DoubleAnimationUsingKeyFrames class

Applies to Windows and Windows Phone

Animates the value of a Double property along a set of key frames.




public sealed class DoubleAnimationUsingKeyFrames : Timeline


XAML Values


One or more object elements that define the key frames for the animation. These object elements represent one of the classes deriving from DoubleKeyFrame. These are typically any combination of LinearDoubleKeyFrame, DiscreteDoubleKeyFrame, EasingDoubleKeyFrame, and SplineDoubleKeyFrame. Object elements defined here become members of the collection when code accesses the KeyFrames property at run time.




The DoubleAnimationUsingKeyFrames class has these types of members:


The DoubleAnimationUsingKeyFrames class has these constructors.

DoubleAnimationUsingKeyFrames Initializes a new instance of the DoubleAnimationUsingKeyFrames class.



The DoubleAnimationUsingKeyFrames class has these events.

Completed Occurs when the Storyboard object has completed playing. (Inherited from Timeline)



The DoubleAnimationUsingKeyFrames class has these methods. It also inherits methods from the Object class.

ClearValue Clears the local value of a dependency property. (Inherited from DependencyObject)
GetAnimationBaseValue Returns any base value established for a dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject)
GetValue Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject)
ReadLocalValue Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject)
SetValue Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject)



The DoubleAnimationUsingKeyFrames class has these properties.

PropertyAccess typeDescription


Read/writeGets or sets a value that indicates whether the timeline plays in reverse after it completes a forward iteration. (Inherited from Timeline)


Read/writeGets or sets the time at which this Timeline should begin. (Inherited from Timeline)


Read-onlyGets the CoreDispatcher that this object is associated with. (Inherited from DependencyObject)


Read/writeGets or sets the length of time for which this timeline plays, not counting repetitions. (Inherited from Timeline)


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


Read-onlyIdentifies the EnableDependentAnimation dependency property.


Read/writeGets or sets a value that specifies how the animation behaves after it reaches the end of its active period. (Inherited from Timeline)


Read-onlyGets the collection of DoubleKeyFrame objects that define the animation.


Read/writeGets or sets the repeating behavior of this timeline. (Inherited from Timeline)


Read/writeGets or sets the rate, relative to its parent, at which time progresses for this Timeline. (Inherited from Timeline)



The following example moves a rectangle across a screen. The example uses the DoubleAnimationUsingKeyFrames class to animate the X property of a TranslateTransform applied to a Rectangle. This animation uses three key frames in the following manner:

  1. During the first three seconds, it uses an instance of the LinearDoubleKeyFrame class to move the rectangle along a path at a steady rate from its starting position to the 500 position. Linear key frames like LinearDoubleKeyFrame create a smooth linear transition between values.

  2. At the end of the fourth second, it uses an instance of the DiscreteDoubleKeyFrame class to suddenly move the rectangle to the next position. Discrete key frames like DiscreteDoubleKeyFrame create sudden jumps between values. In this example, the rectangle is at the starting position and then suddenly appears at the 500 position.

  3. In the final two seconds, it uses an instance of the SplineDoubleKeyFrame class to move the rectangle back to its starting position. Spline key frames like SplineDoubleKeyFrame create a variable transition between values according to the value of the KeySpline property. In this example, the rectangle begins by moving slowly and then speeds up exponentially toward the end of the time segment.

// Start the animation when the object loads
private void Start_Animation(object sender, RoutedEventArgs e)

        <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 Fill="Blue" Width="50" Height="50" Loaded="Start_Animation">
            <TranslateTransform x:Name="MyAnimatedTranslateTransform" 
             X="0" Y="0" />


Minimum supported client

Windows 8 [Windows Store apps only]

Minimum supported server

Windows Server 2012 [Windows Store apps only]

Minimum supported phone

Windows Phone 8.1 [Windows Runtime apps only]


Windows::UI::Xaml::Media::Animation [C++]



See also

Storyboarded animations



© 2015 Microsoft