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PngInterlaceOption Enumeration

Specifies whether a Portable Network Graphics (PNG) format image is interlaced during encoding.

Namespace:  System.Windows.Media.Imaging
Assembly:  PresentationCore (in PresentationCore.dll)

public enum PngInterlaceOption
<object property="enumerationMemberName" .../>

Member nameDescription
DefaultThe PngBitmapEncoder determines whether the image should be interlaced.
OnThe resulting bitmap image is interlaced.
OffThe resulting bitmap image is not interlaced.

Interlacing refers to the process of displaying a PNG frame in two fields. One field contains the even lines of the frame, while the other field contains the odd lines of the frame. When the PNG is viewed, the lines in one field are displayed first, and then the lines in the second field are displayed.

The following example demonstrates how to use the Interlace property of the PngBitmapEncoder class.


FileStream stream = new FileStream("new.png", FileMode.Create);
PngBitmapEncoder encoder = new PngBitmapEncoder();
TextBlock myTextBlock = new TextBlock();
myTextBlock.Text = "Codec Author is: " + encoder.CodecInfo.Author.ToString();
encoder.Interlace = PngInterlaceOption.On;
encoder.Frames.Add(BitmapFrame.Create(image));
encoder.Save(stream);


.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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