How to fill dynamic pdf form from any data source?

Type the document document1 = new Document(PageSize.A4.Rotate()) to below the previously entered type of code. This initiates a total PDF file and then just assigns it to the document variable. Type the PdfWriter.GetInstance type of document, new FileStream in myPDF.pdf, FileMode.Create after your previously entered text. This line of code causes the application to just create the actual PDF file which is using hard drive space. Type document to just close() after your previously entered code. This line of code is ensures the PDF file is just ended properly, and then prevents many type of coding errors.