CODEWITHSUNDEEP
c#pdfitextghostscript
Ben Walker
Ben Walker

Reputation: 2137

Remove PDF page breaks

How can I remove page breaks from a pdf, so the output would be a single 'page' PDF? So if a normal page is 400x900 and I have 4 pages, a resulting file would be 1600x900. I previously did this for Tif files (Remove page breaks in multi-page tif to make one long page), but would like to do it with PDF. Could I possibly convert to ps, remove whatever code means 'page break', then convert back to pdf?

Upvotes: 1

Views: 3797

Answers (2)

Milne
Milne

Reputation: 848

This can be done in the iTextSharp library by using a single columned PdfTable and dynamically changing the size of the document dependent upon the number of pages.

You'll of course need a few references to the iTextSharp DLL found here 

using iTextSharp.text;
using iTextSharp.text.pdf;
using System.IO;

Here's a simple example:

public static void MergePages()
{
    using (PdfReader reader = new PdfReader(@"C:\Users\cmilne\Desktop\AA0081913.pdf"))//Original PDF containing page breaks. 
    {
        int pages = reader.NumberOfPages;
        float postProcessPageHeight = 0;
        float postProcessPageWidth = 0;
        for (int p = 1; p <= bill.PageCount; p++)
        {
            var size = bill.PdfReader.GetPageSize(p);
            postProcessPageHeight += (size.Height);
            if (size.Width > postProcessPageWidth)
                postProcessPageWidth = (size.Width);
        }

        var rect = new Rectangle(postProcessPageWidth, postProcessPageHeight);

        using (Document document = new Document(rect, 0, 0, 0, 0)) 
        { 
            PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(@"C:\Users\cmilne\Desktop\AA0081913_NEW.pdf", FileMode.Create)); //Declare location\name of new PDF not containing page breaks.

            document.Open();
            PdfImportedPage page;
            PdfPTable table = new PdfPTable(1);
            table.WidthPercentage = 100;

            for (int i = 1; i <= pages; i++)
            {
                page = writer.GetImportedPage(reader, i);
                table.AddCell(iTextSharp.text.Image.GetInstance(page));
            }
            document.Add(table);
            document.Close(); 
        }
    }
}

The ending page size must be smaller than 14400 by 14400. (This is all that iTextSharp allows) An 8 1/2 x 11 PDF at a common resolution would make the max about 18 pages.

Upvotes: 4

JNYRanger
JNYRanger

Reputation: 7097

Use the iTextSharp C# library. It gives you a lot of options to manipulate PDFs. I've used it before when I had to write an import application for a closed-source document repository. It worked like a charm. The only downside is their documentation is kind of spotty because they want you to purchase their book. You can browser their Java API though for free since its almost identical to the C#, and just play around with it to find the C# version.

iText: http://itextpdf.com/

Upvotes: 1

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