jquery - I can not return to PartialView by using JSON -

i have been looking return partialview using json.however can see partial view's name html.

İf username , password not null , ı want redirect partialview.

[httpget] public actionresult index() { return view(); } 

index view:

<script type="text/javascript"> function test() {  var veri = { kullaniciad: $('#kullaniciad').val(), sifre: $('#sifre').val(), };  $.ajax({ url: "/home/menu", type: "post", datatype: "json", contenttype: 'application/json', data: json.stringify(veri), success: function (mydata) {  $("#message").html(mydata); }, error: function () { $("#message").html("error"); } });  return false;  } </script>  <input type="text" id="kullaniciad" name="kullaniciad" /> <input type="password" id="sifre" name="sifre" /> <input type="button" onclick="test()" value="giriş" />   <div id="message"></div> 

my menu actionresult

 public actionresult menu(mymodel model)     {         if (model.kullaniciad != null && model.sifre != null)         {             return json("_menupartial", jsonrequestbehavior.allowget);          }         return null;     } 

you need render view string

  public string renderrazorviewtostring(string viewname, object model)   {     viewdata.model = model;     using (var sw = new stringwriter())     {       var viewresult = viewengines.engines.findpartialview(controllercontext, viewname);       var viewcontext = new viewcontext(controllercontext, viewresult.view, viewdata, tempdata, sw);       viewresult.view.render(viewcontext, sw);       viewresult.viewengine.releaseview(controllercontext, viewresult.view);       return sw.getstringbuilder().tostring();      }   } 

in controller

var stringview = renderrazorviewtostring("_menupartial",model) return json(stringview , jsonrequestbehavior.allowget);