DoubleAnimation DoubleAnimation DoubleAnimation DoubleAnimation Class


Animates the value of a Double property between two target values using linear interpolation over a specified Duration.

public : sealed class DoubleAnimation : Timeline, IDoubleAnimation
struct winrt::Windows::UI::Xaml::Media::Animation::DoubleAnimation : Timeline, IDoubleAnimation
public sealed class DoubleAnimation : Timeline, IDoubleAnimation
Public NotInheritable Class DoubleAnimation Inherits Timeline Implements IDoubleAnimation
<DoubleAnimation />
Windows 10 requirements
Device family
Windows 10 (introduced v10.0.10240.0)
API contract
Windows.Foundation.UniversalApiContract (introduced v1)


The following example shows how to use DoubleAnimation to create a rectangle that fades in and out of view after it is loaded.

        <Storyboard x:Name="myStoryboard">
          From="1.0" To="0.0" Duration="0:0:3"
          AutoReverse="True" RepeatBehavior="Forever" />

    <Rectangle Loaded="Start_Animation" x:Name="MyAnimatedRectangle"
     Width="100" Height="100" Fill="Blue" />

// Start the animation when the object loads
private void Start_Animation(object sender, RoutedEventArgs e)
' Start the animation when the object loads
Private Sub Start_Animation(ByVal sender As Object, ByVal e As EventArgs)
End Sub
        <Storyboard x:Name="myStoryboard">

            <!-- Animate the TranslateTransform's X property
           from 0 to 350, then 50, then 200 over 10 seconds. -->
       Duration="0:0:10" EnableDependentAnimation="True">

                <!-- Using a LinearDoubleKeyFrame, the rectangle moves 
           steadily from its starting position to 500 over 
           the first 3 seconds.  -->
                <LinearDoubleKeyFrame Value="500" KeyTime="0:0:3" />

                <!-- Using a DiscreteDoubleKeyFrame, the rectangle suddenly 
           appears at 400 after the fourth second of the animation. -->
                <DiscreteDoubleKeyFrame Value="400" KeyTime="0:0:4" />

                <!-- Using a SplineDoubleKeyFrame, the rectangle moves 
           back to its starting point. The animation starts out slowly at 
           first and then speeds up. This KeyFrame ends after the 6th
           second. -->
                <SplineDoubleKeyFrame KeySpline="0.6,0.0 0.9,0.00" Value="0" KeyTime="0:0:6" />


    <Rectangle PointerPressed="Pointer_Clicked" Fill="Blue"
 Width="50" Height="50">
            <TranslateTransform x:Name="MyAnimatedTranslateTransform" />

// Start the animation when the object loads
private void Start_Animation(object sender, RoutedEventArgs e)
' Start the animation when the object loads
Private Sub Start_Animation(ByVal sender As Object, ByVal e As EventArgs)
End Sub


Use DoubleAnimation to animate the property value of any dependency property that is of type Double.

Sometimes you'll need to use indirect property targeting in order to target a sub-property of another object that's the value of a property on the target. For example, in order to animate the X component of a RenderTransform of a UIElement, you need to reference some of the intermediate object-property values, until the last step in the indirect property path is truly a Double value, as is the case with TranslateTransform.X. The correct string to use for Storyboard.TargetProperty in this example is "(UIElement.RenderTransform).(TranslateTransform.X)". For more info on indirect property targeting and other storyboarded animation concepts, see Storyboarded animations.

A DoubleAnimation typically has at least one of the From, By or To properties set, but never all three.

  • From only: The animation progresses from the value specified by the From property to the base value of the property being animated.
  • From and To: The animation progresses from the value specified by the From property to the value specified by the To property.
  • From and By: The animation progresses from the value specified by the From property to the value specified by the sum of the From and By properties.
  • To only: The animation progresses from the animated property's base value or a previous animation's output value to the value specified by the To property.
  • By only: The animation progresses from the base value of the property being animated or a previous animation's output value to the sum of that value and the value specified by the By property.

You can't animate the X and Y values of a Point using a DoubleAnimation, because these properties aren't dependency properties (Point is a structure and can't have dependency properties.) Instead, use PointAnimation to animate dependency properties that have a Point value.

You also can't use DoubleAnimation to animate int values or byte values. Instead, you'll have to use ObjectAnimationUsingKeyFrames, which won't give you an interpolation behavior, so you might need to define multiple keyframes to get a reasonably smooth animation. There aren't many UI-related dependency properties that use int values or byte values, so this shouldn't be a common scenario other than for custom properties.

The From, By or To properties of a DoubleAnimation aren't strictly a Double. Instead these are a Nullable for Double. The default value for these is null, not 0. That null value is how the animation system distinguishes that you haven't specifically set a value. Visual C++ component extensions (C++/CX) doesn't have a Nullable type, so it uses IReference instead.


DoubleAnimation() DoubleAnimation() DoubleAnimation() DoubleAnimation()

Initializes a new instance of the DoubleAnimation class.


AllowDependentAnimations AllowDependentAnimations AllowDependentAnimations AllowDependentAnimations

Gets or sets a value that determines whether dependent animations should be permitted to run, throughout the app.

(Inherited from Timeline)
AutoReverse AutoReverse AutoReverse AutoReverse

Gets or sets a value that indicates whether the timeline plays in reverse after it completes a forward iteration.

