jquery zTree异步加载、模糊搜索简单实例分享

本文实例为大家讲解了jquery zTree树插件的基本使用方法，具体内容如下

一、节点模糊搜索功能：搜索成功后，自动高亮显示并定位、展开搜索到的节点。

二、节点异步加载：1、点击展开时加载数据；2、选中节点时加载数据。
前台代码如下：

后台代码（后台返回Json数据）：

 public void SelStudent()
 {
 set("getStudentsJsonUrl", to(GetStudentsJson));
 }

 public void GetStudentsJson()
 {
 List> dicList = new List>();

 string level = ctx.Post("level");
 string id = ctx.Post("id");
 if (strUtil.IsNullOrEmpty(id))
 {
 #region 加载班级
 //获取当前登录用户
 Sys_User user = AdminSecurityUtils.GetLoginUser(ctx);
 //获取当前用户关联的老师
 Edu_Teacher teacher = edu_TeacService.FindByUserId(user.Id);
 //获取班级集合
 List list = edu_ClaNameFlowService.GetListByTeacherId(teacher.Id);
 foreach (Edu_ClaNameFlow item in list)
 {
 Dictionary dic = new Dictionary();
 dic.Add("id", "level0" + item.Calss.Id.ToString());
 dic.Add("pId", "0");
 dic.Add("name", item.Gra.Name + item.Calss.Name);
 dic.Add("isParent", "true");
 dicList.Add(dic);
 }
 #endregion
 }
 else
 {
 if (level == "0")
 {
 //加载学生
 List list = edu_StudService.GetListByClassId(id.Replace("level0", ""));
 foreach (Edu_Student item in list)
 {
 Dictionary dic = new Dictionary();
 dic.Add("id", "level1" + item.Id.ToString());
 dic.Add("pId", id);
 dic.Add("name", item.Name);
 dic.Add("isParent", "false");
 dicList.Add(dic);
 }
 }
 }

 echoJson(dicList);
 }

三、基于cookie实现zTree树刷新后，展开状态不变

1、除了引用jQuery和zTree的JS外，引用cookie的JS：
复制代码 代码如下:

2、JS代码：

$(function () {
 //ztree设置
 var setting = {
 data: {
  simpledata: {
  enable: true,
  idKey: "id",
  pIdKey: "pId",
  rootPId: null
  }
 },
 callback: {
  onExpand: onExpand,
  onCollapse: onCollapse
 }
 };

 $.ajax({
 type: "POST",
 url: "/Tech/TemplateTypeManage/GetData",
 success: function (data) {
  if (data && data.length != 0) {
  $.fn.zTree.init($("#tree"), setting, data);
  var treeObj = $.fn.zTree.getZTreeObj("tree");
  var cookie = $.cookie("z_tree" + window.location);
  if (cookie) {
   z_tree = JSON2.parse(cookie);
   for (var i = 0; i < z_tree.length; i++) {
   var node = treeObj.getNodeByParam('id', z_tree[i])
   treeObj.expandNode(node, true, false)
   }
  }
  }
 }
 });
});//end $

function onExpand(event, treeId, treeNode) {
 var cookie = $.cookie("z_tree" + window.location);
 var z_tree = new Array();
 if (cookie) {
 z_tree = JSON2.parse(cookie);
 }
 if ($.inArray(treeNode.id, z_tree) < 0) {
 z_tree.push(treeNode.id);
 }
 $.cookie("z_tree" + window.location, JSON2.stringify(z_tree))
}

function onCollapse(event, treeId, treeNode) {
 var cookie = $.cookie("z_tree" + window.location);
 var z_tree = new Array();
 if (cookie) {
 z_tree = JSON2.parse(cookie);
 }
 var index = $.inArray(treeNode.id, z_tree);
 z_tree.splice(index, 1);
 for (var i = 0; i < treeNode.children.length; i++) {
 index = $.inArray(treeNode.children[i].id, z_tree);
 if (index > -1) z_tree.splice(index, 1);
 }
 $.cookie("z_tree" + window.location, JSON2.stringify(z_tree))
}

更多关于ztree控件的内容，请参考专题《jQuery插件ztree使用汇总》

以上就是关于树插件zTree异步加载、模糊搜索简单实例讲解，希望对大家的学习有所帮助。