Splitting a PDF into Multiple Documents using Barcodes

         BarcodeEngine engine = new BarcodeEngine();

         barcodeReader = engine.Reader;

         codecs.Options.Load.AllPages = true;
         RasterImage loadedImage = codecs.Load(@"Leadtools.pdf");
         List<RasterImage> docSections = new List<RasterImage>();

         // seed the initial documentSection with the first page of the document
         RasterImage img = loadedImage.Clone();

         // remove the first page since it's been seeded
         loadedImage.RemovePageAt(1);

         while (loadedImage.PageCount > 0)
         {
            BarcodeData[] data = barcodeReader.ReadBarcodes(rasterImage, Leadtools.Forms.LogicalRectangle.Empty, 0, new BarcodeSymbology[] { BarcodeSymbology.PatchCode });

	    bool isPatchPage = data.Length > 0;
	    
            // if we're on a patch page, finalize the current page range and begin a new one
            if (isPatchPage)
            {
               docSections.Add(img.CloneAll());

               loadedImage.RemovePageAt(1);
               img = loadedImage.Clone();

               loadedImage.RemovePageAt(1);
            }
            else // otherwise, add this page
            {
               img.AddPage(loadedImage);
            }
         }

         // add the lastly-created page
         docSections.Add(img);