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30 lines
1.9 KiB
Markdown
30 lines
1.9 KiB
Markdown
---
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title: "How to: Animate a String by Using Key Frames"
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ms.date: "03/30/2017"
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helpviewer_keywords:
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- "animation [WPF], strings with key frames"
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- "strings [WPF], animating with key frames"
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- "key frames [WPF], animating strings with"
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ms.assetid: c62bc9fd-c09a-4227-bce0-0a1ab82049dd
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---
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# How to: Animate a String by Using Key Frames
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This example shows how to animate a string, which in this example is the <xref:System.Windows.Controls.ContentControl.Content%2A> property of a <xref:System.Windows.Controls.Button> control, by using key frames.
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## Example
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The following example uses the <xref:System.Windows.Media.Animation.StringAnimationUsingKeyFrames> class to animate the <xref:System.Windows.Controls.ContentControl.Content%2A> property of a <xref:System.Windows.Controls.Button>.
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All the key frames in this example use an instance of the <xref:System.Windows.Media.Animation.DiscreteStringKeyFrame> class because a string animation that is created with key frames can only use discrete key frames. Discrete key frames like <xref:System.Windows.Media.Animation.DiscreteStringKeyFrame> create sudden jumps between values, that is, changes to the animation occur quickly and are not subtle.
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[!code-xaml[keyframes_snip#StringAnimationUsingKeyFramesWholePage](~/samples/snippets/xaml/VS_Snippets_Wpf/keyframes_snip/XAML/StringAnimationUsingKeyFramesExample.xaml#stringanimationusingkeyframeswholepage)]
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For the complete sample, see [KeyFrame Animation Sample](https://github.com/microsoft/WPF-Samples/tree/master/Animation/KeyFrameAnimation).
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## See also
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- <xref:System.Windows.Media.Animation.StringAnimationUsingKeyFrames>
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- <xref:System.Windows.Controls.ContentControl.Content%2A>
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- <xref:System.Windows.Controls.Button>
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- <xref:System.Windows.Media.Animation.DiscreteStringKeyFrame>
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- [Key-Frame Animations Overview](key-frame-animations-overview.md)
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- [Key-Frame How-to Topics](key-frame-animation-how-to-topics.md)
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