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Convert PDF to JPG

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PdfProcessing

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answered on 01 Jun 2015, 01:09 PM

Hello Blas,

RadPdfProcessing is independent of UI library and has no notion of the way the document should be visualized. This is why is not possible to export a PDF document to image using this library.

In order to achieve your goal, you could use the PdfViewer control to import the document and create images from its pages using the ThumbnailFactory class. The following snippet demonstrates how to achieve this for the first page of the RadFixedDocument:

PdfFormatProvider docProvider = new PdfFormatProvider();

var data = docProvider.Export(doc);

PdfFormatProvider provider = new PdfFormatProvider(new MemoryStream(data), FormatProviderSettings.ReadOnDemand);

this.viewer.Document = provider.Import();

ThumbnailFactory factory = new ThumbnailFactory();

RadFixedPage page = this.viewer.Document.Pages[0];

ImageSource source = factory.CreateThumbnail(page, page.Size);

Image image = new Image();

image.Source = source;

// This adds white background, because the image that ThumbnailFactory creates is transparent.

Grid grid = new Grid();

grid.Background = Brushes.White;

grid.Children.Add(image);

Size size = new Size(600, 800);

grid.Measure(size);

grid.Arrange(new Rect(new Point(0, 0), size));

RenderTargetBitmap bitmap = new RenderTargetBitmap((int)size.Width, (int)size.Height, 96, 96, PixelFormats.Pbgra32);

bitmap.Render(grid);

using (var fileStream = new FileStream("test.jpeg", FileMode.Create))

{

System.Windows.Media.Imaging.BitmapEncoder encoder = new JpegBitmapEncoder();

ExportExtensions.ExportToImage(grid, fileStream, encoder);

}

The ThumbnailFactory returns a picture of the content of the document and it may not have background set. The additional steps in the snippet above are used to set a background for the image.

Hope this helps.

Regards,
Tanya
Telerik

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answered on 02 Jun 2015, 02:52 PM

Hi Tania,

I didn't see your last response... In any case, I included in my project some WPF dlls but I'm having some problems.

In the last line, I get an VS error saying "page: a value of the type Telerik.Windows.Pdf.Documents.Fixed.Model.RadFixedPage cannot be converted to the type Telerik.Windows.Documents.Fixed.Model.RadFixedPage.

Viewer.LoadDocument("C:\temp\file.pdf")

Dim factory As New Telerik.Windows.Documents.UI.ThumbnailFactory()

Dim page As RadFixedPage = Viewer.Document.Pages.Item(0)

Dim source As System.Windows.Media.ImageSource = factory.CreateThumbnail(page, New Windows.Size(page.Size.Width, page.Size.Height))

answered on 25 Jul 2018, 03:36 PM

Hello Mikhail,

The Telerik.Windows.Controls.FixedDocumentViewers.dll file is available since the Q1 2012 release of UI for WPF and should be present in the Binaries folder if you have a newer version. In case you are facing any issues using the PdfViewer control, I would like to ask you to submit your questions in the forum section dedicated to the specific component: https://www.telerik.com/forums/wpf/pdfviewer. Thank you in advance.

Regards,
Tanya
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answered on 16 Feb 2022, 11:28 PM

Here is a sample code working.

using System;
using System.IO;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using Telerik.Windows.Controls;
using Telerik.Windows.Documents.Fixed.FormatProviders.Pdf;

using Telerik.Windows.Documents.UI;
using ExportExtensions = Telerik.Windows.Media.Imaging.ExportExtensions;

namespace Pdf2Image
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            Convert();
        }
        
        private void Convert()
        { 

            var diag = new RadOpenFileDialog
            {
                Filter = "Pdf|*.pdf"
            };
            diag.ShowDialog();

            try
            {
                var stream = new FileStream(diag.FileName, FileMode.Open);

                var pdfFormatProvider = new PdfFormatProvider
                {
                    ImportSettings = Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.PdfImportSettings.ReadOnDemand
                };

                var doc = pdfFormatProvider.Import(stream);
                var docProvider = new PdfFormatProvider();
                var data = docProvider.Export(doc);

                var provider = new PdfFormatProvider();
                viewer.Document = provider.Import(new MemoryStream(data)); // TODO: viewer = Add a RadPdfViewer control

                var factory = new ThumbnailFactory();
                var nPage = 0;
                var cDir = $"{Path.GetDirectoryName(diag.FileName)}\\pages_{Path.GetFileName(diag.FileName)[..^4]}";
                try
                {
                    Directory.CreateDirectory(cDir);
                }
                catch { }

                foreach (var page in this.viewer.Document.Pages)
                {
                    nPage++;
                    var source = factory.CreateThumbnail(page, page.Size);

                    var image = new Image
                    {
                        Source = source
                    };

                    var grid = new Grid
                    {
                        Background = Brushes.Black
                    };
                    grid.Children.Add(image);

                    var size = new Size(945, 528);
                    grid.Measure(size);
                    grid.Arrange(new Rect(new Point(0, 0), size));

                    var bitmap = new RenderTargetBitmap((int)size.Width, (int)size.Height, 96, 96, PixelFormats.Pbgra32);
                    bitmap.Render(grid);

                    var cFile = $"{cDir}\\{(nPage < 100 ? "0" : "")}{(nPage < 10 ? "0" : "")}{nPage}.jpeg";
                    if (File.Exists(cFile)) File.Delete(cFile);
                    using var fileStream = new FileStream(cFile, FileMode.Create);
                    BitmapEncoder encoder = new JpegBitmapEncoder();
                    ExportExtensions.ExportToImage(grid, fileStream, encoder);
                }
            }
            catch
            {

            }
            this.Close();

            // #jefferson2020 Happy 2025
        }


    }
}

Dimitar

commented on 21 Feb 2022, 09:43 AM

Hi Jefferson,

Thank you for sharing your solution with the community. I am sure that someone will benefit from it.

Regards,

Dimitar

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Convert PDF to JPG

10 Answers, 1 is accepted