Convert PDF to Image Batch
- by tro
I am working on a solution where I can convert pdf files to images.
I am using the following example from codeproject:
http://www.codeproject.com/Articles/317700/Convert-a-PDF-into-a-series-of-images-using-Csharp?msg=4134859#xx4134859xx
now I tried with the following code to generate from more then 1000 pdf files new images:
using Cyotek.GhostScript;
using Cyotek.GhostScript.PdfConversion;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace RefClass_PDF2Image
{
class Program
{
static void Main(string[] args)
{
string outputPath = Properties.Settings.Default.outputPath;
string pdfPath = Properties.Settings.Default.pdfPath;
if (!Directory.Exists(outputPath))
{
Console.WriteLine("Der angegebene Pfad " + outputPath + " für den Export wurde nicht gefunden. Bitte ändern Sie den Pfad (outputPath) in der App.Config Datei.");
return;
}
else
{
Console.WriteLine("Output Pfad: " + outputPath + " gefunden.");
}
if (!Directory.Exists(pdfPath))
{
Console.WriteLine("Der angegebene Pfad " + pdfPath + " zu den PDF Zeichnungen wurde nicht gefunden. Bitte ändern Sie den Pfad (pdfPath) in der App.Config Datei.");
return;
}
else
{
Console.WriteLine("PDF Pfad: " + pdfPath + " gefunden.");
}
Pdf2ImageSettings settings = GetPDFSettings();
DateTime start = DateTime.Now;
TimeSpan span;
Console.WriteLine("");
Console.WriteLine("Extraktion der PDF Zeichnungen wird gestartet: " + start.ToShortTimeString());
Console.WriteLine("");
DirectoryInfo diretoryInfo = new DirectoryInfo(pdfPath);
DirectoryInfo[] directories = diretoryInfo.GetDirectories();
Console.WriteLine("");
Console.WriteLine("Es wurden " + directories.Length + " verschiedende Verzeichnisse gefunden.");
Console.WriteLine("");
List<string> filenamesPDF = Directory.GetFiles(pdfPath, "*.pdf*", SearchOption.AllDirectories).Select(x => Path.GetFullPath(x)).ToList();
List<string> filenamesOutput = Directory.GetFiles(outputPath, "*.*", SearchOption.AllDirectories).Select(x => Path.GetFullPath(x)).ToList();
Console.WriteLine("");
Console.WriteLine("Es wurden " + filenamesPDF.Count + " verschiedende PDF Zeichnungen gefunden.");
Console.WriteLine("");
List<string> newFileNames = new List<string>();
int cutLength = pdfPath.Length;
for (int i = 0; i < filenamesPDF.Count; i++)
{
string temp = filenamesPDF[i].Remove(0, cutLength);
temp = outputPath + temp;
temp = temp.Replace("pdf", "jpg");
newFileNames.Add(temp);
}
for (int i = 0; i < filenamesPDF.Count; i++)
{
FileInfo fi = new FileInfo(newFileNames[i]);
if (!fi.Exists)
{
if (!Directory.Exists(fi.DirectoryName))
{
Directory.CreateDirectory(fi.DirectoryName);
}
Bitmap firstPage = new Pdf2Image(filenamesPDF[i], settings).GetImage();
firstPage.Save(newFileNames[i], System.Drawing.Imaging.ImageFormat.Jpeg);
firstPage.Dispose();
}
//if (i % 20 == 0)
//{
// GC.Collect();
// GC.WaitForPendingFinalizers();
//}
}
Console.ReadLine();
}
private static Pdf2ImageSettings GetPDFSettings()
{
Pdf2ImageSettings settings;
settings = new Pdf2ImageSettings();
settings.AntiAliasMode = AntiAliasMode.Medium;
settings.Dpi = 150;
settings.GridFitMode = GridFitMode.Topological;
settings.ImageFormat = ImageFormat.Png24;
settings.TrimMode = PdfTrimMode.CropBox;
return settings;
}
}
}
unfortunately, I always get in the Pdf2Image.cs an out of memory exception. here the code:
public Bitmap GetImage(int pageNumber)
{
Bitmap result;
string workFile;
//if (pageNumber < 1 || pageNumber > this.PageCount)
// throw new ArgumentException("Page number is out of bounds", "pageNumber");
if (pageNumber < 1)
throw new ArgumentException("Page number is out of bounds", "pageNumber");
workFile = Path.GetTempFileName();
try
{
this.ConvertPdfPageToImage(workFile, pageNumber);
using (FileStream stream = new FileStream(workFile, FileMode.Open, FileAccess.Read))
{
result = new Bitmap(stream); // --->>> here is the out of memory exception
stream.Close();
stream.Dispose();
}
}
finally
{
File.Delete(workFile);
}
return result;
}
how can I fix that to avoid this exception?
thanks for any help,
tro
