title: How to save digital signature image or its byte[] in to database using itextsharp?
body: <p>I am working on a pdf form and it contains a digital signature field. When we click on the digital signature field it asks for selecting a valid signature and after that it asks to save the file.
  My requirement is to save the digital signature to db based on the user id.
  I have a button in the pdf form , when we click on that button it redirects to handler file. This handler class get the data in the form httpcontext. In this case, after submit the button all other fileds data reach the handler except the digital signature field.</p>
  
  <p>Is there any way to read the digital signature data to the handler ?</p>
  
  <p>Thanks in advance.</p>