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Powerful all-in-one PDF library for .NET

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Home » Newsletter » October 2008

By L. Santhanam

This is the PDFOne .NET version of an older PDFOne Java article. In that article, we said:

Many companies send their bills as PDF documents. In most cases, the most useful part of the document is just the bill but unfortunately it will be buried under a whole lot of other pages.

Using PDFOne Java, we can just read the document, take a snap of the page where the bill is located, and save it as an image. This way the images will contain just the bills. Finding the bills in these images will be easier than opening the actual PDF documents.

In this article, we will see how to do the same in .NET. Here is the code snippet.

using System;
using System.Drawing;
using System.Drawing.Imaging;
using Gnostice.PDFOne;

class PDF2Image {
 static void Main(string[] args){
  // Load a PDF document
  PDFDocument doc = new PDFDocument();
  doc.Load("input_doc.pdf");

  // Get first page as a metafile
  Metafile Metafile1 = doc.GetPageMetafile(1);

  // Save the metafile as a JPEG image
  Metafile1.Save("FirstPageImage.jpg", ImageFormat.Jpeg);

  // Save a thumbnail of the JPEG image 
  Image Image1 
     = Metafile1.GetThumbnailImage(100, 100, null, IntPtr.Zero);
  Image1.Save("FirstPageImageThumb.gif", ImageFormat.Gif);

  // Dispose the meta file
  Metafile1.Dispose();

  // Close the PDF document
  doc.Close();
 }
}

Here is that PDF file that we usually use to demonstrate the capability of our document creation product for the Delphi/C++Builder market, Gnostice eDocEngine VCL. In this case, we used it as input for PDFOne .NET.

And, here is the captured image.