEventArgs
SizeChangedEventArgs

Attributes: ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute WebHostHiddenAttribute

Windows 10 requirements

Device family	Windows 10 (introduced in 10.0.10240.0)
API contract	Windows.Foundation.UniversalApiContract (introduced in v1.0)

Remarks

The PreviousSize value is based on ActualHeight and ActualWidth values on the element before the layout change that motivated the SizeChanged event. The NewSize value is based on the ActualHeight and ActualWidth values after the layout change is processed.

There's another event named SizeChanged that's defined by the Window class. Event handlers for Window.SizeChanged use the WindowSizeChangedEventArgs class for data. Window.SizeChanged can occur in some of the same circumstances that FrameworkElement.SizeChanged occurs; for more info, see FrameworkElement.SizeChanged.

Properties

NewSize

Gets the new size of the object reporting the size change.

Equivalent WinUI property: Microsoft.UI.Xaml.SizeChangedEventArgs.NewSize.

OriginalSource

Gets a reference to the object that raised the event. This is often a template part of a control rather than an element that was declared in your app UI.

Equivalent WinUI property: Microsoft.UI.Xaml.RoutedEventArgs.OriginalSource.

(Inherited from RoutedEventArgs)

PreviousSize

Gets the previous size of the object reporting the size change.

Equivalent WinUI property: Microsoft.UI.Xaml.SizeChangedEventArgs.PreviousSize.

Applies to