Backend API
import React from 'react';
import DataGrid, {
Column, Editing, Paging, RequiredRule, PatternRule, EmailRule, AsyncRule,
} from 'devextreme-react/data-grid';
import { createStore } from 'devextreme-aspnet-data-nojquery';
const url = 'https://js.devexpress.com/Demos/NetCore/api/DataGridEmployeesValidation';
const emailValidationUrl = 'https://js.devexpress.com/Demos/NetCore/RemoteValidation/CheckUniqueEmailAddress';
const dataSource = createStore({
key: 'ID',
loadUrl: url,
insertUrl: url,
updateUrl: url,
deleteUrl: url,
onBeforeSend: (method, ajaxOptions) => {
ajaxOptions.xhrFields = { withCredentials: true };
},
});
// eslint-disable-next-line space-before-function-paren
const asyncValidation = async (params) => {
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;
};
const App = () => (
<DataGrid
dataSource={dataSource}
showBorders={true}
columnAutoWidth={true}
repaintChangesOnly={true}
>
<Paging enabled={false} />
<Editing
mode="batch"
allowUpdating={true}
allowAdding={true} />
<Column dataField="FirstName">
<RequiredRule />
</Column>
<Column dataField="LastName">
<RequiredRule />
</Column>
<Column dataField="Position">
<RequiredRule />
</Column>
<Column dataField="Phone">
<RequiredRule />
<PatternRule
message={'Your phone must have "(555) 555-5555" format!'}
pattern={/^\(\d{3}\) \d{3}-\d{4}$/i}
/>
</Column>
<Column dataField="Email">
<RequiredRule />
<EmailRule />
<AsyncRule
message="Email address is not unique"
validationCallback={asyncValidation}
/>
</Column>
</DataGrid>
);
export default App;
import React from 'react';
import DataGrid, {
Column,
Editing,
Paging,
RequiredRule,
PatternRule,
EmailRule,
AsyncRule,
} from 'devextreme-react/data-grid';
import { createStore } from 'devextreme-aspnet-data-nojquery';
const url = 'https://js.devexpress.com/Demos/NetCore/api/DataGridEmployeesValidation';
const emailValidationUrl = 'https://js.devexpress.com/Demos/NetCore/RemoteValidation/CheckUniqueEmailAddress';
const dataSource = createStore({
key: 'ID',
loadUrl: url,
insertUrl: url,
updateUrl: url,
deleteUrl: url,
onBeforeSend: (method, ajaxOptions) => {
ajaxOptions.xhrFields = { withCredentials: true };
},
});
// eslint-disable-next-line space-before-function-paren
const asyncValidation = async (params) => {
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;
};
const App = () => (
<DataGrid
dataSource={dataSource}
showBorders={true}
columnAutoWidth={true}
repaintChangesOnly={true}
>
<Paging enabled={false} />
<Editing
mode="batch"
allowUpdating={true}
allowAdding={true}
/>
<Column dataField="FirstName">
<RequiredRule />
</Column>
<Column dataField="LastName">
<RequiredRule />
</Column>
<Column dataField="Position">
<RequiredRule />
</Column>
<Column dataField="Phone">
<RequiredRule />
<PatternRule
message={'Your phone must have "(555) 555-5555" format!'}
pattern={/^\(\d{3}\) \d{3}-\d{4}$/i}
/>
</Column>
<Column dataField="Email">
<RequiredRule />
<EmailRule />
<AsyncRule
message="Email address is not unique"
validationCallback={asyncValidation}
/>
</Column>
</DataGrid>
);
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.tsx';
ReactDOM.render(
<App />,
document.getElementById('app'),
);
window.exports = window.exports || {};
window.config = {
transpiler: 'ts',
typescriptOptions: {
module: 'system',
emitDecoratorMetadata: true,
experimentalDecorators: true,
jsx: 'react',
},
meta: {
'react': {
'esModule': true,
},
'typescript': {
'exports': 'ts',
},
'devextreme/time_zone_utils.js': {
'esModule': true,
},
'devextreme/localization.js': {
'esModule': true,
},
'devextreme/viz/palette.js': {
'esModule': true,
},
'devextreme-aspnet-data-nojquery': {
'esModule': true,
},
'openai': {
'esModule': true,
},
},
paths: {
'npm:': 'https://cdn.jsdelivr.net/npm/',
'bundles:': '../../../../bundles/',
'externals:': '../../../../bundles/externals/',
},
defaultExtension: 'js',
map: {
'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js',
'typescript': 'npm:typescript@4.2.4/lib/typescript.js',
'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js',
'react': 'npm:react@17.0.2/umd/react.development.js',
'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js',
'prop-types': 'npm:prop-types/prop-types.js',
'devextreme-aspnet-data-nojquery': 'npm:devextreme-aspnet-data-nojquery@5.0.0/index.js',
'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',
'luxon': 'npm:luxon@3.4.4/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign',
'devextreme': 'npm:devextreme@link:../../packages/devextreme/artifacts/npm/devextreme/cjs',
'devextreme-react': 'npm:devextreme-react@link:../../packages/devextreme-react/npm/cjs',
'devextreme-quill': 'npm:devextreme-quill@1.7.6/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.2.24/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.64/dist/dx-gantt.js',
'inferno': 'npm:inferno@8.2.3/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@8.2.3/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate/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',
'@preact/signals-core': 'npm:@preact/signals-core@1.8.0/dist/signals-core.min.js',
'devextreme-cldr-data': 'npm:devextreme-cldr-data@1.0.3',
// SystemJS plugins
'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@2.8.8/standalone.js',
'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js',
},
packages: {
'devextreme': {
defaultExtension: 'js',
},
'devextreme-react': {
main: 'index.js',
},
'devextreme-react/common': {
main: 'index.js',
},
'devextreme/events/utils': {
main: 'index',
},
'devextreme/common/core/events/utils': {
main: 'index',
},
'devextreme/localization/messages': {
format: 'json',
defaultExtension: 'json',
},
'devextreme/events': {
main: 'index',
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js',
},
},
packageConfigPaths: [
'npm:@devextreme/*/package.json',
],
babelOptions: {
sourceMaps: false,
stage0: true,
react: true,
},
};
System.config(window.config);
// eslint-disable-next-line
const useTgzInCSB = ['openai'];
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(<App />, document.getElementById('app'));
<!DOCTYPE html>
<html lang="en">
<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=5.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/25.1.6/css/dx.light.css" />
<script src="https://cdn.jsdelivr.net/npm/core-js@2.6.12/client/shim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/systemjs@0.21.3/dist/system.js"></script>
<script type="text/javascript" src="config.js"></script>
<script type="text/javascript">
System.import("./index.tsx");
</script>
<link rel="stylesheet" type="text/css" href="styles.css" />
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
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.