MVC_CRUD/Scripts/datatable/examples/advanced_init/row_grouping.html

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<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<link rel="shortcut icon" type="image/ico" href="http://www.datatables.net/favicon.ico">
	<meta name="viewport" content="initial-scale=1.0, maximum-scale=2.0">
	<title>DataTables example - Row grouping</title>
	<link rel="stylesheet" type="text/css" href="../../media/css/jquery.dataTables.css">
	<link rel="stylesheet" type="text/css" href="../resources/syntax/shCore.css">
	<link rel="stylesheet" type="text/css" href="../resources/demo.css">
	<style type="text/css" class="init">
	
tr.group,
tr.group:hover {
	background-color: #ddd !important;
}

	</style>
	<script type="text/javascript" language="javascript" src="//code.jquery.com/jquery-1.12.4.js">
	</script>
	<script type="text/javascript" language="javascript" src="../../media/js/jquery.dataTables.js">
	</script>
	<script type="text/javascript" language="javascript" src="../resources/syntax/shCore.js">
	</script>
	<script type="text/javascript" language="javascript" src="../resources/demo.js">
	</script>
	<script type="text/javascript" language="javascript" class="init">
	

$(document).ready(function() {
	var table = $('#example').DataTable({
		"columnDefs": [
			{ "visible": false, "targets": 2 }
		],
		"order": [[ 2, 'asc' ]],
		"displayLength": 25,
		"drawCallback": function ( settings ) {
			var api = this.api();
			var rows = api.rows( {page:'current'} ).nodes();
			var last=null;

			api.column(2, {page:'current'} ).data().each( function ( group, i ) {
				if ( last !== group ) {
					$(rows).eq( i ).before(
						'<tr class="group"><td colspan="5">'+group+'</td></tr>'
					);

					last = group;
				}
			} );
		}
	} );

	// Order by the grouping
	$('#example tbody').on( 'click', 'tr.group', function () {
		var currentOrder = table.order()[0];
		if ( currentOrder[0] === 2 && currentOrder[1] === 'asc' ) {
			table.order( [ 2, 'desc' ] ).draw();
		}
		else {
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