Angular ValidationGroup API

The ValidationGroup is a widget that allows you to validate several editors simultaneously.

import { DxValidationGroupModule } from "devextreme-angular"

Type: DxValidationGroupTypes.default

NOTE

Nested validation groups are not supported.

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 ValidationGroup 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 validationGroupName = "sampleGroup";
    $("#textBox1").dxTextBox({ name: "FirstName" })
        .dxValidator({
            validationRules: [
                // ...
            ],
            validationGroup: validationGroupName
        });
    $("#textBox2").dxTextBox({ name: "LastName" })
        .dxValidator({
            validationRules: [
                // ...
            ],
            validationGroup: validationGroupName
        });
    $("#summary").dxValidationSummary({
        validationGroup: validationGroupName
    });
    $("#button").dxButton({
        validationGroup: validationGroupName
        //...
    });
});

<div id="textBox1"></div>
<div id="textBox2"></div>
<div id="summary"></div>
<div id="button"></div>

Angular

HTML

TypeScript

<dx-validation-group>
    <dx-text-box name="FirstName">
        <dx-validator>
            <dxi-validation-rule type="required" message="First name is required"></dxi-validation-rule>
            ...
        </dx-validator>
    </dx-text-box>
    <dx-text-box name="LastName">
        <dx-validator>
            <dxi-validation-rule type="required" message="Last name is required"></dxi-validation-rule>
            ...
        </dx-validator>
    </dx-text-box>
    <dx-validation-summary></dx-validation-summary>
    <dx-button></dx-button>
</dx-validation-group>

import { DxValidationGroupModule, DxTextBoxModule, DxButtonModule, DxValidatorModule } from "devextreme-angular"
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxValidationGroupModule,
        DxTextBoxModule,
        DxButtonModule,
        DxValidatorModule
    ],
    // ...
})

AngularJS

HTML

<div dx-validation-group="{ }" ng-controller="DemoController">
    <div dx-text-box="{ name: 'FirstName' }"
        dx-validator="{
            validationRules: [
                // ...
            ]
        }">  
    </div>
    <div dx-text-box="{ name: 'LastName' }"
        dx-validator="{
            validationRules: [
                // ...
            ]
        }">
    </div>
    <div dx-validation-summary="{  }"></div>
    <div dx-button="{ }"></div>
</div>

Knockout

HTML

<div data-bind="dxValidationGroup: { }" >
    <div data-bind="dxTextBox: { name: 'FirstName' },
        dxValidator: {
            validationRules: [
                // ...
            ]
        }">  
    </div>
    <div data-bind="dxTextBox: { name: 'LastName' },
        dxValidator: {
            validationRules: [
                // ...
            ]
        }">
    </div>  
    <div data-bind="dxValidationSummary: { }"></div>
    <div data-bind="dxButton: { }"></div>
</div>

ASP.NET MVC Controls

Razor C#

Razor VB

using (Html.DevExtreme().ValidationGroup()) {
    @(Html.DevExtreme().TextBox()
        .Name("FirstName")
    )
    @(Html.DevExtreme().TextBox()
        .Name("LastName")
    )
    @(Html.DevExtreme().ValidationSummary())
    @(Html.DevExtreme().Button()
        .Text("Validate")
        .OnClick(@<text>
            function validate (params) {
                params.validationGroup.validate();
            }
        </text>)
    )
}

@Using (Html.DevExtreme().ValidationGroup())
    @(Html.DevExtreme().TextBox() _
        .Name("FirstName")
    )
    @(Html.DevExtreme().TextBox() _
        .Name("LastName")
    )
    @(Html.DevExtreme().ValidationSummary())
    @(Html.DevExtreme().Button() _
        .Text("Validate") _
        .OnClick("validate")
    )
End Using
<script>
    function validate(params) {
        params.validationGroup.validate();
    }
</script>

Properties

An object defining configuration options for the ValidationGroup widget.

Name	Description
elementAttr	Specifies the attributes to be attached to the widget's root element.
height	Specifies the widget's height.
onDisposing	A function that is executed before the widget is disposed of.
onInitialized	A function used in JavaScript frameworks to save the widget instance.
onOptionChanged	A function that is executed after a widget option is changed.
width	Specifies the widget's width.

Methods

This section describes members used to manipulate the widget.

Name	Description
dispose()	Disposes of all the resources allocated to the ValidationGroup instance.
element()	Gets the root widget element.
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.
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.
reset()	Resets the value and validation result of the editors that are included to the current validation group.
validate()	Validates rules of the validators that belong to the current validation group.

Events

This section describes events fired by this widget.

Name	Description
disposing	Raised before the widget is disposed of.
initialized	Raised only once, after the widget is initialized.
optionChanged	Raised after a widget option is changed.

Name

Description

disposing

Raised before the widget is disposed of.

initialized

Raised only once, after the widget is initialized.

optionChanged

Raised after a widget option is changed.