Rotating PDF in C# using iTextSharp

Question

I am using the below function to split the pdf into two.

Though it is spliting the pdf, the content is appearing upside down. How do I rotate it by 180 degrees.

Answer 1

A little change in above code old code

case 270:
    writer.DirectContent.AddTemplate(importedPage, 0, 1f, -1f, 0, pageWidth, 0);

new code

case 270:
    writer.DirectContent.AddTemplate(importedPage, 0, 1f, -1f, 0, pageHeight, 0);

This will fix the issue with 270 degree rotation