Split large PDF file in to multiple pdfs in C#-CodePudding

I have a large pdf file which I need to split into multiple pdfs or chunks before I upload to the server(another wcf service). I have two approaches to send large files(>2 MB) to server by splitting them multiple pdfs or one pdf into chunks .Can any one tell me this how to achieve ? I found the articles using iTextSharp but it's deprecated one. I don't use licensed one. Do we have any feasible way to achieve this ?

I have followed the following article .But they have used iTextshap which is a deprecated one . https://www.c-sharpcorner.com/article/splitting-pdf-file-in-c-sharp-using-itextsharp/

CodePudding user response：

using PdfSharp.Pdf;
using PdfSharp.Pdf.IO;
using System.IO;


class Program
{
    // Output Folder
    static string outputFolder = @"D:\PDFSplit\Example\outputFolder";

    static void Main(string[] args)
    {
        // Input Folder
        var inputFolder = @"D:\PDFSplit\Example\inputFolder";           

        // Input File name
        var inputPDFFileName = "sample.pdf";

        // Input file path
        string inputPDFFilePath = Path.Combine(inputFolder, inputPDFFileName);

        // Open the input file in Import Mode
        PdfDocument inputPDFFile = PdfReader.Open(inputPDFFilePath, PdfDocumentOpenMode.Import);

        //Get the total pages in the PDF
        var totalPagesInInputPDFFile = inputPDFFile.PageCount;

        while(totalPagesInInputPDFFile !=0)
        {
            //Create an instance of the PDF document in memory
            PdfDocument outputPDFDocument = new PdfDocument();
           
            // Add a specific page to the PdfDocument instance
            outputPDFDocument.AddPage(inputPDFFile.Pages[totalPagesInInputPDFFile-1]);

            //save the PDF document
            SaveOutputPDF(outputPDFDocument, totalPagesInInputPDFFile);
            
            totalPagesInInputPDFFile--;
        }           
    }

    private static void SaveOutputPDF(PdfDocument outputPDFDocument,int pageNo)
    {
        // Output file path
        string outputPDFFilePath = Path.Combine(outputFolder, pageNo.ToString()   ".pdf"); 

        //Save the document
        outputPDFDocument.Save(outputPDFFilePath);
    }
}

CodePudding user response：

Try using streams, for instance StreamReader.

See meatvest's answer here

And the docs