Combine TIFF files on a multi-page TIFF C#

Question

I’m making a program to convert and concatenate files. I wanted, after converting the PDF files into TIFF, to combine them into a single multi-page TIFF file.

I’ve been looking for a long time and I still haven’t found any code that worked like I wanted.

Then I convert the PDF files to TIFF and store them in a temporary folder. Then I have an array of strings that will contain all these files from the temporary folder (through a function GetFiles()).

I want you to combine the files from that array into a single multi-page TIFF. Someone has the solution or can direct me to it?

EDIT - My code:

Convert PDF to TIFF (with Imagemagick)

public void PDFToTIFF(string output)
{
    MagickReadSettings settings = new MagickReadSettings();          
    settings.Density = new Density(500);

    string[] ficheiros = GetFiles();
    foreach (string fich in ficheiros)
    {
        string fichwithout = Path.GetFileNameWithoutExtension(fich);
        string path = Path.Combine(output, fichwithout);
        using (MagickImageCollection images = new MagickImageCollection())
        {
            images.Read(fich);
            foreach (MagickImage image in images)
            {
                settings.Height = image.Height;
                settings.Width = image.Width;
                image.Format = MagickFormat.Tiff;
                image.Write(path + ".tiff");
            }
        }
     }
 }

Function GetFiles():

 public string[] GetFiles()
 {
     if (!Directory.Exists(@"C:\Users\srodrigues\Documents\ProjetoPAP-SofiaRodrigues\Main\temporario"))
     {

         Directory.CreateDirectory(@"C:\Users\srodrigues\Documents\ProjetoPAP-SofiaRodrigues\Main\temporario");
     }

     DirectoryInfo dirInfo = new DirectoryInfo(@"C:\Users\srodrigues\Documents\ProjetoPAP-SofiaRodrigues\Main\temporario");
     FileInfo[] fileInfos = dirInfo.GetFiles("*.pdf");
     ArrayList list = new ArrayList();
     foreach (FileInfo info in fileInfos)
     {
         if(info.Name != caminho1)
         {
             // HACK: Just skip the protected samples file...
             if (info.Name.IndexOf("protected") == -1)
             list.Add(info.FullName);
         }
     }
     return (string[])list.ToArray(typeof(string));
  }

Thanks in advance.

Answer 1

To merge TIFF files into a multi-page TIFF, no reference or some library and third parties are required, just use this function.

I removed the function of this site: Split/Merge TIFF

using System.Collections;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;

public void mergeTiffPages(string str_DestinationPath)
{
    string[] sourceFiles = GetFiles(); //deve criar uma, tenho o exemplo no código da minha questão
    ImageCodecInfo codec = null;

    foreach (System.Drawing.Imaging.ImageCodecInfo cCodec in System.Drawing.Imaging.ImageCodecInfo.GetImageEncoders())
    {
        if (cCodec.CodecName == "Built-in TIFF Codec")
        codec = cCodec;
    }
    foreach (string file in sourceFiles)//para cada ficheiro no array de strings
    {
        try
        {
            EncoderParameters imagePararms = new EncoderParameters(1);
            imagePararms.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.MultiFrame);

             if (sourceFiles.Length == 1)
             {
                 File.Copy((string)sourceFiles[0], str_DestinationPath, true);
             }
             else if (sourceFiles.Length > 2)
             {
                 using (System.Drawing.Image DestinationImage = (System.Drawing.Image)(new Bitmap((string)sourceFiles[0])))
                 {
                     DestinationImage.Save(str_DestinationPath, codec, imagePararms); 
                     imagePararms.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.FrameDimensionPage);

                      for (int i = 1; i < sourceFiles.Length; i++)
                      {
                           System.Drawing.Image img = (System.Drawing.Image)(new Bitmap((string)sourceFiles[i]));

                           DestinationImage.SaveAdd(img, imagePararms);
                           img.Dispose();
                       }

                       imagePararms.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.Flush);
                       DestinationImage.SaveAdd(imagePararms);
                       imagePararms.Dispose();
                       DestinationImage.Dispose();
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString(), "Erro", MessageBoxButtons.OK);
            }
        }
    }