Ajax request via dropdown use for asp.net mvc

 <script type="text/javascript">  
   $(document).ready(function () {  
     $("#ddldernek").change(function () {  
       var selectedValue = $('#ddldernek').val();  
       $.post('@Url.Action("Index", "Etkinlikler")', { selection: selectedValue }, function (data) {  
         // handle the server response here  
       });  
     });  
   });  
 </script>