How to create a copy of a PDF file in ASP.NET MVC

Question

I'm reading a PDF file for writing a string on it like this :

public ActionResult Index(HttpPostedFileBase file)
{


    byte[] pdfbytes = null;
    BinaryReader rdr = new BinaryReader(file.InputStream);
    pdfbytes = rdr.ReadBytes((int)file.ContentLength);
    PdfReader myReader = new PdfReader(pdfbytes);

and I'm trying to pass a new file to FileStream like this :

FileStream fs = new FileStream(newFile, FileMode.Create, FileAccess.Write);

But I don't know how to pass the copied new file to fs object. Can you help me with that? Thanks.

Answer 1

Try this. This program copies all pdf files from one location to another.

protected void Button1_Click(object sender, EventArgs e)  
      {

    string sourceDirectory = @"D:\project training\source";

            string targetDirectory = @"D:\project training\destiny";

            Copy(sourceDirectory, targetDirectory);
        }
        public static void Copy(string sourceDirectory, string targetDirectory)
        {
            DirectoryInfo diSource = new DirectoryInfo(sourceDirectory);
            DirectoryInfo diTarget = new DirectoryInfo(targetDirectory);

            CopyAll(diSource, diTarget);
        }
        public static void CopyAll(DirectoryInfo source, DirectoryInfo target)
        {



            Directory.CreateDirectory(target.FullName);
            foreach (FileInfo fi in source.GetFiles())
            {
                if (fi.Extension.Equals(".pdf"))
                {
                    fi.CopyTo(Path.Combine(target.FullName, fi.Name), true);
                }
            }


            foreach (DirectoryInfo diSourceSubDir in source.GetDirectories())
            {
                DirectoryInfo nextTargetSubDir =
                    target.CreateSubdirectory(diSourceSubDir.Name);
                CopyAll(diSourceSubDir, nextTargetSubDir);
            }
        }

Answer 2

Here is example which is reading existing pdf file, copying it to new one and adding new string line:

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

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            string originalFile = "c:\\Users\\Admin\\Desktop\\receipt mod 3.pdf";
            string copyOfOriginal = "c:\\Users\\Admin\\Desktop\\newFile.pdf";

            using (var reader = new PdfReader(originalFile))
            {
                using (var fileStream = new FileStream(copyOfOriginal, FileMode.Create, FileAccess.Write))
                {
                    var document = new Document(reader.GetPageSizeWithRotation(1));
                    var writer = PdfWriter.GetInstance(document, fileStream);

                    document.Open();

                    for (var i = 1; i <= reader.NumberOfPages; i++)
                    {
                        document.NewPage();

                        var baseFont = BaseFont.CreateFont(BaseFont.HELVETICA_BOLD, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
                        var importedPage = writer.GetImportedPage(reader, i);

                        var contentByte = writer.DirectContent;
                        contentByte.BeginText();
                        contentByte.SetFontAndSize(baseFont, 12);

                        var LineString = "Hello World!";

                        contentByte.ShowTextAligned(10,LineString,50,50,0);

                        contentByte.EndText();
                        contentByte.AddTemplate(importedPage, 0, 0);
                    }

                    document.Close();
                    writer.Close();
                }
            }
        }
    }
}

Answer 3

If you have access to updated byte array pass it to File.WriteAllBytes. Or you might have an instance of PdfDocument or PdfWriter which usually allow saving the document to file on disk too. Hope it helps!