BitmapDecoder.CreateInPlaceBitmapMetadataWriter Method

Reference

Definition

Namespace:: System.Windows.Media.Imaging

Assembly:: PresentationCore.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Creates an instance of InPlaceBitmapMetadataWriter, which can be used to update the metadata of a bitmap.

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

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

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

Public Overridable Function CreateInPlaceBitmapMetadataWriter () As InPlaceBitmapMetadataWriter

Returns

InPlaceBitmapMetadataWriter

An instance of InPlaceBitmapMetadataWriter.

Exceptions

InvalidOperationException

The file original image stream is read only.

NotImplementedException

The decoder is not a built in decoder.

Examples

The following code example demonstrates how to create an InPlaceBitmapMetadataWriter in order to update the metadata associated with a bitmap image.

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()

Applies to

Share via