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Add to Persist in JavaScript (ES5) Grid control

24 May 2022 / 2 minutes to read

Persist the column template, header template and header Text

By default, the Grid properties such as column template, header text, header template, column formatter, and value accessor will not persist when enablePersistence is set to true. Because the column template and header text can be customized at the application level.

If you wish to restore all these column properties, then you can achieve it by cloning the grid’s columns property using JavaScript Object’s assign method and storing this along with the persist data manually. While restoring the settings, this column object must be assigned to the grid’s columns property to restore the column settings as demonstrated in the following sample.

Source
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index.js
index.html
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var grid = new ej.grids.Grid({
    dataSource: data,
    enablePersistence: true,
    allowFiltering: true,
    allowPaging: true,
    columns: [
        { field: 'OrderID', headerText: 'Order ID', textAlign: 'Right', width: 120 },
        { field: 'CustomerID', headerText: 'Customer ID', width: 150, headerTemplate: '#customertemplate' },
        { field: 'ShipCity', headerText: 'Ship City', width: 150 },
        { field: 'ShipName', headerText: 'Ship Name', width: 150, template: '#template'},
    ],
    height: 230
});
grid.appendTo('#Grid');

document.getElementById('restore').onclick = function () {
    savedProperties = JSON.parse(grid.getPersistData());
    var gridColumnsState = Object.assign([], grid.getColumns());
    savedProperties.columns.forEach(function (col) {
        var headerText = gridColumnsState.find(function (colColumnsState) { return colColumnsState.field === col.field; })['headerText'];
        var colTemplate = gridColumnsState.find(function (colColumnsState) { return colColumnsState.field === col.field; })['template'];
        var headerTemplate = gridColumnsState.find(function (colColumnsState) { return colColumnsState.field === col.field; })['headerTemplate'];
        col.headerText = 'Text Changed';
        col.template = colTemplate;
        col.headerTemplate = headerTemplate;
    });
    console.log(savedProperties);
    grid.setProperties(savedProperties);
};
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<!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="//cdn.syncfusion.com/ej2/20.1.57/ej2-base/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/20.1.57/ej2-grids/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/20.1.57/ej2-buttons/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/20.1.57/ej2-popups/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/20.1.57/ej2-navigations/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/20.1.57/ej2-dropdowns/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/20.1.57/ej2-lists/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/20.1.57/ej2-inputs/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/20.1.57/ej2-calendars/styles/material.css" rel="stylesheet">
    
    
    
    <link href="//cdn.syncfusion.com/ej2/20.1.57/ej2-splitbuttons/styles/material.css" rel="stylesheet">
    
    
    
    
<style>
    .e-column:before {
      content: '\e815';
    }

    .e-header:before {
      content: '\ea9a';
    }
  </style><script src="https://cdn.syncfusion.com/ej2/20.1.57/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
</head>

<body>
    <script id="template" type="text/x-template">
        <a rel='nofollow' href=https://en.wikipedia.org/wiki/${ShipName}><span class="e-icons e-column"></span></a>
    </script>
  
    <script id="customertemplate" type="text/x-template">
        <span class="e-icons e-header" ></span>
        Customer ID
    </script>
    
    <div id="container">
        <button id="restore">Restore</button>   
        <div id="Grid"></div>        
    </div>

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