col.dataTextField = col.dataTextField ?? "text";
        col.dataValueField = col.dataValueField ?? "value";
        col.dataSource = {
            type: "json",
            transport: {
                read: function (options) {
                    ufn_ApiGetLookup({
                        data: col.source,
                        success: function (d) {
                            options.success(ufn_GetData(d));
                        }
                    });
                }
            }
        }

   $('#buyer').kendoComboBox({
                        dataSource: new kendo.data.DataSource({
                            type: 'aspnetmvc-ajax',
                            serverFiltering: true,
                            serverPaging: true,
                            serverSorting: true,
                            transport: {
                                read: {
                                    url: kmc.urlBase + '/lookups/buyers',
                                    dataType: 'json',
                                    type: 'POST',
                                    beforeSend: function (xhr) {
                                        kmc.setRequestVerificationToken(xhr);
                                    }
                                }
                            },
                            schema: {
                                aggregateResults: 'aggregateResults',
                                data: 'data',
                                errors: 'errors',
                                total: 'total',
                                model: {
                                    id: 'id',
                                    fields: {
                                        id: { type: 'number' },
                                        name: { type: 'string' },
                                        code: { type: 'string' },
                                        cidNID: { type: 'string' },
                                        addr: { type: 'string' },
                                        tel: { type: 'string' },
                                        fax: { type: 'string' }
                                    }
                                }
                            },
                            error: function (e) {
                                if (e.status === 'customerror') {
                                    pki.alert(e.errors);
                                } else {
                                    var failure = pki.parseJson(e.xhr.responseText);
                                    if (failure && failure.success === false) {
                                        pki.alert('Status: ' + e.xhr.status + '<br/><br/>Error: ' + failure.errors);
                                    } else {
                                        pki.alert('Status: ' + e.xhr.status + '<br/><br/>Error: ' + e.xhr.responseText);
                                    }
                                }
                            }
                        }),
                        dataTextField: 'name',
                        dataValueField: 'id',
                        filter: 'startswith',
                        valuePrimitive: true,
                        //change: function (e) {
                        //    var dataItem = this.dataItem();
                        //    if (dataItem) {
                        //        pro.headerModel.set('buyer', { id: dataItem.Id, name: dataItem.Name });
                        //    }
                        //},
                        minLength: 2,
                        select: function (e) {
                            var item = e.dataItem;
                            if (item) {
                                $('#buyer-name').text(`TO: ${item.name}`);
                                $('#buyer-addr').text(`ADD: ${item.addr}`);
                                $('#buyer-tel').text(`TEL: ${item.tel}`);
                                $('#buyer-fax').text(`FAX: ${item.fax}`);
                                $('#buyer-nid').text(`COMMERCIAL/NATIONAL ID: ${item.cidNID}`);
                            }
                        }
                    });







 






 html code :

                                <td>
                                <span class="caption">Buyer: </span>
                                <input id="buyer" name="buyer" class="combobox-lg" data-bind="value: buyer.id" required />
                               </td>

 @(Html.Kendo().ComboBox()
                            .Name("combo" + item.DataField.ID)
                            .Filter("contains")
                            .DataTextField("DataTextField")
                            .DataValueField("DataTextValue")
                            .Placeholder("Select an item...")
                            .AutoBind(false)
                            .ClearButton(true)
                            .DataSource(source =>
                            {
                                
                                source.Custom()
                                    .ServerFiltering(true)
                                    .ServerPaging(true)
                                    .PageSize(40)
                                    
                                    .Type("aspnetmvc-ajax") //Set this type if you want to use DataSourceRequest and ToDataSourceResult instances
                                    .Transport(transport =>
                                    {

                                        transport.Read(r =>
                                        {

                                            
                                            r.Action("Virtualization_ReadComboEdit3", "Search", new { dataFieldId = item.DataField.ID }).Type(HttpVerbs.Post).Data("getFormData");



                                        });
                                        

                                    })
                                    
                                    .Schema(schema =>
                                    {
                                        schema.Data("Data") //define the [data](https://docs.telerik.com/kendo-ui/api/javascript/data/datasource#configuration-schema.data) option
                                              .Total("Total"); //define the [total](https://docs.telerik.com/kendo-ui/api/javascript/data/datasource#configuration-schema.total) option
                                    });
                            })
                        .HtmlAttributes(new { style = "width:100%;", data_parent_id = (item.DataField.ParentDataFieldID!=null ? item.DataField.ParentDataFieldID.ToString() : ""), data_conditional = item.DataField.IsConditionListener })
                        .FooterTemplate("<b>#: instance.dataSource.total() # items found<b/>")
                        .Events(e =>
                        {
                            e.Select("onSelectCombo");
                            e.Open("onOpenCombo");
                            e.Change("onChangeCombo");



                        })
                        .Virtual(v =>
                        {
                            v.MapValueTo("dataItem");
                            v.ItemHeight(26);
                            v.ValueMapper(e => "function(options) { dropdownMapper(options," + item.DataField.ID + "); }");
                        })
                        .Value(item.DataField.CurrentFieldValueSingle.ToString())
                        .Text(item.DataField.CurrentFieldText)
                            )

    $(document).ready(function () {
        var itemCombo = $("#Items").data("kendoComboBox");
        itemCombo.input.on("click", function () {
            itemCombo.search(itemCombo.text);
        });
    });