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);
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