title: Passing variable from view to the controller without query string
body: <p>I'm fairly sure I'm missing something very practical but I'm floundering at finding it online.</p>
  
  <p><strong>How do you pass information from the view to the controller without using URL items (query strings, /variable/ etc?</strong></p>
  
  <p>The easiest scenario I can think that surely must have an example is a simple set of login credentials handed to a controller. Naturally you wouldn't want the username / password to be viewable in the URL.</p>