Auto Convert Files in a Folder Using C# / PDF Printer

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using pdf7.PdfWriter;
using System.Reflection;

namespace Converter
{
    class Program
    {
        static void Main(string[] args)
        {
            string applicationFolder = 
                new Uri(Path.GetDirectoryName(Assembly.GetAssembly(typeof(Program)).CodeBase)).LocalPath;
            string inputFolder = Path.Combine(applicationFolder, "input");
            string outputFolder = Path.Combine(applicationFolder, "output");
            string doneFolder = Path.Combine(applicationFolder, "done");
            string errorFolder = Path.Combine(applicationFolder, "errors");

            // Check that folders exist
            if (!Directory.Exists(inputFolder)) Directory.CreateDirectory(inputFolder);
            if (!Directory.Exists(outputFolder)) Directory.CreateDirectory(outputFolder);
            if (!Directory.Exists(doneFolder)) Directory.CreateDirectory(doneFolder);
            if (!Directory.Exists(errorFolder)) Directory.CreateDirectory(errorFolder);

            // Get the printer name
            string printerName = PdfUtil.DefaultPrinterName;

            // Get file names from input folder
            string[] inputFileNames = Directory.GetFiles(inputFolder);

            foreach (string inputFileName in inputFileNames)
            {
                bool isError = false;
                string errorMessage = null;

                Console.Write(string.Format("Printing {0}... ", Path.GetFileName(inputFileName)));

                string outputFileName = 
                    Path.Combine(outputFolder, Path.GetFileName(inputFileName) + ".pdf");
                PdfSettings settings = new PdfSettings();
                settings.PrinterName = printerName;

                // Set the output file name
                settings.SetValue("Output", outputFileName); 

                // Disable all dialogs
                settings.SetValue("ShowSettings", "never");
                settings.SetValue("ShowSaveAS", "never");
                settings.SetValue("ShowProgress", "no");
                settings.SetValue("ShowProgressFinished", "no");
                settings.SetValue("ShowPDF", "no");
                settings.SetValue("ConfirmOverwrite", "no");

                // Get the name of a status file and delete it if it already exist
                string statusFileName = Path.Combine(Path.GetTempPath(), "converter_status.ini");
                if (File.Exists(statusFileName))
                    File.Delete(statusFileName);

                // Make the printer write a status file
                settings.SetValue("StatusFile", statusFileName);

                // Write the settings to the printer
                settings.WriteSettings(PdfSettingsFileType.RunOnce);

                try
                {
                    // Print the file using the associated program for the specific file type
                    PdfUtil.PrintFile(inputFileName, printerName);

                    // Wait for the status file to appear. This means that the print has finished
                    PdfUtil.WaitForFile(statusFileName, 60000);

                    // Check if output file exists
                    isError = !File.Exists(outputFileName);
                }
                catch (Exception ex)
                {
                    isError = true;
                    errorMessage = ex.Message;
                }

                // Move the input file
                if (isError)
                    File.Move(inputFileName, Path.Combine(errorFolder, Path.GetFileName(inputFileName)));
                else
                    File.Move(inputFileName, Path.Combine(doneFolder, Path.GetFileName(inputFileName)));

                // Write a status
                if (isError)
                {
                    if (string.IsNullOrEmpty(errorMessage))
                        Console.WriteLine("Error");
                    else
                        Console.WriteLine(errorMessage);
                }
                else
                    Console.WriteLine("Done");
            }
        }
    }
}