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UIElement.BeginAnimation Method (DependencyProperty, AnimationTimeline)

Starts an animation for a specified animated property on this element.

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

'Declaration
Public Sub BeginAnimation ( _
	dp As DependencyProperty, _
	animation As AnimationTimeline _
)

Parameters

dp
Type: System.Windows.DependencyProperty

The property to animate, which is specified as a dependency property identifier.

animation
Type: System.Windows.Media.Animation.AnimationTimeline

The timeline of the animation to start.

Implements

IAnimatable.BeginAnimation(DependencyProperty, AnimationTimeline)

When you check whether a property is animated, note that the animation will begin and be considered animated when the first frame beyond the non-animated starting point is rendered.

If the BeginTime for animation is Nothing, then any current animations are removed and the current value of the property is held.

If the entire animation value is Nothing, all animations are removed from the property and the property value reverts to its base value. However, the originally associated animation timeline is not stopped. Any other animations assigned to that timeline will continue to run.

The following example creates an animation, assigns it, and then calls BeginAnimation to start it.

			' Animate the button's width.
			Dim widthAnimation As New DoubleAnimation(120, 300, TimeSpan.FromSeconds(5))
			widthAnimation.RepeatBehavior = RepeatBehavior.Forever
			widthAnimation.AutoReverse = True
			animatedButton.BeginAnimation(Button.WidthProperty, widthAnimation)

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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