(Inherited from Timeline)
AutoReverseProperty AutoReverseProperty AutoReverseProperty AutoReverseProperty

Identifies the AutoReverse dependency property.

(Inherited from Timeline)
BeginTime BeginTime BeginTime BeginTime

Gets or sets the time at which this Timeline should begin.

(Inherited from Timeline)
BeginTimeProperty BeginTimeProperty BeginTimeProperty BeginTimeProperty

Identifies the BeginTime dependency property.

(Inherited from Timeline)
By By By By

Gets or sets the total amount by which the animation changes its starting value.

ByProperty ByProperty ByProperty ByProperty

Identifies the By dependency property.

Dispatcher Dispatcher Dispatcher Dispatcher

Gets the CoreDispatcher that this object is associated with. The CoreDispatcher represents a facility that can access the DependencyObject on the UI thread even if the code is initiated by a non-UI thread.

(Inherited from DependencyObject)
Duration Duration Duration Duration

Gets or sets the length of time for which this timeline plays, not counting repetitions.

(Inherited from Timeline)
DurationProperty DurationProperty DurationProperty DurationProperty

Identifies the Duration dependency property.

(Inherited from Timeline)
EasingFunction EasingFunction EasingFunction EasingFunction

Gets or sets the easing function applied to this animation.

EasingFunctionProperty EasingFunctionProperty EasingFunctionProperty EasingFunctionProperty

Identifies the EasingFunction dependency property.

EnableDependentAnimation EnableDependentAnimation EnableDependentAnimation EnableDependentAnimation

Gets or sets a value that declares whether animated properties that are considered dependent animations should be permitted to use this animation declaration.

EnableDependentAnimationProperty EnableDependentAnimationProperty EnableDependentAnimationProperty EnableDependentAnimationProperty

Identifies the EnableDependentAnimation dependency property.

FillBehavior FillBehavior FillBehavior FillBehavior

Gets or sets a value that specifies how the animation behaves after it reaches the end of its active period.

(Inherited from Timeline)
FillBehaviorProperty FillBehaviorProperty FillBehaviorProperty FillBehaviorProperty

Identifies the FillBehavior dependency property.

(Inherited from Timeline)
From From From From

Gets or sets the animation's starting value.

FromProperty FromProperty FromProperty FromProperty

Identifies the From dependency property.

RepeatBehavior RepeatBehavior RepeatBehavior RepeatBehavior

Gets or sets the repeating behavior of this timeline.

(Inherited from Timeline)
RepeatBehaviorProperty RepeatBehaviorProperty RepeatBehaviorProperty RepeatBehaviorProperty

Identifies the RepeatBehavior dependency property.

(Inherited from Timeline)
SpeedRatio SpeedRatio SpeedRatio SpeedRatio

Gets or sets the rate, relative to its parent, at which time progresses for this Timeline.

(Inherited from Timeline)
SpeedRatioProperty SpeedRatioProperty SpeedRatioProperty SpeedRatioProperty

Identifies for the SpeedRatio dependency property.

(Inherited from Timeline)
To To To To

Gets or sets the animation's ending value.

ToProperty ToProperty ToProperty ToProperty

Identifies the To dependency property.


ClearValue(DependencyProperty) ClearValue(DependencyProperty) ClearValue(DependencyProperty) ClearValue(DependencyProperty)

Clears the local value of a dependency property.

(Inherited from DependencyObject)
GetAnimationBaseValue(DependencyProperty) GetAnimationBaseValue(DependencyProperty) GetAnimationBaseValue(DependencyProperty) GetAnimationBaseValue(DependencyProperty)

Returns any base value established for a dependency property, which would apply in cases where an animation is not active.

(Inherited from DependencyObject)
GetValue(DependencyProperty) GetValue(DependencyProperty) GetValue(DependencyProperty) GetValue(DependencyProperty)

Returns the current effective value of a dependency property from a DependencyObject.

(Inherited from DependencyObject)
ReadLocalValue(DependencyProperty) ReadLocalValue(DependencyProperty) ReadLocalValue(DependencyProperty) ReadLocalValue(DependencyProperty)

Returns the local value of a dependency property, if a local value is set.

(Inherited from DependencyObject)
RegisterPropertyChangedCallback(DependencyProperty,DependencyPropertyChangedCallback) RegisterPropertyChangedCallback(DependencyProperty,DependencyPropertyChangedCallback) RegisterPropertyChangedCallback(DependencyProperty,DependencyPropertyChangedCallback) RegisterPropertyChangedCallback(DependencyProperty,DependencyPropertyChangedCallback)

Registers a notification function for listening to changes to a specific DependencyProperty on this DependencyObject instance.

(Inherited from DependencyObject)
SetValue(DependencyProperty,Object) SetValue(DependencyProperty,Object) SetValue(DependencyProperty,Object) SetValue(DependencyProperty,Object)

Sets the local value of a dependency property on a DependencyObject.

(Inherited from DependencyObject)
UnregisterPropertyChangedCallback(DependencyProperty,Int64) UnregisterPropertyChangedCallback(DependencyProperty,Int64) UnregisterPropertyChangedCallback(DependencyProperty,Int64) UnregisterPropertyChangedCallback(DependencyProperty,Int64)

Cancels a change notification that was previously registered by calling RegisterPropertyChangedCallback.

(Inherited from DependencyObject)


Completed Completed Completed Completed

Occurs when the Storyboard object has completed playing.

(Inherited from Timeline)

See Also