BitmapFrame.CreateInPlaceBitmapMetadataWriter Method

Reference

Definition

Namespace:: System.Windows.Media.Imaging

Assembly:: PresentationCore.dll

Important

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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.

public:
 abstract System::Windows::Media::Imaging::InPlaceBitmapMetadataWriter ^ CreateInPlaceBitmapMetadataWriter();

public abstract System.Windows.Media.Imaging.InPlaceBitmapMetadataWriter CreateInPlaceBitmapMetadataWriter();

abstract member CreateInPlaceBitmapMetadataWriter : unit -> System.Windows.Media.Imaging.InPlaceBitmapMetadataWriter

Public MustOverride Function CreateInPlaceBitmapMetadataWriter () As InPlaceBitmapMetadataWriter

Returns

InPlaceBitmapMetadataWriter

An InPlaceBitmapMetadataWriter.

Examples

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

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())
{ pngInplace.SetQuery("/Text/Description", "Have a nice day."); }
pngStream.Close();

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()

Remarks

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.

Applies to

Prodotto	Versioni
.NET Framework	3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
Windows Desktop	3.0, 3.1, 5, 6, 7, 8, 9, 10

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