作者：秋名
撰写时间：2020 年05 月05日
需求：
1，计算父节点里有几个子节点，显示数量

** 后台CS **

   /// <summary>
    public class TreeVo //计算当前父节点，有几个子节点
{
    public int? ParentID { get; set; }
    public int? SonID { get; set; }
    public string NodeName { get; set; }
    public int? SupplierParentID { get; set; }
    public int? SupplierSonID { get; set; }
}
            ///权限组用户树形图
            /// </summary>
            /// <returns></returns>
            public JsonResult Get_TreeView()
            {
                List<Dictionary<string, object>> jsonlist = new List<Dictionary<string, object>>();
                List<TreeVo> treeList = new List<TreeVo>();
                var listSuShe = (from TbTrees in myModel.HB宿管楼栋
                                 select new
                                 {
                                     宿舍楼栋ID = TbTrees.宿舍楼栋ID,//父亲id
                                     宿舍楼栋MC = TbTrees.宿舍楼栋MC.Trim(),////儿子id  
                                     宿舍楼层ID = TbTrees.宿舍楼层ID//节点名
                                 }).ToList();
                for (int i = 0; i < listSuShe.Count; i++)
                {
                    TreeVo tree = new TreeVo();
                    tree.ParentID = listSuShe[i].宿舍楼栋ID;//父亲id  
                    tree.SonID = listSuShe[i].宿舍楼层ID;//儿子id
                    if (listSuShe[i].宿舍楼层ID == 0)
                    {
                        int J = int.Parse(tree.ParentID.ToString());
                        int Count = (from tbJurisdictionGroupUser in myModel.HB宿管楼栋
                                     where tbJurisdictionGroupUser.宿舍楼层ID == J
                                     select tbJurisdictionGroupUser).Count();
                        tree.NodeName = listSuShe[i].宿舍楼栋MC.ToString().Trim() + "（" + Count + "）";//节点名
                    }
                    else
                    {
                        tree.NodeName = listSuShe[i].宿舍楼栋MC.ToString().Trim();//节点名
                    }
                    treeList.Add(tree);
                }
                    foreach (var model in treeList)
                    {
                        Dictionary<string, object> jsonobj = new Dictionary<string, object>();
                        jsonobj.Add("id", model.ParentID); //父亲id
                        jsonobj.Add("pId", model.SonID);//儿子id
                        jsonobj.Add("name", model.NodeName);//节点名称
                                                            //jsonobj.Add("icon", "");
                        jsonlist.Add(jsonobj);
                }
                return Json(jsonlist, JsonRequestBehavior.AllowGet);
            }
           
    }

Html

 <div class="zTreeDemoBackground left">
  <ul id="tree" class="ztree" style="width:200px; margin:0 5%;background: #fff;border:none;"></ul>
 </div>

Js

 function TreeView() {
            $.ajax({
                type: "Get",
                url: "Get_TreeView",//请求后台数据
                async: false,
                success: function (data) {
                    console.log(data)
                    var treeObj= $.fn.zTree.init($("#tree"), setting, data);
                    treeObj.expandAll(true);//是否默认展开节点
                }
            });
        }
        var setting = {
            check: {
                enable: false,
                chkStyle: "checkbox",
                chkboxType: { "Y": "ps", "N": "ps" },
                isSimpleData: true,              //数据是否采用简单 Array 格式，默认false
                treeNodeKey: "id",               //在isSimpleData格式下，当前节点id属性
                treeNodeParentKey: "pId",        //在isSimpleData格式下，当前节点的父节点id属性
                showLine: true,                  //是否显示节点间的连线
                checkable: true
            },
            data: {
                simpleData: {
                    enable: true
                }
            },
            callback: {
                onClick: zTreeOnClick
            }
        };
        function zTreeOnClick(event, treeId, treeNode) {
            console.log(treeNode)
        }