Kendo Grid and MVC3 + JSON

[Cyr]

I try get data from DataBase.
View:

<script type="text/javascript" language="javascript">

    $(document).ready(function () {

        $("#grid").kendoGrid(

        {

            groupable: true,

            scrollable: true,

            sortable: true,

            pageable: true,

            filterable: true,

            

            dataSource: {

                type: "json",              

                transport: {

                    read: {

                        url:  "/Item/GetItems",

                        type: "POST",

                        dataType: "json",

                        contentType: "application/json; charset=utf-8"

                    }

                }

            },

  

  

            columns: [

                                { field: "ID", title: "ID" },

                                { field: "InvNo", title: "Инв.номер" }

                     ]

        });

    });

          

</script>

Controller:

public JsonResult GetItems()

        {

            List<SelectListItem> searchParams = new List<SelectListItem>();

            searchParams.Add(new SelectListItem() { Value = "InvNo", Text = "121" });

  

            IList<Item> data = _itemService.GetItems(searchParams);

            return Json(data.ToList(), JsonRequestBehavior.AllowGet);

        }

data is not empty and successful return 12 items, but grid is empty :(((

Sample with createRandomData(50) from people.js is OK.