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Related Demos:
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JavaScript/jQuery Data Grid - Data Validation
The JavaScript DataGrid allows you to validate user input. You can apply pre-defined validation rules or custom rules to individual columns.
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Backend API
$(() => {
const url = 'https://js.devexpress.com/Demos/NetCore/api/DataGridEmployeesValidation';
$('#gridContainer').dxDataGrid({
dataSource: DevExpress.data.AspNet.createStore({
key: 'ID',
loadUrl: url,
insertUrl: url,
updateUrl: url,
deleteUrl: url,
onBeforeSend(method, ajaxOptions) {
ajaxOptions.xhrFields = { withCredentials: true };
},
}),
repaintChangesOnly: true,
columnAutoWidth: true,
showBorders: true,
paging: {
enabled: false,
},
editing: {
mode: 'batch',
allowUpdating: true,
allowAdding: true,
},
columns: [{
dataField: 'FirstName',
validationRules: [{ type: 'required' }],
}, {
dataField: 'LastName',
validationRules: [{ type: 'required' }],
}, {
dataField: 'Position',
validationRules: [{ type: 'required' }],
}, {
dataField: 'Phone',
validationRules: [{ type: 'required' }, {
type: 'pattern',
message: 'Your phone must have "(555) 555-5555" format!',
pattern: /^\(\d{3}\) \d{3}-\d{4}$/i,
}],
}, {
dataField: 'Email',
validationRules: [{
type: 'required',
}, {
type: 'email',
}, {
type: 'async',
message: 'Email address is not unique',
validationCallback(params) {
return $.ajax({
url: 'https://js.devexpress.com/Demos/NetCore/RemoteValidation/CheckUniqueEmailAddress',
type: 'POST',
dataType: 'json',
contentType: 'application/json',
data: JSON.stringify({
id: params.data.ID,
email: params.value,
}),
});
},
}],
},
],
});
});
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" 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" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script>
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/25.1.3/css/dx.light.css" />
<script src="js/dx.all.js"></script>
<script src="https://unpkg.com/devextreme-aspnet-data@5.0.0/js/dx.aspnet.data.js"></script>
<script src="data.js"></script>
<script src="index.js"></script>
<link rel="stylesheet" type="text/css" href="styles.css" />
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="gridContainer"></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.