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Select grid rows based on certain condition

You can select the specific row in the grid based on a certain condition by using the selectRows method in the dataBound event of Grid.

In the below demo, we have selected the grid rows only when EmployeeID column value greater than 3.

Source
Preview
index.js
index.html
ej.grids.Grid.Inject(ej.grids.Page);
var selIndex = [];
var grid = new ej.grids.Grid({
    dataSource: data,
    allowPaging: true,
    selectionSettings: {type: "Multiple"},
    columns: [
        { field: 'OrderID', headerText: 'Order ID', isPrimaryKey: true, textAlign: 'Right', width: 100 },
        { field: 'CustomerID', headerText: 'Customer ID', width: 120 },
        { field: 'EmployeeID', headerText: 'Employee ID', textAlign: 'Right', width: 150 },
        { field: 'ShipCity', headerText: 'Ship City',  width: 100 },
        { field: 'ShipName', headerText: 'Ship Name',  width: 100 }
    ],
    height: 220,
    rowDataBound: function(args) {
        if (args.data['EmployeeID'] > 3) {
            selIndex.push(parseInt(args.row.getAttribute('aria-rowindex')));
        }
    },
    dataBound: function(args) {
        if (selIndex.length) {
            this.selectRows(selIndex);
            selIndex = [];
        }
    }
});
grid.appendTo('#Grid');
<!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-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">
        <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>