Convert PDF to Word in Multi-thread mode using C# and .NET


This Console Application shows how to convert numerous PDF documents into DOCX using multithread mode. The each conversion will be done in the own thread.

Complete code

using System;
using System.IO;
using System.Collections.Generic;
using System.Threading;
using SautinSoft;

namespace Sample
{
    class Sample
    {
        static void Main(string[] args)
        {
            ConvertPdfToWordInThread();
        }
        public class TArgument
        {
            public string PdfFile { get; set; }
            public int PageNumber { get; set; }
        }
        public static void ConvertPdfToWordInThread()
        {
            string pdfs = Path.GetFullPath(@"..\..\..\");
            string[] files = Directory.GetFiles(pdfs, "*.pdf");

            List<Thread> threads = new List<Thread>();
            for (int i = 0; i < files.Length; i++)
            {
                TArgument targ = new TArgument()
                {
                    PdfFile = files[i],
                    PageNumber = 1
                };

                var t = new Thread((a) => ConvertToWord(a));
                t.Start(targ);
                threads.Add(t);
            }

            foreach (var thread in threads)
                thread.Join();
            Console.WriteLine("Done!");
        }

        public static void ConvertToWord(object targ)
        {
            // Before starting, we recommend to get a free key:
            // https://sautinsoft.com/start-for-free/
            
            // Apply the key here:
            // SautinSoft.PdfFocus.SetLicense("...");
			
            TArgument targum = (TArgument)targ;
            string pdfFile = targum.PdfFile;
            int page = targum.PageNumber;

            string docxFile = Path.GetFileNameWithoutExtension(pdfFile) + ".docx";
			
            SautinSoft.PdfFocus f = new SautinSoft.PdfFocus();

            f.WordOptions.Format = PdfFocus.CWordOptions.eWordDocument.Docx;
            f.WordOptions.RenderMode = PdfFocus.CWordOptions.eRenderMode.Flowing;

            f.OpenPdf(pdfFile);

            bool done = false;

            if (f.PageCount > 0)
            {
                if (page >= f.PageCount)
                    page = 1;

                if (f.ToWord(docxFile, page, page) == 0)
                    done = true;
                f.ClosePdf();
            }

            if (done)
            {
                Console.WriteLine("{0}\t - Done!", Path.GetFileName(pdfFile));
                System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(docxFile) { UseShellExecute = true });
            }
            else
                Console.WriteLine("{0}\t - Error!", Path.GetFileName(pdfFile));
        }
    }
}

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Imports System.IO
Imports System.Drawing.Imaging
Imports System.Collections.Generic
Imports System.Threading
Imports SautinSoft

Module Sample

    Sub Main()
        ' Before starting, we recommend to get a free key:
        ' https://sautinsoft.com/start-for-free/

        ' Apply the key here
        ' SautinSoft.PdfFocus.SetLicense("...");

        ConvertPdfToWordInThread()
    End Sub
    Public Class TArgument
        Public Property PdfFile() As String
        Public Property PageNumber() As Integer
    End Class
    Public Sub ConvertPdfToWordInThread()
        Dim pdfs As String = Path.GetFullPath("..\..\..\")
        Dim files() As String = Directory.GetFiles(pdfs, "*.pdf")

        Dim threads As New List(Of Thread)()
        For i As Integer = 0 To files.Length - 1
            Dim targ As New TArgument() With {
                    .PdfFile = files(i),
                    .PageNumber = 1
                }

            Dim t = New Thread(Sub(a) ConvertToWord(a))
            t.Start(targ)
            threads.Add(t)
        Next i

        For Each t As Thread In threads
            t.Join()
        Next t
        Console.WriteLine("Done!")
    End Sub

    Public Sub ConvertToWord(ByVal targ As Object)
        Dim targum As TArgument = DirectCast(targ, TArgument)
        Dim pdfFile As String = targum.PdfFile
        Dim page As Integer = targum.PageNumber

        Dim docxFile As String = Path.GetFileNameWithoutExtension(pdfFile) + ".docx"
		
        Dim f As New SautinSoft.PdfFocus()

        f.WordOptions.Format = PdfFocus.CWordOptions.eWordDocument.Docx
        f.WordOptions.RenderMode = PdfFocus.CWordOptions.eRenderMode.Flowing

        f.OpenPdf(pdfFile)

        Dim done As Boolean = False

        If f.PageCount > 0 Then
            If page >= f.PageCount Then
                page = 1
            End If

            If f.ToWord(docxFile, page, page) = 0 Then
                done = True
            End If
            f.ClosePdf()
        End If

        If done Then
            Console.WriteLine("{0}" & ControlChars.Tab & " - Done!", Path.GetFileName(pdfFile))
            System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(docxFile) With {.UseShellExecute = True})
        Else
            Console.WriteLine("{0}" & ControlChars.Tab & " - Error!", Path.GetFileName(pdfFile))
        End If
    End Sub
End Module

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