title: Business rules implementation in MVC
body: <p>So after my first question about MVC and some answers from esteemed stackoverflow memebrs, I read a few books about MVC especially by Scott Alen.</p>
  
  <p>My question is that how do we implement show/hide controls, disable/enable controls based on user selection and particular value of field?</p>
  
  <p>Do we create seperate view for each case? In ASP.Net form and codebehind we could write as much logic as we wanted.</p>
  
  <p>Hope this example could clarify</p>
  
  <ol>
  <li>My business spec says if Carier is UnitedHealth then show 'diagnosis code field' but hide it when Carrier is BlueCross.</li>
  <li>Another example is, if user selects a particular value in listbox, hide certain fields.</li>
  </ol>
  
  <p>Thanks in Advance.</p>