C# - Pdf rotate using iTextSharp

In C#, with opensource iTextSharp can be find in nuget package, we can easily rotate each pdf pages and save as new file, use below code

using iTextSharp.text;

using iTextSharp.text.pdf;

using System.IO;

namespace PdfRotate

{

    class Program

    {

        static void Main(string[] args)

        {

            //INFO: Change input and ouput path here

            string pdfFilePath = @"C:\Files\sample.pdf";

            string outputPath = @" C:\Files\sampleoutput.pdf ";

            //INFO: Change rotate degree here to 90, 180 etc

            RotatePages(pdfFilePath, outputPath, 180);           

        }

        private static void RotatePages(string pdfFilePath, string outputPath, int rotateDegree)

        {

            PdfReader reader = new PdfReader(pdfFilePath);

            int pagesCount = reader.NumberOfPages;

            for (int n = 1; n <= pagesCount; n++)

            {

                PdfDictionary page = reader.GetPageN(n);

                PdfNumber rotate = page.GetAsNumber(PdfName.ROTATE);

                int rotation =

                        rotate == null ? rotateDegree : (rotate.IntValue + rotateDegree) % 360;

                page.Put(PdfName.ROTATE, new PdfNumber(rotation));

            }

            PdfStamper stamper = new PdfStamper(reader, new FileStream(outputPath, FileMode.Create));

            stamper.Close();

            reader.Close();

        }

    }

}

C# - Pdf split using iTextSharp

In C#, with opensource iTextSharp can be find in nuget package, we can easily split pdf into mulitple files per page. use below code

using iTextSharp.text;

using iTextSharp.text.pdf;

using System.IO;

namespace PdfSplit

{

    class Program

    {

    

    static void Main(string[] args)

       {

            string pdfFilePath = @"C:\Files\sample.pdf";

            string outputPath = @"C:\Files\";

            SplitPages(pdfFilePath, outputPath);

             }

    private static void SplitPages(string pdfFilePath, string outputPath)

        {

           // Intialize a new PdfReader instance with the contents of the source Pdf file:

            PdfReader reader = new PdfReader(pdfFilePath);

            FileInfo file = new FileInfo(pdfFilePath);

            string pdfFileName = file.Name.Substring(0, file.Name.LastIndexOf(".")) + "-";

            Program obj = new Program();

            int pageNameSuffix = 0;

            for (int pageNumber = 1; pageNumber <= reader.NumberOfPages; pageNumber++)

            {

                pageNameSuffix++;

                string newPdfFileName = string.Format(pdfFileName + "{0}", pageNameSuffix);

                obj.SplitAndSaveInterval(pdfFilePath, outputPath, pageNumber, newPdfFileName);

            }

        }

   private void SplitAndSaveInterval(string pdfFilePath, string outputPath, int pagenumber, string pdfFileName)

        {

            using (PdfReader reader = new PdfReader(pdfFilePath))

            {

                Document document = new Document();

                PdfCopy copy = new PdfCopy(document, new FileStream(outputPath + "\\" + pdfFileName + ".pdf", FileMode.Create));

                document.Open();

                copy.AddPage(copy.GetImportedPage(reader, pagenumber));

                document.Close();

            }

        }

    }
 }