BitmapFrame.CreateInPlaceBitmapMetadataWriter Method ()

 
System_CAPS_noteNote

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When overridden in a derived class, creates an instance of InPlaceBitmapMetadataWriter, which can be used to associate metadata with a BitmapFrame.

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

public abstract InPlaceBitmapMetadataWriter CreateInPlaceBitmapMetadataWriter()

Metadata can only be added or edited using the CreateInPlaceBitmapMetadataWriter if the image file contains enough room for the new metadata; otherwise, metadata can be added using the Metadata property.

The following code example demonstrates how to use the BitmapFrame object to open a Portable Network Graphics (PNG) graphic and write metadata by using the CreateInPlaceBitmapMetadataWriter method.

Stream pngStream = new System.IO.FileStream("smiley.png", FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
PngBitmapDecoder pngDecoder = new PngBitmapDecoder(pngStream, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
BitmapFrame pngFrame = pngDecoder.Frames[0];
InPlaceBitmapMetadataWriter pngInplace = pngFrame.CreateInPlaceBitmapMetadataWriter();
if (pngInplace.TrySave() == true)
{ pngInplace.SetQuery("/Text/Description", "Have a nice day."); }
pngStream.Close();

.NET Framework
Available since 3.0
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