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30 lines
1.9 KiB
Markdown
30 lines
1.9 KiB
Markdown
---
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title: "How to: Encode a Visual to an Image File"
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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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- "image files [WPF], encoding from visuals"
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- "encoding image formats [WPF]"
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- "visuals [WPF], encoding to an image file"
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ms.assetid: 2036385b-ea47-4d54-8027-5797f52c8149
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---
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# How to: Encode a Visual to an Image File
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This example demonstrates how to encode a <xref:System.Windows.Media.Visual> object into an image file using a <xref:System.Windows.Media.Imaging.RenderTargetBitmap> and a <xref:System.Windows.Media.Imaging.PngBitmapEncoder>.
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## Example
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The <xref:System.Windows.Media.DrawingVisual> is created using a <xref:System.Windows.Media.Imaging.BitmapImage> and <xref:System.Windows.Media.FormattedText> which is rendered to a <xref:System.Windows.Media.Imaging.RenderTargetBitmap>. The rendered bitmap is then used to create a <xref:System.Windows.Media.Imaging.BitmapFrame> which is added to the <xref:System.Windows.Media.Imaging.PngBitmapEncoder> to create a new Portable Network Graphics (PNG) file.
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[!code-csharp[ImagingSnippetGallery_procedural_snip#RTBEncodeInline1](~/samples/snippets/csharp/VS_Snippets_Wpf/ImagingSnippetGallery_procedural_snip/CSharp/RenderTargetBitmapExample_Encode.cs#rtbencodeinline1)]
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[!code-vb[ImagingSnippetGallery_procedural_snip#RTBEncodeInline1](~/samples/snippets/visualbasic/VS_Snippets_Wpf/ImagingSnippetGallery_procedural_snip/VB/RenderTargetBitmapExample_Encode.vb#rtbencodeinline1)]
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A <xref:System.Windows.Media.Imaging.PngBitmapEncoder> was used in this example but any of the derived <xref:System.Windows.Media.Imaging.BitmapEncoder> objects could have been used to create the image file.
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## See also
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- <xref:System.Windows.Media.DrawingContext>
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- [Imaging Overview](imaging-overview.md)
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- [Drawing Objects Overview](drawing-objects-overview.md)
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- [Using DrawingVisual Objects](using-drawingvisual-objects.md)
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