Converting PDF to TIFF with RadPdfProcessing in .NET Standard

Environment

Description

Learn how to convert PDF documents to TIFF format in .NET Standard.

Solution

To convert PDF documents to TIFF images in .NET Standard, follow these steps:

1. Use the SkiaImageFormatProvider to export the PDF pages to images.
2. Utilize the System.Drawing.Common library to assemble these images into a multi-page TIFF file.

Here's an example code snippet demonstrating the process:

using System.Diagnostics;
using System.Drawing;
using System.Drawing.Imaging;
using Telerik.Documents.Fixed.FormatProviders.Image.Skia;
using Telerik.Windows.Documents.Fixed.FormatProviders.Pdf;
using Telerik.Windows.Documents.Fixed.Model;
using System.IO;

namespace PdfToTIFFNetCore
{
    internal class Program
    {
        [STAThread]
        static void Main(string[] args)
        {
            PdfFormatProvider pdfFormatProvider = new PdfFormatProvider();
            RadFixedDocument fixedDocument = pdfFormatProvider.Import(File.ReadAllBytes("your-pdf-file.pdf"), TimeSpan.FromSeconds(10));
            SkiaImageFormatProvider imageProvider = new SkiaImageFormatProvider();
            string exportedFileName = "Exported.tiff";
            using (FileStream fileStream = new FileStream(exportedFileName, FileMode.Create))
            {
                System.Drawing.Imaging.Encoder encoder = System.Drawing.Imaging.Encoder.SaveFlag;
                ImageCodecInfo codecInfo = GetEncoderInfo("image/tiff");
                EncoderParameters encoderParams = new EncoderParameters(1);
                encoderParams.Param[0] = new EncoderParameter(encoder, (long)EncoderValue.MultiFrame);

                Bitmap firstImage = null;
                bool firstFrame = true;

                foreach (RadFixedPage page in fixedDocument.Pages)
                {
                    byte[] resultImage = imageProvider.Export(page, TimeSpan.FromSeconds(10));
                    using (MemoryStream ms = new MemoryStream(resultImage))
                    {
                        using (Bitmap bitmap = new Bitmap(ms))
                        {
                            if (firstFrame)
                            {
                                firstImage = new Bitmap(bitmap);
                                firstImage.Save(fileStream, codecInfo, encoderParams);
                                firstFrame = false;
                            }
                            else
                            {
                                encoderParams.Param[0] = new EncoderParameter(encoder, (long)EncoderValue.FrameDimensionPage);
                                firstImage.SaveAdd(bitmap, encoderParams);
                            }
                        }
                    }
                }

                encoderParams.Param[0] = new EncoderParameter(encoder, (long)EncoderValue.Flush);
                firstImage.SaveAdd(encoderParams);
            }

            Process.Start(new ProcessStartInfo() { FileName = exportedFileName, UseShellExecute = true });
        }

        private static ImageCodecInfo GetEncoderInfo(string mimeType)
        {
            ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
            foreach (ImageCodecInfo codec in codecs)
            {
                if (codec.MimeType == mimeType)
                {
                    return codec;
                }
            }
            return null;
        }
    }
}

Replace "your-pdf-file.pdf" with the path to your PDF file. This code will create a TIFF file named Exported.tiff containing all the pages from the PDF document.

See Also

• Converting a PDF Document to a Multipage TIFF Image