本教程展示如何向带有动态加载特性的树形网格(TreeGrid)添加分页。
启用树形网格(TreeGrid)的分页特性,必须添加 'pagination:true' 属性,这样页面加载时就会向服务器发送 'page' 和 'rows' 参数。
- <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>
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;
- }
发送到服务器的参数包括:
当展开一个行节点时,'id' 值是大于 0 的。 当改变页码时,'id' 值应该被设置为 0 来放置加载子行。