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31 lines
2.0 KiB
Markdown
31 lines
2.0 KiB
Markdown
---
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title: "How to: Use a ThicknessConverter Object"
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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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- "border thickness [WPF]"
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- "ThicknessConverter objects [WPF]"
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ms.assetid: 52682194-d7fd-499c-8005-73fcc84e7b2c
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---
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# How to: Use a ThicknessConverter Object
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## Example
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This example shows how to create an instance of <xref:System.Windows.ThicknessConverter> and use it to change the thickness of a border.
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The example defines a custom method called `changeThickness`; this method first converts the contents of a <xref:System.Windows.Controls.ListBoxItem>, as defined in a separate [!INCLUDE[TLA#tla_xaml](../../../includes/tlasharptla-xaml-md.md)] file, to an instance of <xref:System.Windows.Thickness>, and later converts the content into a <xref:System.String>. This method passes the <xref:System.Windows.Controls.ListBoxItem> to a <xref:System.Windows.ThicknessConverter> object, which converts the <xref:System.Windows.Controls.ContentControl.Content%2A> of a <xref:System.Windows.Controls.ListBoxItem> to an instance of <xref:System.Windows.Thickness>. This value is then passed back as the value of the <xref:System.Windows.Controls.Border.BorderThickness%2A> property of the <xref:System.Windows.Controls.Border>.
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This example does not run.
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[!code-csharp[ThicknessConverter#1](~/samples/snippets/csharp/VS_Snippets_Wpf/ThicknessConverter/CSharp/Window1.xaml.cs#1)]
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[!code-vb[ThicknessConverter#1](~/samples/snippets/visualbasic/VS_Snippets_Wpf/ThicknessConverter/VisualBasic/Window1.xaml.vb#1)]
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## See also
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- <xref:System.Windows.Thickness>
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- <xref:System.Windows.ThicknessConverter>
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- <xref:System.Windows.Controls.Border>
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- [How to: Change the Margin Property](https://docs.microsoft.com/previous-versions/dotnet/netframework-3.5/ms750561(v=vs.90))
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- [How to: Convert a ListBoxItem to a new Data Type](https://docs.microsoft.com/previous-versions/dotnet/netframework-3.5/ms749147(v=vs.90))
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- [Panels Overview](../controls/panels-overview.md)
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