MVC+Nhibernate+jquery+easyui递归实现多级菜单

1.新建访问的控制器动作返回视图，在视图中使用easyui的treegrid插件来得到后台得到的json数据显示多级菜单

 public ActionResult Menu()
        {
            return View();
        }

视图：

@{
    ViewBag.Title = "Menu";
    Layout = "~/Views/Shared/_GridView.cshtml";
}

@section header{}
@section body{
    <div id="dataGrid" class="easyui-layout" data-options="fit:true">
    <table id="gridView"></table>
</div>
    }
@section scripts{

    <script src="~/Content/oa/scripts/xlayout.js"></script>
<script type="text/javascript">
    $(function () {
        alert(22)
            load();
        });
        function load() {
            $('#gridView').treegrid({
                url: '/WxMenu/MenuGridView',
                title: '微信菜单配置',
                treeField: 'Text',
                fit: true,
                fitColumns: true,
                idField: 'Id',
                loadMsg: '数据正在加载中......',
                sortName: 'Orderby',
                sortOrder: 'asc',
                pagination: true,
                singleSelect: true,
                pageSize: 15,
                pageNumber: 1,
                pageList: [15, 30, 45, 60],
                queryParams: {},
                rownumbers: true,
                checkOnSelect: true,
                selectOnCheck: true,
                lines: true,
                columns: [[
                        { field: 'ck', checkbox: true,  50 },
                        { field: 'Text', title: '菜单名字',  160, align: 'left' },
                        {
                            field: 'MenuId', title: '菜单编码',  100, align: 'left',
                            formatter: function (value, row, index) {
                                return value == "-1" ? "" : value;
                            }
                        },
                        {
                            field: 'IsEnable', title: '有效',  50, align: 'center',
                            formatter: function (value, row, index) {
                                return "<span style="color:{1};">{0}</span>".format(
                                    value == "1" ? "已启用" : "已禁用",
                                    value == "1" ? "green" : "red");
                            }
                        },
                        { field: 'OrderBy', title: '排序号',  80, align: 'left' },
                        {
                            field: 'Target', title: '动作类型',  100, align: 'center',
                            formatter: function (value, row, index) {
                                switch (value) {
                                    case 'view':
                                        return "跳转URL";
                                    case 'click':
                                        return "点击推事件";
                                    case 'scancode_push':
                                        return "扫码推事件";
                                    case 'scancode_waitmsg':
                                        return "扫码推事件且弹出(消息接收中)提示框";
                                    case 'pic_sysphoto':
                                        return "弹出系统拍照发图";
                                    case 'pic_photo_or_album':
                                        return "弹出拍照或者相册发图";
                                    case 'pic_weixin':
                                        return "弹出微信相册发图器";
                                    case 'location_select':
                                        return "弹出地理位置选择器";
                                    case 'media_id':
                                        return "下发消息（除文本消息）";
                                    case 'view_limited':
                                        return "跳转图文消息URL";
                                }
                            }
                        },
                        { field: 'Ico', title: 'MenuKey',  100, align: 'left' },
                        { field: 'Url', title: '菜单URL',  300, align: 'left' }
                ]],
                toolbar: [{
                    id: 'btnAdd',
                    text: '添加',
                    iconCls: 'icon-add',
                    handler: function () {
                        showWindow("添加菜单", "/OA/WeiXin/MenuEdit/0", 700, 400);
                    }
                }, {
                    id: 'btnAdd',
                    text: '编辑',
                    iconCls: 'icon-edit',
                    handler: function () {
                        var row = $('#gridView').datagrid('getSelected');
                        if (!row) {
                            showMsg("系统提示", "请选择要编辑的行", true);
                            return;
                        }
                        if (row.Id == "0") {
                            showMsg("系统提示", "此数据不能修改", true);
                            return;
                        }

                        showWindow("添加菜单", "/OA/WeiXin/MenuEdit/" + row.Id, 700, 400);
                    }
                },
                {
                    id: 'btnDelete',
                    text: '删除',
                    iconCls: 'icon-remove',
                    handler: function () {
                        var rows = $('#gridView').datagrid('getChecked');
                        if (!rows || rows.length == 0) {
                            showMsg("系统提示", "请选择要删除的行", true);
                            return;
                        }

                        showConfirm('系统提示', '删除数据后将无法恢复，还确认删除吗?', function () {
                            var ids = new Array();
                            var isRoot = false;
                            $.each(rows, function (i, n) {
                                ids.push("'" + n.Id + "'");
                                isRoot = n.MenuId == "10000";
                                if (isRoot) return false;
                            });
                            if (isRoot) {
                                showMsg("系统提示", "菜单(微信公众平台菜单)不能删除！", true);
                                return;
                            }

