jEasyUI tree grid adds pagination

This tutorial shows how to add pagination to a tree grid (TreeGrid) with dynamic loading features.

Create tree grid (TreeGrid)

To enable the pagination feature of tree grid (TreeGrid), you must add the 'pagination:true' attribute, so that the page will Send 'page' and 'rows' parameters to the server.

	<table title="Products" class="easyui-treegrid" style="width:700px;height:300px"
			data-options="
				url: 'treegrid4_getdata.php',
				rownumbers: true,
				pagination: true,
				pageSize: 2,
				pageList: [2,10,20],
				idField: 'id',
				treeField: 'name',
				onBeforeLoad: function(row,param){
					if (!row) {	// load top level rows
						param.id = 0;	// set id=0, indicate to load new page rows
					}
				}
			">
		<thead>
			<tr>
				<th field="name" width="250">Name</th>
				<th field="quantity" width="100" align="right">Quantity</th>
				<th field="price" width="150" align="right" formatter="formatDollar">Price</th>
				<th field="total" width="150" align="right" formatter="formatDollar">Total</th>
			</tr>
		</thead>
	</table>

Server-side code

treegrid4_getdata.php

$page = isset($_POST['page']) ? intval($_POST['page']) : 1;
$rows = isset($_POST['rows']) ? intval($_POST['rows']) : 10;
$offset = ($page-1)*$rows;

$id = isset($_POST['id']) ? intval($_POST['id']) : 0;

include 'conn.php';

$result = array();
if ($id == 0){
	$rs = mysql_query("select count(*) from products where parentId=0");
	$row = mysql_fetch_row($rs);
	$result["total"] = $row[0];
	
	$rs = mysql_query("select * from products where parentId=0 limit $offset,$rows");
	$items = array();
	while($row = mysql_fetch_array($rs)){
		$row['state'] = has_child($row['id']) ? 'closed' : 'open';
		array_push($items, $row);
	}
	$result["rows"] = $items;
} else {
	$rs = mysql_query("select * from products where parentId=$id");
	while($row = mysql_fetch_array($rs)){
		$row['state'] = has_child($row['id']) ? 'closed' : 'open';
		$row['total'] = $row['price']*$row['quantity'];
		array_push($result, $row);
	}
}

echo json_encode($result);

function has_child($id){
	$rs = mysql_query("select count(*) from products where parentId=$id");
	$row = mysql_fetch_array($rs);
	return $row[0] > 0 ? true : false;
}

The parameters sent to the server include:

• page: to be loaded The current page.

• rows: page size.

• id: The id value of the parent row to which the row returned from the server will be added.

When expanding a row node, the 'id' value is greater than 0. When changing the page number, the 'id' value should be set to 0 to place the loading subrow.

Download jQuery EasyUI instance

jeasyui-tree-treegrid4.zip