<input id="combobox" />
<script>
$("#combobox").kendoComboBox({
  dataSource: [
    { id: 1, name: "Apples" },
    { id: 2, name: "Oranges" }
  ],
  dataTextField: "name",
  dataValueField: "id",
  index: 1
});

var combobox = $("#combobox").data("kendoComboBox");

combobox.refresh();
</script>