Added new kb article convert-pdf-to-tiff-radpdfprocessing-net-core

knowledge-base/convert-pdf-to-tiff-radpdfprocessing-net-core.md

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+---
+title: Converting PDF to TIFF with RadPdfProcessing in .NET Core Applications
+description: This article demonstrates how to convert PDF documents to TIFF images in .NET Core applications using RadPdfProcessing.
+type: how-to
+page_title: How to Convert PDF Documents to TIFF Images Using RadPdfProcessing in .NET Core
+slug: convert-pdf-to-tiff-radpdfprocessing-net-core
+tags: radpdfprocessing, document processing, pdf, tiff, conversion, .net core, asp.net core
+res_type: kb
+ticketid: 1682497
+---
+
+## Environment
+
+| Version | Product | Author | 
+| ---- | ---- | ---- | 
+| 2025.1.205| RadPdfProcessing |[Desislava Yordanova](https://www.telerik.com/blogs/author/desislava-yordanova)| 
+
+## Description
+
+I need to convert PDFs to TIFFs in a .NET 8 ASP.NET Core application. The existing solutions seem to target the .NET Framework, causing compatibility issues. How can I achieve this conversion using RadPdfProcessing in my application?
+
+This knowledge base article also answers the following questions:
+- How do I convert PDF documents to TIFF format in a .NET Core application?
+- What is the process for exporting PDF pages as images in .NET Core?
+- Can I generate a multipage TIFF image from a PDF document using RadPdfProcessing in ASP.NET Core?
+
+## Solution
+
+To convert PDF documents to TIFF images in a .NET Core application, 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 multipage TIFF file.
+
+Here's an example code snippet demonstrating the process:
+
+```csharp
+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
+
+- [RadPdfProcessing Overview](https://docs.telerik.com/devtools/document-processing/libraries/radpdfprocessing/overview)
+- [Using Image Format Provider](https://docs.telerik.com/devtools/document-processing/libraries/radpdfprocessing/formats-and-conversion/convert-to-image/using-image-format-provider)
+- [PdfProcessing: Add support for converting a PDF document to a multipage TIFF image](https://feedback.telerik.com/document-processing/1660559-pdfprocessing-add-support-for-converting-a-pdf-document-to-a-multipage-tiff-image)
+
+---