Export RadFixedPage to image

Product Version	Product	Author
bellow 2020.2.513 or above*	RadPdfProcessing	Martin Velikov
bellow 2020.2.513 or above*	RadPdfViewer

* Due to the new PdfViewer's document model transition, there is a difference in the implementation between different assemblies version.

Description

How to export RadFixedPage to TIFF file.

Solution

To achieve this we can use the RadPdfViewer control form the UI for WPF suite to create images from the RadFixedDocument pages using the ThumbnailFactory class. q

The COM threading model for the application has to be a single-threaded apartment (STA). A STAThreadAttribute tag "[STAThread]" should be placed on the class.

Assemblies version bellow 2020.2.513

[STAThread] 
private static void Main(string[] args) 
{ 
    PdfFormatProvider pdfProcessingProvider = new PdfFormatProvider(); 
    RadFixedDocument document = GetRadFixedDocument(pdfProcessingProvider); 
 
    byte[] data = pdfProcessingProvider.Export(document); 
 
    RadPdfViewer pdfViewer = new RadPdfViewer(); 
 
    PdfFormatProvider pdfViewerProvider = new PdfFormatProvider(new MemoryStream(data), FormatProviderSettings.ReadAllAtOnce); 
    pdfViewer.Document = pdfViewerProvider.Import(); 
 
    int pageNumber = 0; 
    RadFixedPage page = pdfViewer.Document.Pages[pageNumber]; 
 
    ThumbnailFactory factory = new ThumbnailFactory(); 
    ImageSource imageSource = factory.CreateThumbnail(page, page.Size); 
 
    Image image = new Image(); 
    image.Source = imageSource; 
 
    Grid container = new Grid(); 
    container.Background = Brushes.White; 
    container.Children.Add(image); 
    container.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity)); 
    container.Arrange(new Rect(new Point(0, 0), container.DesiredSize)); 
 
    RenderTargetBitmap bitmap = new RenderTargetBitmap((int)PageLayoutHelper.GetActualWidth(page), (int)PageLayoutHelper.GetActualHeight(page), 96, 96, PixelFormats.Pbgra32); 
    bitmap.Render(container); 
 
    string exportedFileName = "Exported.tiff"; 
    using (FileStream fileStream = new FileStream(exportedFileName, FileMode.Create)) 
    { 
        BitmapEncoder encoder = new TiffBitmapEncoder(); 
        encoder.Frames.Add(BitmapFrame.Create(bitmap)); 
        encoder.Save(fileStream); 
    } 
} 

Assemblies version 2020.2.513 or above

[STAThread] 
private static void Main(string[] args) 
{ 
    PdfFormatProvider pdfProcessingProvider = new PdfFormatProvider(); 
    RadFixedDocument document = GetRadFixedDocument(pdfProcessingProvider); 
 
    int pageNumber = 0; 
    RadFixedPage page = document.Pages[pageNumber]; 
 
    ThumbnailFactory factory = new ThumbnailFactory(); 
    ImageSource imageSource = factory.CreateThumbnail(page, page.Size); 
 
    Image image = new Image(); 
    image.Source = imageSource; 
 
    Grid container = new Grid(); 
    container.Background = Brushes.White; 
    container.Children.Add(image); 
    container.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity)); 
    container.Arrange(new Rect(new Point(0, 0), container.DesiredSize)); 
 
    RenderTargetBitmap bitmap = new RenderTargetBitmap((int)PageLayoutHelper.GetActualWidth(page), (int)PageLayoutHelper.GetActualHeight(page), 96, 96, PixelFormats.Pbgra32); 
    bitmap.Render(container); 
 
    string exportedFileName = "Exported.tiff"; 
    using (FileStream fileStream = new FileStream(exportedFileName, FileMode.Create)) 
    { 
        BitmapEncoder encoder = new TiffBitmapEncoder(); 
        encoder.Frames.Add(BitmapFrame.Create(bitmap)); 
        encoder.Save(fileStream); 
    } 
}