jQuery EasyUI 树形菜单 - 树形网格惰性加载节点

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pre-wrap;}jQuery EasyUI 树形菜单 - 树形网格惰性加载节点有时我们已经得到充分的分层树形网格（TreeGrid）的数据。我们还想让树形网格（TreeGrid）按层次惰性加载节点。首先，只加载顶层节点。然后点击节点的展开图标来加载它的子节点。本教程展示如何创建带有惰性加载特性的树形网格（TreeGrid）。创建树形网格（TreeGrid）    <table id="test" title="Folder Browser" class="easyui-treegrid" style="width:





700px;height:





300px"            data-options="                url:





'data/treegrid_data.json',                method:





'get',                rownumbers:





true,                idField:





'id',                treeField:





'name',                loadFilter:





myLoadFilter            ">        <thead>            <tr>                <th field="name" width="220">Name</th>                <th field="size" width="100" align="right">Size</th>                <th field="date" width="150">Modified Date</th>            </tr>        </thead>    </table>为了放置加载子节点，我们需要为每个节点重命名 'children' 属性。正如下面的代码所示，'children' 属性重命名为 'children1'。当展开一个节点时，我们调用 'append' 方法来加载它的子节点数据。'loadFilter' 代码    function myLoadFilter(data,parentId){        function setData(){            var todo = [];            for(var i=0; i<data.length; i++){                todo.push(data[i]);            }            while(todo.length){                var node = todo.shift();                if (node.children){                    node.state = 'closed';                    node.children1 = node.children;                    node.children = undefined;                    todo = todo.concat(node.children1);                }            }        }                setData(data);        var tg = $(this);        var opts = tg.treegrid('options');        opts.onBeforeExpand = function(row){            if (row.children1){                tg.treegrid('append',{                    parent:





row[opts.idField],                    data:





row.children1                });                row.children1 = undefined;                tg.treegrid('expand', row[opts.idField]);            }            return row.children1 == undefined;        };        return data;    }下载 jQuery EasyUI 实例jeasyui-tree-treegrid5.zip