GetThumbnailImage(EventHandler<ProgressEventArgs>) Method (Cr2Page)

In This Topic

Returns a thumbnail image associated with this image page.

Syntax

Visual Basic
C#
Managed Extensions for C++
C++/CLI

'Declaration

Public Overloads Overrides Function GetThumbnailImage( _
   ByVal progressDelegateProgress delegate.
 As System.EventHandler(Of ProgressEventArgs) _
) As Vintasoft.Imaging.VintasoftImage

public override Vintasoft.Imaging.VintasoftImage GetThumbnailImage(
   System.EventHandler<ProgressEventArgs> progressDelegate
)

public: Vintasoft.Imaging.VintasoftImage* GetThumbnailImage(
   System.EventHandler<ProgressEventArgs*>* progressDelegate
); override

public:
Vintasoft.Imaging.VintasoftImage^ GetThumbnailImage(
   System.EventHandler<ProgressEventArgs^>^ progressDelegate
); override

Parameters

progressDelegate: Progress delegate.

Return Value

The thumbnail image associated with this ImagePage object if thumbnail image was loaded successfully; otherwise, null.

Example

Here is an example that shows how to open Canon CR2-file, get thumbnail image from CR2-file and save image to a PNG-file:

VB.NET


''' <summary>
''' Opens Canon CR2-file, gets thumbnail image from CR2-file and saves image to a PNG-file.
''' </summary>
''' <param name="cr2Filename">The name of CR2-file.</param>
Public Sub GetAndSaveCr2Thumbnail(cr2Filename As String)
    ' open CR2-file stream
    Using fs As New System.IO.FileStream(cr2Filename, System.IO.FileMode.Open, System.IO.FileAccess.Read)
        ' open CR2-file
        Dim rawImageFile As New Vintasoft.Imaging.Codecs.ImageFiles.Raw.RawImageFile(fs)
        ' get CR2-page
        Dim cr2Page As Vintasoft.Imaging.Codecs.ImageFiles.Raw.Cr2Page = TryCast(rawImageFile.Page, Vintasoft.Imaging.Codecs.ImageFiles.Raw.Cr2Page)
        ' if CR2-page is found in RAW-file
        If cr2Page IsNot Nothing Then
            ' get thumbnail image from CR2-file
            Using thumbnailImage As Vintasoft.Imaging.VintasoftImage = cr2Page.GetThumbnailImage()
                ' save image to a PNG file
                thumbnailImage.Save(cr2Filename & ".png")
            End Using
        End If
    End Using
End Sub


/// <summary>
/// Opens Canon CR2-file, gets thumbnail image from CR2-file and saves image to a PNG-file.
/// </summary>
/// <param name="cr2Filename">The name of CR2-file.</param>
public void GetAndSaveCr2Thumbnail(string cr2Filename)
{
    // open CR2-file stream
    using (System.IO.FileStream fs = new System.IO.FileStream(cr2Filename, System.IO.FileMode.Open, System.IO.FileAccess.Read))
    {
        // open CR2-file
        Vintasoft.Imaging.Codecs.ImageFiles.Raw.RawImageFile rawImageFile =
            new Vintasoft.Imaging.Codecs.ImageFiles.Raw.RawImageFile(fs);
        // get CR2-page
        Vintasoft.Imaging.Codecs.ImageFiles.Raw.Cr2Page cr2Page =
            rawImageFile.Page as Vintasoft.Imaging.Codecs.ImageFiles.Raw.Cr2Page;
        // if CR2-page is found in RAW-file
        if (cr2Page != null)
        {
            // get thumbnail image from CR2-file
            using (Vintasoft.Imaging.VintasoftImage thumbnailImage = cr2Page.GetThumbnailImage())
            {
                // save image to a PNG file
                thumbnailImage.Save(cr2Filename + ".png");
            }
        }
    }
}

Requirements

Target Platforms: .NET9; .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

Reference

Cr2Page Class
Cr2Page Members

Overload List

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