React DropDownBox API

The DropDownBox widget consists of a text field, which displays the current value, and a drop-down field, which can contain any UI element.

import DropDownBox from "devextreme-react/drop-down-box"

DevExtreme widgets are integrated with many popular libraries and frameworks. See the Installation section (for JavaScript libraries) or the Prerequisites and Installation section (for ASP.NET MVC framework) to find details on setting up DevExtreme with a particular library or framework.

The following code shows how to create the DropDownBox widget using every supported library and framework. For more details on working with widgets in these libraries and frameworks, see the Widget Basics topic for jQuery, Angular, AngularJS, Knockout or ASP.NET MVC.

jQuery

JavaScript

HTML

$(function () {
    var fruits = ["Apples", "Oranges", "Lemons", "Pears", "Pineapples"];
    $("#dropDownBox").dxDropDownBox({
        value: fruits[0],
        dataSource: fruits,
        contentTemplate: function (e) {
            var $list = $("<div>").dxList({
                dataSource: fruits,
                selectionMode: "single",
                onSelectionChanged: function (args) {
                    e.component.option("value", args.addedItems[0]);
                    e.component.close();
                }
            });
            return $list;
        }
    });
});

<div id="dropDownBox"></div>

Angular

HTML

TypeScript

<dx-drop-down-box
    [(value)]="selectedFruit"
    [(opened)]="isDropDownBoxOpened"
    [dataSource]="fruits">
    <div *dxTemplate="let contentData of 'content'">
        <dx-list 
            [dataSource]="fruits"
            selectionMode="single"
            (onSelectionChanged)="changeDropDownBoxValue($event)">
        </dx-list>
    </div>
</dx-drop-down-box>

import { DxDropDownBoxModule } from 'devextreme-angular';
// ...
export class AppComponent {
    fruits = ["Apples", "Oranges", "Lemons", "Pears", "Pineapples"];
    selectedFruit = fruits[0];
    isDropDownBoxOpened = false;
    changeDropDownBoxValue = function (args) {
        selectedFruit = args.addedItems[0];
        isDropDownBoxOpened = false;
    }
}
@NgModule({
    imports: [
        // ...
        DxDropDownBoxModule
    ],
    // ...
})

AngularJS

HTML

JavaScript

<div ng-controller="DemoController">
    <div dx-drop-down-box="{
        dataSource: fruits,
        bindingOptions: {
            value: 'selectedFruit',
            opened: 'isDropDownBoxOpened'
        }
    }">
        <div data-options="dxTemplate: { name: 'content' }">
            <div dx-list="{
                dataSource: fruits,
                selectionMode: 'single',
                onSelectionChanged: changeDropDownBoxValue
            }"></div>
        </div>
    </div>
</div>

angular.module('DemoApp', ['dx'])
    .controller('DemoController', function ($scope) {
        $scope.fruits = ["Apples", "Oranges", "Lemons", "Pears", "Pineapples"];
        $scope.selectedFruit = $scope.fruits[0];
        $scope.isDropDownBoxOpened = false;
        $scope.changeDropDownBoxValue = function (args) {
            $scope.selectedFruit = args.addedItems[0];
            $scope.isDropDownBoxOpened = false;
        }
    });

Knockout

HTML

JavaScript

<div data-bind="dxDropDownBox: {
    value: fruits[0],
    dataSource: fruits,
    opened: isDropDownBoxOpened
}">
    <div data-options="dxTemplate: { name: 'content' }">
        <div data-bind="dxList: {
            dataSource: fruits,
            selectionMode: 'single',
            onSelectionChanged: changeDropDownBoxValue
        }"></div>
    </div>
</div>

var viewModel = function () {
    var vm = { };
    vm.fruits = ["Apples", "Oranges", "Lemons", "Pears", "Pineapples"];
    vm.selectedFruit = ko.observable(vm.fruits[0]);
    vm.isDropDownBoxOpened = ko.observable(false);
    vm.changeDropDownBoxValue = function (args) {
        vm.selectedFruit(args.addedItems[0]);
        vm.isDropDownBoxOpened(false);
    }
    return vm;
};
ko.applyBindings(viewModel);

ASP.NET MVC Controls

Razor C#

Razor VB

@(Html.DevExtreme().DropDownBox()
    .ID("dropDownBox")
    .DataSource(new[] { "Apples", "Oranges", "Lemons", "Pears", "Pineapples" })
    .Value("Apples")
    .ContentTemplate(@<text>
        @(Html.DevExtreme().List()
            .DataSource(new JS("component.option('dataSource')"))
            .SelectionMode(ListSelectionMode.Single)
            .OnSelectionChanged("innerList_selectionChanged")
        )
    </text>)
)

<script>
    function innerList_selectionChanged (e) {
        var dropDownBox = $("#dropDownBox").dxDropDownBox("instance");
        dropDownBox.option("value", e.addedItems[0]);
        dropDownBox.close();
    }
</script>

@Code
    Html.DevExtreme().DropDownBox() _
        .ID("dropDownBox") _
        .DataSource({ "Apples", "Oranges", "Lemons", "Pears", "Pineapples" }) _
        .Value("Apples") _
        .ContentTemplate(Sub()
            @<text>
                @Html.DevExtreme().List() _
                    .DataSource(New JS("component.option('dataSource')")) _
                    .SelectionMode(ListSelectionMode.Single) _
                    .OnSelectionChanged("innerList_selectionChanged")
            </text>
        End Sub).Render()
End Code

<script>
    function innerList_selectionChanged (e) {
        var dropDownBox = $("#dropDownBox").dxDropDownBox("instance");
        dropDownBox.option("value", e.addedItems[0]);
        dropDownBox.close();
    }
</script>

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Configuration

An object defining configuration options for the DropDownBox widget.

