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* Suggestion/warning fixes for US-1889327. * Updated H2s. * Minor content edit. * Review edits. * Minor edits. * Update dotnet-desktop-guide/framework/wpf/advanced/localization-attributes-and-comments.md Co-authored-by: Andy (Steve) De George <[email protected]>
70 lines
4.7 KiB
Markdown
70 lines
4.7 KiB
Markdown
---
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title: "How to: Manipulate Flow Content Elements through the Blocks Property"
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ms.date: "03/30/2017"
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ms.custom: devdivchpfy22
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description: Learn how to manipulate Flow Content Elements through the Blocks property.
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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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- "documents [WPF], manipulating flow content elements through Blocks property"
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- "flow content elements [WPF], manipulating through Blocks property"
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- "properties [WPF], Blocks [WPF], manipulating flow content elements"
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- "Blocks property [WPF], manipulating flow content elements"
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ms.assetid: aeda4ece-b979-4818-a093-ef938e908751
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---
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# How to: Manipulate Flow Content Elements through the Blocks Property
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These examples demonstrate some of the more common operations that can be performed on flow content elements through the **Blocks** property. This property is used to add and remove items from <xref:System.Windows.Documents.BlockCollection>. Flow content elements that feature a **Blocks** property include:
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- <xref:System.Windows.Documents.Figure>
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- <xref:System.Windows.Documents.Floater>
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- <xref:System.Windows.Documents.ListItem>
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- <xref:System.Windows.Documents.Section>
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- <xref:System.Windows.Documents.TableCell>
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These examples happen to use <xref:System.Windows.Documents.Section> as the flow content element, but these techniques are applicable to all elements that host a flow content element collection.
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## Create a new Section
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The following example creates a new <xref:System.Windows.Documents.Section> and then uses the **Add** method to add a new Paragraph to the **Section** contents.
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[!code-csharp[FlowDocumentSnippets#_SectionBlocksAdd](~/samples/snippets/csharp/VS_Snippets_Wpf/FlowDocumentSnippets/CSharp/Window1.xaml.cs#_sectionblocksadd)]
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[!code-vb[FlowDocumentSnippets#_SectionBlocksAdd](~/samples/snippets/visualbasic/VS_Snippets_Wpf/FlowDocumentSnippets/visualbasic/window1.xaml.vb#_sectionblocksadd)]
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## Create a new Paragraph element
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The following example creates a new <xref:System.Windows.Documents.Paragraph> element and inserts it at the beginning of the <xref:System.Windows.Documents.Section>.
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[!code-csharp[FlowDocumentSnippets#_SectionBlocksInsert](~/samples/snippets/csharp/VS_Snippets_Wpf/FlowDocumentSnippets/CSharp/Window1.xaml.cs#_sectionblocksinsert)]
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[!code-vb[FlowDocumentSnippets#_SectionBlocksInsert](~/samples/snippets/visualbasic/VS_Snippets_Wpf/FlowDocumentSnippets/visualbasic/window1.xaml.vb#_sectionblocksinsert)]
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## Get the top-level Block elements in the Section
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The following example gets the number of top-level <xref:System.Windows.Documents.Block> elements contained in the <xref:System.Windows.Documents.Section>.
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[!code-csharp[FlowDocumentSnippets#_SectionBlocksCount](~/samples/snippets/csharp/VS_Snippets_Wpf/FlowDocumentSnippets/CSharp/Window1.xaml.cs#_sectionblockscount)]
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[!code-vb[FlowDocumentSnippets#_SectionBlocksCount](~/samples/snippets/visualbasic/VS_Snippets_Wpf/FlowDocumentSnippets/visualbasic/window1.xaml.vb#_sectionblockscount)]
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## Delete the last Block element in the Section
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The following example deletes the last <xref:System.Windows.Documents.Block> element in the <xref:System.Windows.Documents.Section>.
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[!code-csharp[FlowDocumentSnippets#_SectionBlocksRemoveLast](~/samples/snippets/csharp/VS_Snippets_Wpf/FlowDocumentSnippets/CSharp/Window1.xaml.cs#_sectionblocksremovelast)]
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[!code-vb[FlowDocumentSnippets#_SectionBlocksRemoveLast](~/samples/snippets/visualbasic/VS_Snippets_Wpf/FlowDocumentSnippets/visualbasic/window1.xaml.vb#_sectionblocksremovelast)]
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## Clear all the Block element content from the Section
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The following example clears all of the contents (<xref:System.Windows.Documents.Block> elements) from the <xref:System.Windows.Documents.Section>.
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[!code-csharp[FlowDocumentSnippets#_SectionBlocksClear](~/samples/snippets/csharp/VS_Snippets_Wpf/FlowDocumentSnippets/CSharp/Window1.xaml.cs#_sectionblocksclear)]
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[!code-vb[FlowDocumentSnippets#_SectionBlocksClear](~/samples/snippets/visualbasic/VS_Snippets_Wpf/FlowDocumentSnippets/visualbasic/window1.xaml.vb#_sectionblocksclear)]
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## See also
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- <xref:System.Windows.Documents.BlockCollection>
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- <xref:System.Windows.Documents.InlineCollection>
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- <xref:System.Windows.Documents.ListItemCollection>
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- [Flow Document Overview](flow-document-overview.md)
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- [Manipulate a Table's Row Groups through the RowGroups Property](how-to-manipulate-table-row-groups-through-the-rowgroups-property.md)
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- [Manipulate a Table's Columns through the Columns Property](how-to-manipulate-table-columns-through-the-columns-property.md)
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- [Manipulate a Table's Row Groups through the RowGroups Property](how-to-manipulate-table-row-groups-through-the-rowgroups-property.md)
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