If it were me today I would do your second process in Itext7 so that you could save the PDF page in its original format (rotated, of course). Sorry, I have no handy code for that, but it *should* be straight forward. As I stated earlier though, there is a learning curve on Itext7 and all of their help is geared toward selling licensing. I understand their need, but it somewhat burdens the journey to get the information you need. 

Thanks for sharing your code, what part of my application is trying to achieve is to simply allow the user open a pdf in the viewer, navigate to a page, rotate it as required and then press a button to export that page as an image.

As the viewer component itself is not capable of exporting a rotated page I'm getting the current page being viewed and its rotation state, closing the pdf viewer then opening the pdf document, deleting all pages except the one I want and then rotating  it by the appropriate amount then exporting it to a file as an image. When the original PDF is type 3 its the export that throws the exception.

I'm not aware of an easier way to do this given the existing functionality of the existing components.

Any ideas ?

Toby, for my work around I only need to add a Type 3 to a newly created PDF. For that I'm using iText7 which comes with a learning curve. Here is my combine files method.

using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

using iText.Kernel.Pdf;
using iText.Kernel.Utils;

    public static class PdfCombineFiles
    {
        public static bool MergePdfs(IEnumerable<string> fileNames, string targetPdf, ref string msg)
        {
            try
            {
                var sb = new StringBuilder();
                var merged = true;
                using var stream = new FileStream(targetPdf, FileMode.Create);
                var doc = new PdfDocument(new PdfWriter(stream));

                try
                {
                    var merger = new PdfMerger(doc);

                    foreach (var file in fileNames)
                    {
                        if (File.Exists(file))
                        {
                            var sourcePdf = new PdfDocument(new PdfReader(file));
                            merger.Merge(sourcePdf, 1, sourcePdf.GetNumberOfPages());
                            sourcePdf.Close();
                        }
                        else
                        {
                            merged = false;
                            sb.AppendLine(file + " does not exist.");
                        }
                    }
                }
                catch (Exception ex)
                {
                    sb.AppendLine(ex.Message);
                    merged = false;
                }
                finally
                {
                    doc.Close();
                    msg += sb.ToString();
                }

                var length = new FileInfo(targetPdf).Length;
                if (length != 0) return merged;

                try
                {
                    File.Delete(targetPdf);
                }
                catch (Exception e)
                {
                    msg += $"Empty File was created, error trying to delete {e.Message} \t" + Environment.NewLine;
                }
                msg += "Unknown error file created was empty.  \t" + Environment.NewLine;
                return false;
            }
            catch (Exception e)
            {
                msg += e.Message;
                return false;
            }
        }
    }

 

I too have just had this exact same problem reported to me by some users. In my case the exception thrown was GetItalicAngle is not supported by Type3FontSource, which is called internally when I perform an Export.

@Telerik - when will this get implemented / supported?

@ Anyone else - is there a workaround or can anyone suggest another PDF viewer component for C# which works and ideally has the ability to save rotated pages from the viewer ?

 

 

Having to pay and to implement second library like PDFSharp because Telerik doesn't support Type 3 font pdf processing is really inconvenient.

We waited now 1 year for this feature, and it is still not available.

 

How much votes does this need that it gets scheduled for implementation?

Is there a timeline yet for the type 3 export support?