or

ktvGradeLevelFilter = $("#gradeLevelFilterTree").kendoTreeView({ dataTextField: ["text", "GradeLevelID"], dataSource: { transport: { read: function (options) { $.getJSON(Helpers.toServicesUrl("/GetfltEWSGradeLevel"), { username: Context.UserName, districtId: Context.DistrictId, // schoolType: "H" schoolType: schoolTypeParm //ktvSchoolFilter.getSelectedSchoolType() }, function (data) { gradeLevelData = data.GetfltEWSGradeLevelResult.RootResults; gradeLevelData = [{ text: "Grade Level(Counts by Risk Factor)", items: gradeLevelData, expanded: false }]; options.success([]); ktvGradeLevelFilter.dataSource.data(gradeLevelData); }).fail(function (jqXHR) { options.error(jqXHR); }); } }, schema: { model: { children: "items" } } }, checkboxes: { checkChildren: true }}).data("kendoTreeView");