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28 lines
2.1 KiB
Markdown
28 lines
2.1 KiB
Markdown
---
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title: "How to: Create an Expander with a ScrollViewer"
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ms.date: "03/30/2017"
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helpviewer_keywords:
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- "controls [WPF], Expander"
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- "ScrollViewer control [WPF], with Expander control"
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- "Expander control [WPF], creating"
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- "controls [WPF], ScrollViewer"
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ms.assetid: 2ad124d2-2406-4157-aaf2-64e067298f01
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---
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# How to: Create an Expander with a ScrollViewer
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This example shows how to create an <xref:System.Windows.Controls.Expander> control that contains complex content, such as an image and text. The example also encloses the content of the <xref:System.Windows.Controls.Expander> in a <xref:System.Windows.Controls.ScrollViewer> control.
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## Example
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The following example shows how to create an <xref:System.Windows.Controls.Expander>. The example uses a <xref:System.Windows.Controls.Primitives.BulletDecorator> control, which contains an image and text, in order to define the <xref:System.Windows.Controls.HeaderedContentControl.Header%2A>. A <xref:System.Windows.Controls.ScrollViewer> control provides a method for scrolling the expanded content.
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Note that the example sets the <xref:System.Windows.FrameworkElement.Height%2A> property on the <xref:System.Windows.Controls.ScrollViewer> instead of on the content. If the <xref:System.Windows.FrameworkElement.Height%2A> is set on the content, the <xref:System.Windows.Controls.ScrollViewer> does not allow the user to scroll the content. The <xref:System.Windows.FrameworkElement.Width%2A> property is set on the <xref:System.Windows.Controls.Expander> control and this setting applies to the <xref:System.Windows.Controls.HeaderedContentControl.Header%2A> and the expanded content.
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[!code-xaml[ExpanderRichContent#CreateExpander](~/samples/snippets/csharp/VS_Snippets_Wpf/ExpanderRichContent/CSharp/Window1.xaml#createexpander)]
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[!code-csharp[ExpanderRichContent#CreateExpanderCode](~/samples/snippets/csharp/VS_Snippets_Wpf/ExpanderRichContent/CSharp/Window1.xaml.cs#createexpandercode)]
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## See also
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- <xref:System.Windows.Controls.Expander>
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- [Expander Overview](expander-overview.md)
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- [How-to Topics](expander-how-to-topics.md)
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