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36 lines
2.4 KiB
Markdown
36 lines
2.4 KiB
Markdown
---
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title: "How to: Extract the Text Content from a RichTextBox"
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description: Learn how to extract the Text Content from a RichTextBox.
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ms.date: "03/30/2017"
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ms.custom: devdivchpfy22
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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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- "text content [WPF], extracting"
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- "RichTextBox control [WPF], extracting text content"
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- "content [WPF], extracting"
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- "extracting text content [WPF]"
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ms.assetid: f13c093f-1a05-45b3-ac8f-c9ea5e4a11c5
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---
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# How to: Extract the Text Content from a RichTextBox
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This example shows how to extract the contents of a <xref:System.Windows.Controls.RichTextBox> as plain text.
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## Describe a RichTextBox control
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The following Extensible Application Markup Language (XAML) code describes a named <xref:System.Windows.Controls.RichTextBox> control with simple content.
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[!code-xaml[RichTextBoxSnippets#_RTB_XAML](~/samples/snippets/csharp/VS_Snippets_Wpf/RichTextBoxSnippets/CSharp/Window1.xaml#_rtb_xaml)]
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## Code example with RichTextBox as an argument
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The following code implements a method that takes a <xref:System.Windows.Controls.RichTextBox> as an argument, and returns a string representing the plain text contents of the <xref:System.Windows.Controls.RichTextBox>.
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The method creates a new <xref:System.Windows.Documents.TextRange> from the contents of the <xref:System.Windows.Controls.RichTextBox>, using the <xref:System.Windows.Documents.FlowDocument.ContentStart%2A> and <xref:System.Windows.Documents.FlowDocument.ContentEnd%2A> to indicate the range of the contents to extract. <xref:System.Windows.Documents.FlowDocument.ContentStart%2A> and <xref:System.Windows.Documents.FlowDocument.ContentEnd%2A> properties each return a <xref:System.Windows.Documents.TextPointer>, and are accessible on the underlying FlowDocument that represents the contents of the <xref:System.Windows.Controls.RichTextBox>. <xref:System.Windows.Documents.TextRange> provides a Text property, which returns the plain text portions of the <xref:System.Windows.Documents.TextRange> as a string.
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[!code-csharp[RichTextBoxSnippets#_RTB_StringFrom](~/samples/snippets/csharp/VS_Snippets_Wpf/RichTextBoxSnippets/CSharp/Window1.xaml.cs#_rtb_stringfrom)]
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[!code-vb[RichTextBoxSnippets#_RTB_StringFrom](~/samples/snippets/visualbasic/VS_Snippets_Wpf/RichTextBoxSnippets/visualbasic/window1.xaml.vb#_rtb_stringfrom)]
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## See also
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- [RichTextBox Overview](richtextbox-overview.md)
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- [TextBox Overview](textbox-overview.md)
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