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Data Validation

The DataGrid allows you to validate user input. You can apply pre-defined validation rules or custom rules to individual columns.

In this demo, the following rules are used:

  • required
    Specifies that cells should not be empty.
  • pattern
    Specifies a pattern that cell values should match.
  • email
    Specifies that cell values match the Email pattern.
  • async
    Specifies custom validation parameters that are used to validate a value on the server.

For more information on these and other validation rules, refer to the following documentation section: Validation Rules.

Backend API
<template> <div> <DxDataGrid :data-source="dataSource" :show-borders="true" :column-auto-width="true" :repaint-changes-only="true" > <DxEditing :allow-updating="true" :allow-adding="true" mode="batch" /> <DxPaging :enabled="false"/> <DxColumn data-field="FirstName"> <DxRequiredRule/> </DxColumn> <DxColumn data-field="LastName"> <DxRequiredRule/> </DxColumn> <DxColumn data-field="Position"> <DxRequiredRule/> </DxColumn> <DxColumn data-field="Phone"> <DxRequiredRule/> <DxPatternRule :pattern="pattern" message="Your phone must have &quot;(555) 555-5555&quot; format!" /> </DxColumn> <DxColumn data-field="Email"> <DxRequiredRule/> <DxEmailRule/> <DxAsyncRule :validation-callback="asyncValidation" message="Email address is not unique" /> </DxColumn> </DxDataGrid> </div> </template> <script setup lang="ts"> import { DxDataGrid, DxColumn, DxPaging, DxEditing, DxRequiredRule, DxEmailRule, DxPatternRule, DxAsyncRule, } from 'devextreme-vue/data-grid'; import { ValidationCallbackData } from 'devextreme-vue/common'; import { createStore } from 'devextreme-aspnet-data-nojquery'; const url = 'https://js.devexpress.com/Demos/Mvc/api/DataGridEmployeesValidation'; const emailValidationUrl = 'https://js.devexpress.com/Demos/Mvc/RemoteValidation/CheckUniqueEmailAddress'; const dataSource = createStore({ key: 'ID', loadUrl: url, insertUrl: url, updateUrl: url, deleteUrl: url, onBeforeSend: (method, ajaxOptions) => { ajaxOptions.xhrFields = { withCredentials: true }; }, }); const pattern = /^\(\d{3}\) \d{3}-\d{4}$/i; const asyncValidation = async(params: ValidationCallbackData) => { const response = await fetch(emailValidationUrl, { method: 'POST', headers: { 'Content-Type': 'application/json;', }, body: JSON.stringify({ id: params.data.ID, email: params.value, }), }); const result = await response.json(); return result; }; </script>
window.exports = window.exports || {}; window.config = { transpiler: 'plugin-babel', meta: { '*.vue': { loader: 'vue-loader', }, '*.ts': { loader: 'demo-ts-loader', }, '*.svg': { loader: 'svg-loader', }, 'devextreme/time_zone_utils.js': { 'esModule': true, }, 'devextreme/localization.js': { 'esModule': true, }, 'devextreme/viz/palette.js': { 'esModule': true, }, 'devextreme-aspnet-data-nojquery': { 'esModule': true, }, }, paths: { 'root:': '../../../../../', 'npm:': 'https://unpkg.com/', }, map: { 'vue': 'npm:vue@3.3.4/dist/vue.esm-browser.js', 'vue-loader': 'npm:dx-systemjs-vue-browser@1.1.1/index.js', 'demo-ts-loader': 'root:utils/demo-ts-loader.js', 'svg-loader': 'root:utils/svg-loader.js', 'devextreme-aspnet-data-nojquery': 'npm:devextreme-aspnet-data-nojquery@3.0.0/index.js', 'mitt': 'npm:mitt/dist/mitt.umd.js', 'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.28.1/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@23.2.5/cjs', 'devextreme-vue': 'npm:devextreme-vue@23.2.5/cjs', 'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.6.4/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.2.5/dist/dx-diagram.js', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.51/dist/dx-gantt.js', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.12', 'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js', 'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js', // Prettier 'prettier/standalone': 'npm:prettier@2.8.4/standalone.js', 'prettier/parser-html': 'npm:prettier@2.8.4/parser-html.js', }, packages: { 'devextreme-vue': { main: 'index.js', }, 'devextreme': { defaultExtension: 'js', }, 'devextreme/events/utils': { main: 'index', }, 'devextreme/events': { main: 'index', }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js', }, }, packageConfigPaths: [ 'npm:@devextreme/*/package.json', 'npm:@devextreme/runtime@3.0.12/inferno/package.json', ], babelOptions: { sourceMaps: false, stage0: true, }, }; System.config(window.config);
import { createApp } from 'vue'; import App from './App.vue'; createApp(App).mount('#app');
<!DOCTYPE html> <html> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/23.2.5/css/dx.light.css" /> <script type="module"> import * as vueCompilerSFC from "https://unpkg.com/@vue/compiler-sfc@3.3.4/dist/compiler-sfc.esm-browser.js"; window.vueCompilerSFC = vueCompilerSFC; </script> <script src="https://unpkg.com/typescript@4.2.4/lib/typescript.js"></script> <script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import("./index.ts"); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"> </div> </div> </body> </html>