Name	Description
acceptCustomValue	Specifies whether the widget allows a user to enter a custom value.
accessKey	Specifies the shortcut key that sets focus on the widget.
activeStateEnabled	Specifies whether or not the widget changes its state when interacting with a user.
contentTemplate	Specifies a custom template for the drop-down content.
dataSource	A data source used to fetch data the widget should display.
deferRendering	Specifies whether to render the drop-down field's content when it is displayed. If false, the content is rendered immediately.
disabled	Specifies whether the widget responds to user interaction.
displayExpr	Specifies the name of the data source item field whose value is displayed by the widget.
dropDownButtonTemplate	Specifies a custom template for the drop-down button.
dropDownOptions	Configures the drop-down field which holds the content.
elementAttr	Specifies the attributes to be attached to the widget's root element.
fieldTemplate	Specifies a custom template for the text field. Must contain the TextBox widget.
focusStateEnabled	Specifies whether the widget can be focused using keyboard navigation.
height	Specifies the widget's height.
hint	Specifies text for a hint that appears when a user pauses on the widget.
hoverStateEnabled	Specifies whether the widget changes its state when a user pauses on it.
inputAttr	Specifies the attributes to be passed on to the underlying HTML element.
isValid	Specifies whether the editor's value is valid.
items	An array of items displayed by the widget.
name	The value to be assigned to the `name` attribute of the underlying HTML element.
onChange	A handler for the change event.
onClosed	A handler for the closed event.
onCopy	A handler for the copy event.
onCut	A handler for the cut event.
onDisposing	A handler for the disposing event. Executed when the widget is removed from the DOM using the remove(), empty(), or html() jQuery methods only.
onEnterKey	A handler for the enterKey event.
onFocusIn	A handler for the focusIn event.
onFocusOut	A handler for the focusOut event.
onInitialized	A handler for the initialized event. Executed only once, after the widget is initialized.
onInput	A handler for the input event.
onKeyDown	A handler for the keyDown event.
onKeyPress	A handler for the keyPress event.
onKeyUp	A handler for the keyUp event.
onOpened	A handler for the opened event.
onOptionChanged	A handler for the optionChanged event. Executed after an option of the widget is changed.
onPaste	A handler for the paste event.
onValueChanged	A handler for the valueChanged event.
opened	Specifies whether or not the drop-down editor is displayed.
placeholder	The text displayed by the widget when the widget value is empty.
readOnly	A Boolean value specifying whether or not the widget is read-only.
rtlEnabled	Switches the widget to a right-to-left representation.
showClearButton	Specifies whether to display the Clear button in the widget.
tabIndex	Specifies the number of the element when the Tab key is used for navigating.
text	The read-only option that holds the text displayed by the widget input element.
validationError	Specifies information on the validation error when using a custom validation engine. Should be changed at runtime along with the isValid option.
validationMessageMode	Specifies how the message about the validation rules that are not satisfied by this editor's value is displayed.
value	Specifies the currently selected value. May be an object if dataSource contains objects and valueExpr is not set.
valueChangeEvent	Specifies the DOM events after which the widget's value should be updated.
valueExpr	Specifies which data field provides the widget's value. When this option is not set, the value is the entire data object.
visible	Specifies whether the widget is visible.
width	Specifies the widget's width.

Methods

This section describes members used to manipulate data.

Name	Description
beginUpdate()	Prevents the widget from refreshing until the endUpdate() method is called.
blur()	Removes focus from the input element.
close()	Closes the drop-down editor.
content()	Gets the popup window's content.
defaultOptions(rule)	Specifies the device-dependent default configuration options for this component.
dispose()	Disposes of all the resources allocated to the DropDownBox instance.
element()	Gets the root widget element.
endUpdate()	Refreshes the widget after a call of the beginUpdate() method.
field()	Gets the widget's `<input>` element.
focus()	Sets focus to the input element representing the widget.
getDataSource()	Gets the DataSource instance.
getInstance(element)	Gets the instance of a widget found using its DOM node.
instance()	Gets the widget's instance. Use it to access other methods of the widget.
off(eventName)	Detaches all event handlers from a single event.
off(eventName, eventHandler)	Detaches a particular event handler from a single event.
on(eventName, eventHandler)	Subscribes to an event.
on(events)	Subscribes to events.
open()	Opens the drop-down editor.
option()	Gets all widget options.
option(optionName)	Gets the value of a single option.
option(optionName, optionValue)	Updates the value of a single option.
option(options)	Updates the values of several options.
registerKeyHandler(key, handler)	Registers a handler to be executed when a user presses a specific key.
repaint()	Repaints the widget. Call it if you made modifications that changed the widget's state to invalid.
reset()	Resets the value option to the default value.

Events

This section describes events that this widget raises.

Name	Description
change	Fires when a change within the widget's input element is committed by an end user.
closed	Fires after a drop-down list has been hidden.
copy	Fires after the widget's input has been copied.
cut	Fires after the Cut DOM event has fired.
disposing	Raised when the widget is removed from the DOM using the remove(), empty(), or html() jQuery methods only.
enterKey	Fires after the Enter key has been pressed within the widget's input element.
focusIn	Fires after the widget's input has been focused.
focusOut	Fires after the widget's input element has lost focus.
initialized	Raised only once, after the widget is initialized.
input	Fires when a value within the widget's input element is changed by an end user.
keyDown	Fires when a key is pressed down within the widget's input element.
keyPress	Fires when the keypress DOM event has been raised for the current input element.
keyUp	Fires when a key is released within the widget's input element.
opened	Fires when the drop-down editor is shown.
optionChanged	Raised after a widget option is changed.
paste	Fires after the widget's input has been pasted.
valueChanged	Fires when the editor value changes.

React DropDownBox API

See Also