title: ASP.NET page should not post back the whole page on Submit
body: <p>I have an ASP.NET page with a Submit button. When I click the button my code runs and then the page reload/refresh....the whole page gets posted back.</p>
  
  <p>What must I use or do to prevent the page from reload? AJAX? How would this be done?</p>
  
  <p>Code examples would be great!</p>