You can change the column headerText
dynamically through an external button.
Follow the given steps to change the header text dynamically:
Step 1:
Get the column object corresponding to the field name by using the getColumnByField
method.
Then, change the header text value.
let column = treegrid.getColumnByField("taskName"); // Get column object.
column.headerText = 'Changed Text';
Step 2:
To reflect the changes in the treegrid header, invoke the refreshColumns
method.
treegrid.refreshColumns();
var treegrid = new ej.treegrid.TreeGrid({
dataSource: sampleData,
childMapping: 'subtasks',
treeColumnIndex: 1,
columns: [
{ field: 'taskID', headerText: 'Task ID', width: 90, textAlign: 'Right' },
{ field: 'taskName', headerText: 'Task Name', width: 180, textAlign: 'Left' },
{ field: 'startDate', headerText: 'Start Date', width: 90, textAlign: 'Right', type: 'date', format: 'yMd'},
{ field: 'duration', headerText: 'Duration', width: 80, textAlign: 'Right' }
],
});
treegrid.appendTo('#TreeGrid');
var button = new ej.buttons.Button({}, '#change-text');
document.getElementById('change-text').addEventListener('click', () => { // changing the header text for taskName column.
var column = treegrid.getColumnByField("taskName"); // get the JSON object of the column corresponding to the field name.
column.headerText = "Changed Text"; // assign a new header text to the column.
treegrid.refreshColumns();
});
#container {
visibility: hidden;
}
#loader {
color: #008cff;
font-family: 'Helvetica Neue','calibiri';
font-size: 14px;
height: 40px;
left: 45%;
position: absolute;
top: 45%;
width: 30%;
}
<!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/ej2-base/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/ej2-grids/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/ej2-treegrid/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/ej2-dropdowns/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/ej2-calendars/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
</head>
<body>
<div id="container">
<button id="change-text"> Change Header Text</button>
<div id="TreeGrid"></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>