如何在Kendo网格列中显示复选框

columns: [
  { field: "id", title: "ID" },
  { field: "name", title: "Name" },
  { field: "age", title: "Age" },
  { field: "selected", title: "Selected", template: '<input type="checkbox" #= selected ? "checked" : "" # />' }
]

var dataSource = new kendo.data.DataSource({
  data: [
    { id: 1, name: "John", age: 25, selected: true },
    { id: 2, name: "Jane", age: 30, selected: false },
    { id: 3, name: "Bob", age: 35, selected: true }
  ]
});

$("#grid").kendoGrid({
  dataSource: dataSource,
  columns: [
    { field: "id", title: "ID" },
    { field: "name", title: "Name" },
    { field: "age", title: "Age" },
    { field: "selected", title: "Selected", template: '<input type="checkbox" #= selected ? "checked" : "" # />' }
  ]
});