                            showProcess(true, "系统提示", "正在删除中......");
                            setTimeout(function () {
                                $.ajax({
                                    url: "/OA/WeiXin/MenuDelete",
                                    data: { ids: ids.toString(",") },
                                    dataType: "json",
                                    type: "POST",
                                    traditional: true,
                                    success: function (result) {
                                        showProcess(false);
                                        if (result.Success) {
                                            showMsg("系统提示", result.Message, false);
                                            $('#gridView').datagrid('reload');
                                        } else {
                                            showMsg("系统提示", result.Message, true);
                                        }
                                    }
                                });
                            }, 2000);
                        });
                    }
                }, {
                    id: 'btnRefresh',
                    text: '更新',
                    iconCls: 'icon-reload',
                    handler: function () {
                        $('#gridView').treegrid('reload');
                    }
                }, {
                    id: 'btnRefresh',
                    text: '发布到微信公众平台',
                    iconCls: 'icon-redo',
                    handler: function () {
                        $.ajax({
                            url: "/WxMenu/MenuToWeiXin",
                            data: {},
                            dataType: "json",
                            type: "POST",
                            traditional: true,
                            beforeSend: function () {
                                showProcess(true, "系统提示", "正发布到微信公众平台......");
                            },
                            error: function () {
                            },
                            success: function (result) {
                                showMsg("系统提示", result.Message, false);
                            },
                            complete: function () {
                                showProcess(false);
                            }
                        });
                    }
                }],
                onLoadSuccess: function () {
                    var pager = $('#gridView').treegrid('getPager');
                    pager.pagination({
                        beforePageText: '第',
                        afterPageText: '页    共 {pages} 页',
                        displayMsg: '当前显示 {from} - {to} 条记录   共 {total} 条记录',
                        buttons: []
                    });
                }

            });
        }

        function radWindowCallBackFn() {
            showMsg("系统提示", "存盘成功！", false);
            $('#gridView').treegrid('reload');
        }
</script>}

2. 后台动作返回一个content()。

  public ActionResult MenuGridView(int? page, int? rows, string sort = "", string order = "asc")
        {
            return Content(GetMenuGridTree());
        }

3.通过GetMenuGridTree()函数来返回一个json对象：

public string GetMenuGridTree()
        {
            NHibernateHelper nhlper = new NHibernateHelper();
            ISession session = nhlper.GetSession();
            List<TreeModel> result = new List<TreeModel>();
            List<TreeModel> children = new List<TreeModel>();
            IEnumerable<WeiXinMenu> kinds = session.Query<WeiXinMenu>();
            WeiXinMenu root = kinds.FirstOrDefault(c => c.ParentId == "-1");
            GetMenuGridTree(kinds, children, "10000");
            result.Add(new TreeModel
            {
                Id = root.Id.ToString(),
                MenuId = root.MenuId,
                Text = root.MenuName,
                Url = root.MenuUrl,
                ParentMenuId = root.ParentId.ToString(),
                IsEnable = root.IsEnable,
                OrderBy = root.OrderBy.ToString(),
                Target = root.MenuType,
                Ico = root.MenuKey,
                children = children
            });
            return JsonConvert.SerializeObject(result);
        }

其中NHibernateHelper是申明了一个Nhibernate的辅助类，用来建立一个isessionfactory（会话工厂），然后打开一个isession，如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using NHibernate;
using NHibernate.Cfg;

namespace Data
{
    public class NHibernateHelper
    {
        private ISessionFactory _sessionFactory;
        public NHibernateHelper()
        {
            //创建ISessionFactory
            _sessionFactory = GetSessionFactory();
        }
        public ISessionFactory GetSessionFactory()
        {
            //配置ISessionFactory
            return (new Configuration()).Configure().BuildSessionFactory();
        }
        public ISession GetSession()
        {
            return _sessionFactory.OpenSession();
        }
    }
}

 其中TreeModel类，是创建一个有递归子类的数据库存的菜单表的类。跟我们在Nhibernate中持久化实体的菜单类似，如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Domain.OrmLib.Model
{
        public class TreeModel
        {
            public string Id { get; set; }
            public string MenuId { get; set; }
            public string Text { get; set; }
            public string Url { get; set; }
            public string Ico { get; set; }
            public string ParentMenuId { get; set; }
            public string IsEnable { get; set; }
            public string OrderBy { get; set; }
            public string Target { get; set; }
            public string IsStretch { get; set; }
            public string IsEdit { get; set; }
            public string IsDelete { get; set; }
            public string Remark { get; set; }
            public string state { get; set; }
            public string iconCls { get; set; }
            public List<TreeModel> children { get; set; }
        }
    
}

其中IEnumerable<WeiXinMenu> kinds = session.Query<WeiXinMenu>();这句就是通过Nhibernate的会话isession查询到并枚举我们的实体WeiXinMenu。先把root根部的实体查询出来。

GetMenuGridTree()方法就是递归的调用得到剩下的chilren.

 private void GetMenuGridTree(IEnumerable<WeiXinMenu> kinds, List<TreeModel> children, string pId)
        {
            foreach (WeiXinMenu p in kinds.Where(c => c.ParentId == pId).OrderBy(c => c.OrderBy))
            {
                TreeModel gt = new TreeModel();
                gt.Id = p.Id.ToString();
                gt.MenuId = p.MenuId;
                gt.Text = p.MenuName;
                gt.Url = p.MenuUrl;
                gt.ParentMenuId = p.ParentId;
                gt.IsEnable = p.IsEnable;
                gt.OrderBy = p.OrderBy.ToString();
                gt.Target = p.MenuType;
                gt.Ico = p.MenuKey;

                List<TreeModel> childrenTmp = new List<TreeModel>();

                GetMenuGridTree(kinds, childrenTmp, p.MenuId);

                /*
                if (childrenTmp.Count > 0)
                {
                    gt.state = "closed";
                }
                */

                gt.children = childrenTmp;

                children.Add(gt);
            }
        }