How To Bind JSON Data To Kendo Dropdownlist

@(Html.Kendo().DropDownList()
 .Name("ExamIDED") //The name of the dropdownlist is mandatory. It specifies the "id" attribute of the widget.
 .DataTextField("ExamDateStr") //Specifies which property of the Product to be used by the dropdownlist as a text.
 .DataValueField("ExamID") //Specifies which property of the Product to be used by the dropdownlist as a value.
 .OptionLabel("Select Exam Date...").HtmlAttributes(new { style = "width:175px", data_value_primitive = "true" })
            .DataSource(source =>
            {
                source.Read(read =>
                {
                    read.Action("GetExamDate", "AptitudeTset"); //Set the Action and Controller name
                })
                .ServerFiltering(true); //If true the DataSource will not filter the data on the client.
            })
    .SelectedIndex(1) //Select first item.
)

"AptitudeTset" Controller Action returns JSON data.

public ActionResult GetExamDate()
 {
      //Read List of Exams
      List<AptitudeTestExamSelectModel> model = rep.ReadExamSelectList(); // Possibly, your database call goes here.
      return Json(model, JsonRequestBehavior.AllowGet);
  }