columns.Bound(c => c.EmpName).Title("Employee Name")
.Filterable(filterable => filterable
.Multi(true)

public enum EmpTypes
{
    [Display(Name = "Service")]
    Service = 0,
    [Display(Name = "Sales")]
    Sales = 1,
    [Display(Name = "Purchase")]
    Purchase = 2,
    [Display(Name = "Office")]
    Office = 3
}

columns.Bound(c => c.EmpTypes).Title("Type")
        .Filterable(filterable => filterable
            .Multi(true)
            .UI(“”).DataSource(s=>s.Read(r=>r.Action(“GetEmpTypes”,”Report”)))
            .ItemTemplate(“typetemplate”));
<script>
 function typetemplate(e)
{
  alert('Test');
}

</script>

Public ActionResult GetEmpTypes()
{
 List<EmpType> emptypes = new List<EmpType>();
emptypes.Add(EmpType.Sales)
emptypes.Add(EmpType.Report)
return Json(emptypes,JsonRequestBehavior.AllowGet);
}

function categoryDropdownEditor(container, options) {
        $('<input required data-bind="value:' + options.field + '"/>')
            .appendTo(container)
            .kendoDropDownList({
                dataSource: fk_categoriesDatasource,
                dataTextField: "category",
                dataValueField: "id",
                filter: "contains",
                minLength: 1
            });
    }

$("#grid").kendoGrid({
        dataSource: dataSourceGrid,
       
        autoBind: true,
        scrollable: true,
        sortable: true,
        filterable: true,
        groupable: true,
        resizable: false,
        loaderType: "skeleton",
        pageable: {
            refresh: true,
            numeric: false,
            input: true,
            previousNext: true,
            alwaysVisible: true
        },
        noRecords: {
            template: function (e) {
                return "No hay datos disponibles.";
            }
        },
        columns: [
            {
                title: "Categoría",
                field: "category_id",
                dataTextField: "category",
                dataValueField: "id",
                editor: categoryDropdownEditor,
                filterable: {multi: true},
                dataSource: {
                    transport: {
                        read: {
                            url: apibaseurl + endpoint + "/categories",
                            type: "GET",
                            dataType: "json",
                            beforeSend: addToken,
                        },
                    },
                    schema: {
                        data: "data",
                        total: "total",
                        model: {
                            id: "id",
                            fields: {
                                category: {type: 'string'},
                            }
                        }
                    },
                },
            },
            
            {
                command: [
                    "edit",
                    {
                        name: " ",
                        iconClass: "k-icon k-i-more-vertical",
                    }
                ],
                title: " ",
                width: 210
            }],
        editable: "popup",
    });

function generateTemplate(configs) :string{

    var arryDisplayNames = configs.map(function (a) { return a.displayName; });
    var result = arryDisplayNames.join(", ");

    return result;
}

let configurationDataSource = new kendo.data.DataSource({
    serverFiltering: true,
    transport: {
        read: {
            url: '/api/config',
            data: function (opt) {

                return {
                    roomId: 0
                }

            }
        },
        

    },
    schema: {
        model: {
            id: "id",
            fields: {
                //id: { type: "number" },
                displayName: { type: "string"}
            }
        }
    }
})
let gridDataSource: kendo.data.DataSource = new kendo.data.DataSource({
        autoSync: true,
        transport: {
            read: {
                url: '/api/rooms/',
                type: 'get',
                dataType: 'json',
                data: {
                    buildingid: roomBuildingId
                }
            },
            update: {
                url: '/api/rooms/',
                type: 'post',
                dataType: 'json'

            }
        },
        schema: {
            model: {
                id: "RoomId",
                fields: {
                    roomId: { type: 'number' },
                    buildingId: { type: 'number' },
                    displayName: { type: 'string' },
                    restricted: { type: 'boolean' },
                    isActive: { type: 'boolean' },
                    configurations: { type: 'object' },
                    owners: { type: 'object' },
                }
            }
        }
    });

    let gridColumns: kendo.ui.GridColumn[] = [

        { field: "displayName", title: "Room" },
        {
            field: "configurations",
            title: "Configurations",
            editor: function (container,options) {
                
                var input = $("<input name='Configurations' id='Configurations' >");

                // append to the editor container
                input.appendTo(container);

                // initialize a multiselect
                input.kendoMultiSelect({
                    dataTextField: "displayName",
                    dataValueField: "id",
                    dataSource: configurationDataSource // bind it to the brands array
                }).appendTo(container);
                
            },
            template: "#= generateTemplate(configurations) #"
        },
        { command: ["edit"], title: "&nbsp;"}
    ];


    roomGrid = $('#rooms').kendoGrid({
        dataSource: gridDataSource,
        sortable: true,
        groupable: true,
        pageable: false,
        editable: "inline",
        selectable: "row",
        columns: gridColumns

    }).data('kendoGrid') as kendo.ui.Grid