Extract Pages from a PDF Using Scriptcs
Today I needed to extract some pages from a large PDF file. One way of doing this would be to pay for a commercial PDF app (free versions don’t have this feature).
I discovered a much nicer way.
scriptcs -install iTextSharp- Save this method in
ExtractPages.csx(shown at the bottom of this post) scriptcs#load "ExtractPages.csx"ExtractPages(@"C:\big.pdf", @"C:\small.pdf", 1, 3);(pages 1-3)
Job done! scriptcs FTW.
Thanks to David Christiansen for recommending iTextSharp over at JabbR.
// ExtractPages.csx
// from http://www.jamesewelch.com/2008/11/14/how-to-extract-pages-from-a-pdf-document/
using iTextSharp.text;
using iTextSharp.text.pdf;
public static void ExtractPages(string inputFile, string outputFile,
int start, int end)
{
// get input document
PdfReader inputPdf = new PdfReader(inputFile);
// retrieve the total number of pages
int pageCount = inputPdf.NumberOfPages;
if (end < start || end > pageCount)
{
end = pageCount;
}
// load the input document
Document inputDoc =
new Document(inputPdf.GetPageSizeWithRotation(1));
// create the filestream
using (FileStream fs = new FileStream(outputFile, FileMode.Create))
{
// create the output writer
PdfWriter outputWriter = PdfWriter.GetInstance(inputDoc, fs);
inputDoc.Open();
PdfContentByte cb1 = outputWriter.DirectContent;
// copy pages from input to output document
for (int i = start; i <= end; i++)
{
inputDoc.SetPageSize(inputPdf.GetPageSizeWithRotation(i));
inputDoc.NewPage();
PdfImportedPage page =
outputWriter.GetImportedPage(inputPdf, i);
int rotation = inputPdf.GetPageRotation(i);
if (rotation == 90 || rotation == 270)
{
cb1.AddTemplate(page, 0, -1f, 1f, 0, 0,
inputPdf.GetPageSizeWithRotation(i).Height);
}
else
{
cb1.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
}
}
inputDoc.Close();
}
}