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UIElement::PreviewMouseDown Event

Occurs when any mouse button is pressed while the pointer is over this element.

Namespace:  System.Windows
Assembly:  PresentationCore (in PresentationCore.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

public:
 event MouseButtonEventHandler^ PreviewMouseDown {
	void add (MouseButtonEventHandler^ value);
	void remove (MouseButtonEventHandler^ value);
}
<object PreviewMouseDown="MouseButtonEventHandler" .../>

Identifier field

PreviewMouseDownEvent

Routing strategy

Tunneling

Delegate

MouseButtonEventHandler

  • The corresponding bubbling event is MouseDown.

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

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

The PreviewMouseDown event is often raised together with either PreviewMouseLeftButtonDown or PreviewMouseRightButtonDown, which correspond to a press of one of the two standard mouse buttons. PreviewMouseLeftButtonDown and PreviewMouseRightButtonDown are also routed events, but they are direct routed events, and the appropriate button-specific event is raised when the Mouse::PreviewMouseDown event reaches this element along the event route. See Remarks for PreviewMouseLeftButtonDown or PreviewMouseRightButtonDown.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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