BitmapDecoder.CreateInPlaceBitmapMetadataWriter Method

Reference

Definition

Namespace:: System.Windows.Media.Imaging

Assembly:: PresentationCore.dll

Important

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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

次の方法で共有