PDF OR Document To Print in MVC Web application

Your question is about many different tools, but this is the answer in case you are using iTextSharp.

When you create a PDF from scratch using iTextSharp, you always need a Document and a PdfWriter class. The Document class is to be used for the high-level functionality; the PdfWriter class for the low-level operations.

The page size is defined at the Document level. You can create a new Document object like this:

Document document = new Document(); 

As we didn't pass any parameters to the constructor, iTextSharp will create a PDF using the default page size (A4) and margins of half an inch.

This is the equivalent of:

Document document = new Document(PageSize.A4, 36, 36, 36, 36); 

As you can see: I use 36 as value for half an inch, because 1 inch = 72 user units in PDF.

If you want to define another page size, you can do so by using one of the other values available in the PageSize class, for instance:

Document document = new Document(PageSize.LETTER); 

PageSize.A4 and PageSize.LETTER are instances of the Rectangle class, so if you need a page size that isn't defined in PageSize, then you can create your own rectangle. For instance:

Rectangle envelope = new Rectangle(432, 252); Document document = new Document(envelope, 0, 0, 0, 0); 

Where do these values come from? Let's do the Math:

6 inch x 72 points = 432 points (the width) 3.5 inch x 252 points = 252 points (the height) 

This is how you define pages with a custom size.