title: How to Upload file onclick of button of type=button not type=submit in mvc4 using html begin form
body: <p>I have to upload a file using a button (of type button, not submit).</p>
  
  <p>And I want to show popup when no-file is selected and clicked on upload, it should not go to controller action.</p>
  
  <p>Can anyone help please?</p>