title: Editing PDF document online and save in the database using ASP.NET
body: <p>I have a PDF document storted as binary in the SQL Server database. I have rendered the binary document as PDF inside an iFrame using HTTP Handler. </p>
  
  <p>Now, I want to allow the users to edit the data in the PDF file shown inside the iFrame and also populate some of the fields in the PDF automatically on clicking a button.</p>
  
  <p>After all the fields are populated, the filled PDF document in the iFrame should be saved back as binary in the database.</p>
  
  <p>How can this be implemented using ASP.NET 4.0?</p>