ASP.NET MVC ComboBox Overview

Telerik UI for ASP.NET MVC Ninja image

The ComboBox is part of Telerik UI for ASP.NET MVC, a professional grade UI library with 110+ components for building modern and feature-rich applications. To try it out sign up for a free 30-day trial.

The Telerik UI ComboBox HtmlHelper for ASP.NET MVC is a server-side wrapper for the Kendo UI ComboBox widget.

The ComboBox displays a list of values and allows for a single selection from the list.

Initializing the ComboBox

The following example demonstrates how to define the ComboBox.

    @(Html.Kendo().ComboBox()
        .Name("combobox")
        .DataTextField("ProductName")
        .DataValueField("ProductID")
        .DataSource(source => {
            source.Read(read =>
            {
                read.Action("Products_Read", "ComboBox");
            });
        })
    )

    public class ComboBoxController : Controller
    {
        public IActionResult Index()
        {
            return View();
        }

        public JsonResult Products_Read()
        {
            var result = Enumerable.Range(0, 50).Select(i => new ProductViewModel
            {
                ProductID = "" + i,
                ProductName = "Product " + i
            });

            return Json(result);
        }
    }

Basic Configuration

The following example demonstrates the basic configuration of the ComboBox.

    @(Html.Kendo().ComboBox()
        .Name("combobox")
        .DataTextField("ProductName")
        .DataValueField("ProductID")
        .HtmlAttributes(new { style = "width:100%" })
        .Filter("contains")
        .MinLength(3)
        .Height(290)
        .HeaderTemplate(
            "<div class=\"dropdown-header k-widget k-header\">" +
                "<span>Products</span>" +
            "</div>")
        .FooterTemplate("Total <strong>#: instance.dataSource.total() #</strong> items found")
        .DataSource(source =>
        {
            source.Read(read =>
            {
                read.Action("Products_Read2", "DropDownList");
            })
            .ServerFiltering(false);
        })
        .Events(e => e
            .Change("onChange")
            .Select("onSelect")
            .Open("onOpen")
            .Close("onClose")
            .DataBound("onDataBound")
            .Filtering("onFiltering")
        )
    )

    <script type="text/javascript">
        $(function () {
            // The Name() of the ComboBox is used to get its client-side instance.
            var combobox = $("#combobox").data("kendoComboBox");
            console.log(combobox);
        });
    </script>

Functionality and Features

Feature Description
Binding You can bind the ComboBox to local arrays of data and to remote data services.
Appearance You can customize the appearance of the ComboBox by configuring its size, fill mode, and border radius.
Grouping In the ComboBox, you can display data items that are grouped by a specific model field.
Virtualization The built-in virtualization of the ComboBox allows you to display large datasets.
Filtering You can display only a subset of the available data by using the server-side filtering of the ComboBox.
Templates To take full control over the rendering of the ComboBox items, popup header, and popup footer, you can use the available templates.
Cascading You can use a series of two or more cascaded ComboBoxes.
Accessibility The ComboBox is accessible by screen readers and provides WAI-ARIA, Section 508, WCAG 2.1, and keyboard support.

Next Steps

See Also

In this article