title: angular event doesn't update page
body: <p>I'm converting a page in a mvc application with a lot of inline jquery javascript to angular using typescript.</p>
  
  <p>The first calls works fine but I have a problem: based on a selection in a dropdown, the event  updates several controls in the view, make a few ajax calls and finally update the view with the data from the calls.</p>
  
  <p>Seems the conversion is working fine, but at the end of the call the page isn't updated.</p>
  
  <ol>
  <li><p>I tried to remove all the old jquery code to avoid problems.</p></li>
  <li><p>batarang and java console reports no errors.</p></li>
  <li><p>the final ajax call is done and the result shown in a debug.</p></li>
  </ol>
  
  <p>All seems to work fine, but the page isn't updated.</p>
  
  <p>How can I find the problem?</p>
  
  <p>thanks</p>