PreviewKeyDown Event
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ContentElement.PreviewKeyDown Event


Occurs when a key is pressed while the keyboard is focused on this element.

Namespace:   System.Windows
Assembly:  PresentationCore (in PresentationCore.dll)

public event KeyEventHandler PreviewKeyDown

Key handling interacts with other platform features such as commanding and text composition. The KeyDown event is a lower-level text input event that might not behave as expected on certain controls. This is because some controls have control compositing or class handling that provides a higher-level version of text input handling and related events.

This event creates an alias for the Keyboard.PreviewKeyDown attached event for this class, so that PreviewKeyDown is part of the class members list when ContentElement is inherited as a base element. Event handlers that are attached to the PreviewKeyDown event are attached to the underlying Keyboard.PreviewKeyDown attached event and receive the same event data instance.

Identifier field


Routing strategy




  • The corresponding bubbling event is KeyDown.

  • Override OnPreviewKeyDown to implement class handling for this event in derived classes.

.NET Framework
Available since 3.0
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