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IKeyFrameAnimation Interface

An IKeyFrameAnimation interface implementation provides untyped access to key frame collection members.

Namespace:  System.Windows.Media.Animation
Assembly:  PresentationCore (in PresentationCore.dll)
public interface IKeyFrameAnimation
Interfaces cannot be used directly in XAML; see types that implement this interface.

This example shows one way to apply an animation to a property without using a Storyboard.

NoteNote:

This functionality is not available in Extensible Application Markup Language (XAML). For information about animating a property in XAML, see How to: Animate a Property by Using a Storyboard.

To apply a local animation to a property, use the BeginAnimation method. This method takes two parameters: a DependencyProperty that specifies the property to animate, and the animation to apply to that property.

The following example shows how to animate the width and background color of a Button.

/*

   This sample demonstrates how to apply non-storyboard animations to a property.
   To animate in markup, you must use storyboards.

*/ 

using System;
using System.Windows;
using System.Windows.Navigation;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Controls;

namespace Microsoft.Samples.Animation.LocalAnimations
{

    // Create the demonstration. 
    public class LocalAnimationExample : Page 
    {




        public LocalAnimationExample()
        {


            WindowTitle = "Local Animation Example";
            StackPanel myStackPanel = new StackPanel();
            myStackPanel.Margin = new Thickness(20);                     


            // Create and set the Button.
            Button aButton = new Button();
            aButton.Content = "A Button";

            // Animate the Button's Width.
            DoubleAnimation myDoubleAnimation = new DoubleAnimation();
            myDoubleAnimation.From = 75;
            myDoubleAnimation.To = 300;
            myDoubleAnimation.Duration =  new Duration(TimeSpan.FromSeconds(5));
            myDoubleAnimation.AutoReverse = true;
            myDoubleAnimation.RepeatBehavior = RepeatBehavior.Forever;

            // Apply the animation to the button's Width property.
            aButton.BeginAnimation(Button.WidthProperty, myDoubleAnimation);       

            // Create and animate a Brush to set the button's Background.
            SolidColorBrush myBrush = new SolidColorBrush();
            myBrush.Color = Colors.Blue;            

            ColorAnimation myColorAnimation = new ColorAnimation();
            myColorAnimation.From = Colors.Blue;
            myColorAnimation.To = Colors.Red;
            myColorAnimation.Duration =  new Duration(TimeSpan.FromMilliseconds(7000));
            myColorAnimation.AutoReverse = true;
            myColorAnimation.RepeatBehavior = RepeatBehavior.Forever;

            // Apply the animation to the brush's Color property.
            myBrush.BeginAnimation(SolidColorBrush.ColorProperty, myColorAnimation);           
            aButton.Background = myBrush;

            // Add the Button to the panel.
            myStackPanel.Children.Add(aButton);
            this.Content = myStackPanel;
        }
    }

}

For the complete sample, see Local Animations Sample.

A variety of animation classes in the System.Windows.Media.Animation namespace exist for animating different types of properties. For more information about animating properties, see Animation Overview. For more information about dependency properties (the type of properties that are shown in these examples) and their features, see Dependency Properties Overview.

There are other ways to animate without using Storyboard objects; for more information, see Property Animation Techniques Overview.

More Code

How to: Animate a Property by Using a Storyboard This example shows how to use a Storyboard to animate properties. To animate a property by using a Storyboard, create an animation for each property that you want to animate and also create a Storyboard to contain the animations.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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

.NET Framework

Supported in: 3.5, 3.0
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