How to rotate a page 90 degrees?
Posted on StackOverflow on Nov 19, 2014 by Casey
Please take a look at the Rotate90Degrees example.
In this example, we use PdfReader
to get an instance of the document, and we change the /Rotate
value in every page dictionary (if there is no such entry, we add one with value 90):
PdfReader reader = new PdfReader(src);
int n = reader.getNumberOfPages();
PdfDictionary page;
PdfNumber rotate;
for (int p = 1; p
Once this is done, we use a PdfStamper
to persist the change:
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
stamper.close();
reader.close();
This is an iText example. If you want an iTextSharp example, you'll discover that it is very easy to port the Java to C# as the terminology is identical. You just need to change some lower cases into upper cases like this:
PdfDictionary page = reader.GetPageN(1);
page.Put(PdfName.ROTATE, new PdfNumber(90));