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This sample shows how to produce a booklet by placing two pages of an existing document on one landscape orientated page of a new document (e. g. for duplex printing).

PDF Output File

See the PDF file created by this sample: output.pdf (36 kB)

Source Code

Here is the code that does the work:
// Create the output document
PdfDocument outputDocument = new PdfDocument();
 
// Show single pages
// (Note: one page contains two pages from the source document.
//  If the number of pages of the source document can not be
//  divided by 4, the first pages of the output document will
//  each contain only one page from the source document.)
outputDocument.PageLayout = PdfPageLayout.SinglePage;
 
XGraphics gfx;
 
// Open the external document as XPdfForm object
XPdfForm form = XPdfForm.FromFile(filename);
// Determine width and height
double extWidth = form.PixelWidth;
double extHeight = form.PixelHeight;
 
int inputPages = form.PageCount;
int sheets = inputPages / 4;
if (sheets * 4 < inputPages)
  sheets += 1;
int allpages = 4 * sheets;
int vacats = allpages - inputPages;
 
for (int idx = 1; idx <= sheets; idx += 1)
{
  // Front page of a sheet:
  // Add a new page to the output document
  PdfPage page = outputDocument.AddPage();
  page.Orientation = PageOrientation.Landscape;
  page.Width = 2 * extWidth;
  page.Height = extHeight;
  double width = page.Width;
  double height = page.Height;
 
  gfx = XGraphics.FromPdfPage(page);
 
  // Skip if left side has to remain blank
  XRect box;
  if (vacats > 0)
    vacats -= 1;
  else
  {
    // Set page number (which is one-based) for left side
    form.PageNumber = allpages + 2 * (1 - idx);
    box = new XRect(0, 0, width / 2, height);
    // Draw the page identified by the page number like an image
    gfx.DrawImage(form, box);
  }
 
  // Set page number (which is one-based) for right side
  form.PageNumber = 2 * idx - 1;
  box = new XRect(width / 2, 0, width / 2, height);
  // Draw the page identified by the page number like an image
  gfx.DrawImage(form, box);
 
  // Back page of a sheet
  page = outputDocument.AddPage();
  page.Orientation = PageOrientation.Landscape;
  page.Width = 2 * extWidth;
  page.Height = extHeight;
 
  gfx = XGraphics.FromPdfPage(page);
 
  // Set page number (which is one-based) for left side
  form.PageNumber = 2 * idx;
  box = new XRect(0, 0, width / 2, height);
  // Draw the page identified by the page number like an image
  gfx.DrawImage(form, box);
 
  // Skip if right side has to remain blank
  if (vacats > 0)
    vacats -= 1;
  else
  {
    // Set page number (which is one-based) for right side
    form.PageNumber = allpages + 1 - 2 * idx;
    box = new XRect(width / 2, 0, width / 2, height);
    // Draw the page identified by the page number like an image
    gfx.DrawImage(form, box);
  }
}
 
// Save the document...
filename = "Booklet.pdf";
outputDocument.Save(filename);
// ...and start a viewer.
Process.Start(filename);

Note: The samples on this site usually show and discuss code snippets only. The complete source code of the samples with solutions for Visual Studio is available from the download area on CodePlex.


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