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UIElement.PreviewTouchDown Event

Occurs when a finger touches the screen while the finger 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

'Declaration
Public Event PreviewTouchDown As EventHandler(Of TouchEventArgs)
<object PreviewTouchDown="EventHandler<TouchEventArgs>" .../>

Identifier field

PreviewTouchDownEvent

Routing strategy

Tunneling

Delegate

EventHandler(Of TEventArgs) of type TouchEventArgs.

  • The corresponding bubbling event is TouchDown.

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

By default, the PreviewTouchDown and TouchDown events do not occur until a finger touches the screen and moves. Pressing a finger on the screen and holding it without moving it causes the press and hold behavior of a Stylus. The press and hold behavior is equivalent to a mouse right-click.

To cause the PreviewTouchDown and TouchDown events to occur as soon as a finger touches the screen, set the Stylus.IsPressAndHoldEnabled attached property to false for this element.

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4
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