title: Site-Wide Filters in ASP.NET MVC
body: <p>What is the best way to enable site-wide filters in an ASP.NET MVC application?</p>
  
  <p>To clarify, I have a form in my master page which has a drop down list =, the value of which filters every page on the site.  Each individual page also has it's own form elements.  I'd really rather not have a form element across the whole page (a la vanilla WebForms) but am having difficulty knowing what to call when the site-wide filter in the header is changed.</p>