Data binding in EJ2 JavaScript Data control

2 Dec 20238 minutes to read

DataManager supports both RESTful JSON data services binding and local JavaScript object array binding.

Local data binding

DataManager can be bound to local data source by assigning the array of JavaScript objects to the json property or simply passing them
to the constructor while instantiating. Now the JavaScript object array can be queried and manipulated.

var template = '<tr><td>${OrderID}</td><td>${CustomerID}</td><td>${EmployeeID}</td></tr>';
var compiledFunction = ej.base.compile(template);

var result = new ej.data.DataManager(data).executeLocal(new ej.data.Query().take(8));

var table = (document.getElementById('datatable'));

result.forEach((data) => {
    table.appendChild(compiledFunction(data)[0]);
});
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Grid</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript Grid Control">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-base/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-grids/styles/material.css" rel="stylesheet">
        <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-buttons/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-popups/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-navigations/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-dropdowns/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-lists/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-inputs/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-calendars/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-splitbuttons/styles/material.css" rel="stylesheet">

    
    
<script src="https://cdn.syncfusion.com/ej2/25.2.3/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
    
    <div id="container">
        <div id="Grid"></div>
        <table id="datatable" class="e-table">
            <thead>
                <tr><th>Order ID</th><th>Customer ID</th><th>Employee ID</th></tr>
            </thead>
            <tbody>
            </tbody>    
        </table>        
    </div>

<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Remote data binding

DataManager can be bound to remote data source by assigning service end point URL to the url property. With the provided url, the DataManager handles all communication with the data server with help of queries.

When querying data, the DataManager will convert the query object(Query) into server request after calling executeQuery and waits for the server response(JSON format).

var template = '<tr><td>${OrderID}</td><td>${CustomerID}</td><td>${EmployeeID}</td></tr>';

var compiledFunction = ej.base.compile(template);

const SERVICE_URI = 'https://services.syncfusion.com/js/production/api/orders';

var table = (document.getElementById('datatable'));

new ej.data.DataManager({ url: SERVICE_URI }).executeQuery(new ej.data.Query().take(8)).then((e) => {

        (e.result).forEach((data) => {
            table.appendChild(compiledFunction(data)[0]);
        });
});
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Grid</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript Grid Control">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-base/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-grids/styles/material.css" rel="stylesheet">
        <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-buttons/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-popups/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-navigations/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-dropdowns/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-lists/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-inputs/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-calendars/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.2.3/ej2-splitbuttons/styles/material.css" rel="stylesheet">

    
    
<script src="https://cdn.syncfusion.com/ej2/25.2.3/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
    
    <div id="container">
        <div id="Grid"></div>
        <table id="datatable" class="e-table">
            <thead>
                <tr><th>Order ID</th><th>Customer ID</th><th>Employee ID</th></tr>
            </thead>
            <tbody>
            </tbody>    
        </table>        
    </div>

<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

The queried data will not be cached locally unless offline mode is enabled.

See Also