InPlaceBitmapMetadataWriter Class
Assembly: PresentationCore (in presentationcore.dll)
XML Namespace: http://schemas.microsoft.com/winfx/2006/xaml/presentation
'Declaration Public NotInheritable Class InPlaceBitmapMetadataWriter Inherits BitmapMetadata 'Usage Dim instance As InPlaceBitmapMetadataWriter
public final class InPlaceBitmapMetadataWriter extends BitmapMetadata
public final class InPlaceBitmapMetadataWriter extends BitmapMetadata
You cannot use this managed class in XAML.
If BitmapMetadata is not associated with a BitmapFrame that is obtained through a BitmapDecoder, the attempt to write metadata by using the in-place writer will fail. Successful write operations apply the metadata directly to the image stream by means of a decoder.
In-place metadata updates fail if an attempt is made to write metadata that a given bitmap format does not support.
To perform in-place metadata edits, the bitmap must be decoded using either the Default or OnDemand cache options. OnLoad does not guarantee access to the metadata stream needed for in-place metadata edits.
The following code example demonstrates how to use an InPlaceBitmapMetadataWriter to write metadata to a Portable Network Graphics (PNG) image.
Dim pngStream As New System.IO.FileStream("smiley.png", FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite) Dim pngDecoder As New PngBitmapDecoder(pngStream, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default) Dim pngFrame As BitmapFrame = pngDecoder.Frames(0) Dim pngInplace As InPlaceBitmapMetadataWriter = pngFrame.CreateInPlaceBitmapMetadataWriter() If pngInplace.TrySave() = True Then pngInplace.SetQuery("/Text/Description", "Have a nice day.") End If pngStream.Close()
System.Windows.Threading.DispatcherObject
System.Windows.DependencyObject
System.Windows.Freezable
System.Windows.Media.ImageMetadata
System.Windows.Media.Imaging.BitmapMetadata
System.Windows.Media.Imaging.InPlaceBitmapMetadataWriter
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.