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30 lines
1.7 KiB
Markdown
30 lines
1.7 KiB
Markdown
---
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title: "How to: Handle the ScrollChanged Event"
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ms.date: "03/30/2017"
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dev_langs:
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- "csharp"
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- "vb"
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helpviewer_keywords:
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- "ScrollViewer control [WPF], raising ScrollChanged events"
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- "ScrollChanged events [WPF]"
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ms.assetid: 42c695d8-ee28-49d4-80fd-fc71e9be7f29
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---
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# How to: Handle the ScrollChanged Event
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## Example
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This example shows how to handle the <xref:System.Windows.Controls.ScrollViewer.ScrollChanged> event of a <xref:System.Windows.Controls.ScrollViewer>.
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A <xref:System.Windows.Documents.FlowDocument> element with <xref:System.Windows.Documents.Paragraph> parts is defined in [!INCLUDE[TLA2#tla_xaml](../../../includes/tla2sharptla-xaml-md.md)]. When the <xref:System.Windows.Controls.ScrollViewer.ScrollChanged> event occurs due to user interaction, a handler is invoked, and text is written to a <xref:System.Windows.Controls.TextBlock> indicating that the event has occurred.
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[!code-xaml[scrollchangedeventargsLayout#1](~/samples/snippets/csharp/VS_Snippets_Wpf/scrollchangedeventargsLayout/CSharp/Window1.xaml#1)]
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[!code-xaml[scrollchangedeventargsLayout#2](~/samples/snippets/csharp/VS_Snippets_Wpf/scrollchangedeventargsLayout/CSharp/Window1.xaml#2)]
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[!code-csharp[scrollchangedeventargsLayout#3](~/samples/snippets/csharp/VS_Snippets_Wpf/scrollchangedeventargsLayout/CSharp/Window1.xaml.cs#3)]
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[!code-vb[scrollchangedeventargsLayout#3](~/samples/snippets/visualbasic/VS_Snippets_Wpf/scrollchangedeventargsLayout/VisualBasic/Window1.xaml.vb#3)]
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## See also
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- <xref:System.Windows.Controls.ScrollViewer>
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- <xref:System.Windows.Controls.ScrollViewer.ScrollChanged>
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- <xref:System.Windows.Controls.ScrollChangedEventHandler>
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- <xref:System.Windows.Controls.ScrollChangedEventArgs>
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