ComboBox Overview

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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

Events

You can subscribe to all ComboBox events. For a complete example on basic ComboBox events, refer to the demo on using the events of the ComboBox.

Handling by Handler Name

The following example demonstrates how to subscribe to events by a handler name.

    @(Html.Kendo().ComboBox()
        .Name("combobox")
        .BindTo(new string[] { "Item1", "Item2", "Item3" })
        .Events(e => e
            .Select("combobox_select")
            .Change("combobox_change")
        )
    )
    <script>
    function combobox_select() {
        // Handle the select event.
    }

    function combobox_change() {
        // Handle the change event.
    }

    $(document).ready(function() {
        var comboBoxWidget = $("#combobox").data("kendoComboBox"); //Get an instance of the ComboBox.
        comboBoxWidget.value("Item3"); //Set the value of the ComboBox programmatically when the page has finished loading.
        comboBoxWidget.trigger("change"); //Trigger the "change" event manually (the value() method does not trigger it). Refer to the client-side API for further details.
    });
    </script>

Handling by Template Delegate

The following example demonstrates how to subscribe to events by a template delegate.

    @(Html.Kendo().ComboBox()
        .Name("combobox")
        .BindTo(new string[] { "Item1", "Item2", "Item3" })
        .Events(e => e
            .Select(@<text>
            function() {
                // Handle the select event inline.
            }
            </text>)
            .Change(@<text>
            function() {
                // Handle the change event inline.
            }
            </text>)
        )
    )

See Also

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