title: C# Webform file upload with button postback not with POST
body: <p>I have a Webform(aspx) page.</p>
  
  <p>In it we basically have this form that we "post" when pressing a button, but in reality it is not a true httpPOST, it is actually just a postback onclick event on that button.
  Within that event we get all information we want like what the user has typed in the textfields and so on. Which by the way works great.</p>
  
  <p>But now I want to add a file uploader, more specifically an image uploader.</p>
  
  <p>Can I grab the file the user has uploaded to the input type file from codebehind within a button event click postback? not a httppost.</p>