Ztree 默认展开二级菜单

在初始加载树形控件的时候调用zTree的expandNode (node, expandFlag, sonSign, focus, callbackFlag)方法

node：树形节点

expandFlag:是否展开节点

sonSign：是否展开其子孙节点

focus：展开或折叠节点后是否设置焦点

callbackFlag：这行该方法是否触发回调函数

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var zNodes = "";           var setting = {             check: {                 enable: true             },             data: {//数据加载                 keep: {                     parent: true,                     leaf: true                 },                 simpleData: {                     enable: true,                     idKey: "Id",                     pIdKey: "Pid",                 },                 key: {                     name: "Name"                 }             }         };   function Inint() {//初始化加载节点             $.ajax({                 global: true,                 async: false,                 cache: false,                 dataType: "json",                 url: '../Ajax/test.ashx',                 type: "post",                 //data: { "roleId": GetQueryString("roleId") },                 success: function (data) {                     zNodes = data;                 }             });         };   $(function () {             Inint(); //加载数据             $.fn.zTree.init($("#zTree"), setting, zNodes);               var treeObj = $.fn.zTree.getZTreeObj("zTree");             var nodes = treeObj.getNodes();             for (var i = 0; i < nodes.length; i++) { //设置节点展开                 treeObj.expandNode(nodes[i], true, false, true);             }         });

 

<div class="control" style="overflow: auto; height:270px;">
            <ul id="zTree">
            </ul>
</div>