C#使用Jquery zTree实现树状结构显示 异步数据加载

c#使用jquery ztree实现树状结构显示_异步数据加载

jquery-ztree下载地址：https://github.com/ztree/ztree_v3

jquery-ztree数结构演示页面： 

关于ztree的详细解释请看演示页面，还有ztree帮助demo。 

下面简要讲解下本人用到的其中一个实例（直接上关键代码了）：

异步加载节点数据： 

a-前台：

<link href="ztree_v3-master/css/ztreestyle/ztreestyle.css" rel="stylesheet" />
 <script src="ztree_v3-master/js/jquery.ztree.core.js" type="text/javascript"></script>
 <script language="javascript" type="text/javascript">
 var setting = {
  async: {
   enable: true,
   url: "../handler/shoppinghandler.ashx", //请求的一般处理程序
   autoparam: ["id"],       //自带参数id--来自于节点id
   otherparam: { "type": "getuserlevellist" }, //其他参数自定义
   datafilter: filter, //数据过滤
   type: "post" //请求方式
  }
 };

 function filter(treeid, parentnode, childnodes) {
  if (!childnodes) return null;
  for (var i = 0, l = childnodes.length; i < l; i++) {
   childnodes[i].name = childnodes[i].name.replace(/\.n/g, '.');
  }
  return childnodes;
 }

 $(document).ready(function () {
  $.fn.ztree.init($("#treedemo"), setting); //渲染树结构
 });
 </script>
<div class="ztreedemobackground left">
  <ul id="treedemo" class="ztree"></ul>
</div>

b后台：

using mobilebusiness.common.data;
using mobilebusiness.library.passport;
using mobilebusiness.shopping.data;
using mobilebusiness.shopping.data.common;
using mobilebusiness.shopping.data.entity;
using mobilebusiness.web.library.script;
using newtonsoft.json;
using system;
using system.collections.generic;
using system.linq;
using system.web;
using shoppingdata = mobilebusiness.shopping.data.entity;

namespace mobilebusiness.shopping.businessmanage.handler
{
 /// <summary>
 /// shopping 的摘要说明
 /// </summary>
 public class shoppinghandler : ihttphandler
 {
  //当前登录用户信息
  wechatuser wechatuser = wechatidentity.currentuser;

  public void processrequest(httpcontext context)
  {
   string result = "";
   if (context.request["type"] != null)
   {
    string requesttype = context.request["type"];

    try
    {
     switch (requesttype)
     {
      //获取用户信息等级列表
      case "getuserlevellist":
       result = this.getuserlevellist(context); break;
      default:
       break;
     }
    }
    catch (exception ex)
    {
     result = ex.message;
    }
   }

   context.response.contenttype = "text/html";
   context.response.write(result);
   context.response.end();
  }

  private string getuserlevellist(httpcontext context)
  {
   string parentuserphone = context.request["id"];
   return getusercollbyphone(parentuserphone);
  }
  private string getusercollbyphone(string phone)
  {
   //编码，父编码，名称，是否打开，打开图片，关闭图片
   //{ id:1, pid:0, name:"展开、折叠 自定义图标不同", open:true, iconopen:"../../../css/ztreestyle/img/diy/1_open.png", iconclose:"../../../css/ztreestyle/img/diy/1_close.png"},
   //编码，父编码，名称，是否打开，显示图片
   //{ id: 11, pid: 1, name: "叶子节点1", icon: "../../../css/ztreestyle/img/diy/2.png"},
   list<object> result = new list<object>();

   shoppingdata.userinfocollection usercoll = shoppingdata.userinfoadapter.instance.loadbyparentuserphone(phone);
   usercoll.foreach(user =>
   {
    result.add(new
    {
     id = user.phone,
     pid = phone,
     name = user.username,
     isparent = shoppingdata.userinfoadapter.instance.loadbyparentuserphone(user.phone).count > 0 ? true : false
    });
   });
   return jsonconvert.serializeobject(result);
  }
  public bool isreusable
  {
   get
   {
    return false;
   }
  }
 }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。