Bootstrap 트리 구성 요소 jqTree_javascript 기술의 간단한 캡슐화

(function ($) {
  //使用js的严格模式
  'use strict';

  $.fn.jqtree = function (options) {
    //合并默认参数和用户传过来的参数
    options = $.extend({}, $.fn.jqtree.defaults, options || {});

    var that = $(this);
    var strHtml = "";
    //如果用户传了data的值，则直接使用data，否则发送ajax请求去取data
    if (options.data) {
      strHtml = initTree(options.data);
      that.html(strHtml);
      initClickNode();
    }
    else {
      //在发送请求之前执行事件
      options.onBeforeLoad.call(that, options.param);
      if (!options.url)
        return;
      //发送远程请求获得data
      $.getJSON(options.url, options.param, function (data) {
        strHtml = initTree(data);
        that.html(strHtml);
        initClickNode();

        //请求完成之后执行事件
        options.onLoadSuccess.call(that, data);
      });
    }

    //注册节点的点击事件
    function initClickNode() {
      $('.tree li').addClass('parent_li').find(' > span').attr('title', '收起');
      $('.tree li.parent_li > span').on('click', function (e) {
        var children = $(this).parent('li.parent_li').find(' > ul > li');
        if (children.is(":visible")) {
          children.hide('fast');
          $(this).attr('title', '展开').find(' > i').addClass('icon-plus-sign').removeClass('icon-minus-sign');
        } else {
          children.show('fast');
          $(this).attr('title', '收起').find(' > i').addClass('icon-minus-sign').removeClass('icon-plus-sign');
        }

        $('.tree li[class="parent_li"]').find("span").css("background-color", "transparent");
        $(this).css("background-color", "#428bca");

        options.onClickNode.call($(this), $(this));
      });
    };

    //递归拼接html构造树形子节点
    function initTree(data) {
      var strHtml = "";
      for (var i = 0; i < data.length; i++) {
        var arrChild = data[i].nodes;
        var strHtmlUL = "";
        var strIconStyle = "icon-leaf";
        if (arrChild && arrChild.length > 0) {
          strHtmlUL = "<ul>";
          strHtmlUL += initTree(arrChild) + "</ul>";
          strIconStyle = "icon-minus-sign";
        }
        
        strHtml += "<li id=\"li_" + data[i].id + "\"><span id=\"span_" + data[i].id + "\"><i class=\"" + strIconStyle + "\"></i>" + data[i].text + "</span>" + strHtmlUL + "</li>";

      }
      return strHtml;
    };
  };

  //默认参数
  $.fn.jqtree.defaults = {
    url: null,
    param: null,
    data: null,
    onBeforeLoad: function (param) { },
    onLoadSuccess: function (data) { },
    onClickNode: function (selector) { }
  };

})(jQuery);

<div class="tree well">
  <ul id="ul_tree">
  </ul>
</div>

var testdata = [{
  id: '1',
  text: '系统设置',
  nodes: [{
    id: '11',
    text: '编码管理',
    nodes: [{
      id: '111',
      text: '自动管理',
      nodes: [{
        id: '1111',
        text: '手动管理',
        nodes: [{
          id: '11111',
          text: '底层管理',
        }]
      }]
    }]
  }]
}, {
  id: '2',
  text: '基础数据',
  nodes: [{
    id: '21',
    text: '基础特征'
  }, {
    id: '22',
    text: '特征管理'
  }]
}];

$(function () {
  $("#ul_tree").jqtree({
    data: testdata,
    param: { },
    onBeforeLoad: function (param) {
    },
    onLoadSuccess: function (data) { 
    },
    onClickNode: function (selector) {
    }
  });
});

 public class Tree
  {
    public string id { get; set; }
    public string text { get; set; }
    public object nodes { get; set; }
  }



　　　　 //返回tree的节点数据
    public JsonResult GetTreeData()
    {
      var lstRes = GetNode(1);
      return Json(lstRes, JsonRequestBehavior.AllowGet);
    }

    public List<Tree> GetNode(int iNum)
    {
      var lstRes = new List<Tree>();
      if (iNum > 5)
      {
        return lstRes;
      }
      for (var i = 1; i < 3; i++)
      {
        var oNode = new Tree { id = Guid.NewGuid().ToString(), text = iNum + "级节点" + i };
        var lstRes2 = GetNode(iNum + 1);
        oNode.nodes = lstRes2;
        lstRes.Add(oNode);
      }
      return lstRes;
    }

$(function () {
  $("#ul_tree").jqtree({
    url: "/Home/GetTreeData",
    param: { },
    onBeforeLoad: function (param) {
    },
    onLoadSuccess: function (data) {
    },
    onClickNode: function (selector) {
    }
  });
});