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37 lines
1.8 KiB
Markdown
37 lines
1.8 KiB
Markdown
---
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title: "How to: Encode and Decode a PNG Image"
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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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- "cpp"
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helpviewer_keywords:
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- "PNG encoding [WPF]"
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- "decoding PNG images [WPF]"
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- "PNG decoding [WPF]"
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- "encoding image formats [WPF]"
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- "decoding image formats [WPF]"
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- "encoding PNG images [WPF]"
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ms.assetid: 3d31d186-af73-47f0-b5a7-c26ae46409a6
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---
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# How to: Encode and Decode a PNG Image
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The following examples show how to decode and encode a Portable Network Graphics (PNG) image using the specific <xref:System.Windows.Media.Imaging.PngBitmapDecoder> and <xref:System.Windows.Media.Imaging.PngBitmapEncoder> objects.
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## Example
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This example demonstrates how to decode a PNG image using a <xref:System.Windows.Media.Imaging.PngBitmapDecoder> from a <xref:System.IO.FileStream>.
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[!code-cpp[PngBitmapDecoderEncoder#1](~/samples/snippets/cpp/VS_Snippets_Wpf/PngBitmapDecoderEncoder/CPP/PngEncoderDecoder.cpp#1)]
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[!code-csharp[PngBitmapDecoderEncoder#1](~/samples/snippets/csharp/VS_Snippets_Wpf/PngBitmapDecoderEncoder/CSharp/PngEncoderDecoder.cs#1)]
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[!code-vb[PngBitmapDecoderEncoder#1](~/samples/snippets/visualbasic/VS_Snippets_Wpf/PngBitmapDecoderEncoder/VB/PngEncoderDecoder.vb#1)]
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## Example
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This example demonstrates how to encode a <xref:System.Windows.Media.Imaging.BitmapSource> into a PNG image using a <xref:System.Windows.Media.Imaging.PngBitmapEncoder>.
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[!code-cpp[PngBitmapDecoderEncoder#4](~/samples/snippets/cpp/VS_Snippets_Wpf/PngBitmapDecoderEncoder/CPP/PngEncoderDecoder.cpp#4)]
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[!code-csharp[PngBitmapDecoderEncoder#4](~/samples/snippets/csharp/VS_Snippets_Wpf/PngBitmapDecoderEncoder/CSharp/PngEncoderDecoder.cs#4)]
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[!code-vb[PngBitmapDecoderEncoder#4](~/samples/snippets/visualbasic/VS_Snippets_Wpf/PngBitmapDecoderEncoder/VB/PngEncoderDecoder.vb#4)]
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## See also
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- [Imaging Overview](imaging-overview.md)
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