.net通用CMS快速开发框架——问题:Dapper通用的多表联合分页查询怎么破?

最近在弄一个东东,类似那种CMS的后台管理系统,方便作为其它项目的初始化框架用的。

现在遇到个问题,如标题所示:Dapper通用的多表联合分页查询怎么破?

单表的话很简单就可以实现,多表不通用的话也可以很方便的实现,那么如果多表通用的话,怎么办呢?

难道只能通过拼接sql或者使用存储过程吗?我先来展示下我的实现方式,希望你有更好的方式,然后同我分享一下,以便解决我的困扰。

因为本来就是做的传统的CMS类似的项目,所以技术选型也是比较传统,抛弃了mvvm的js框架、webapi接口、以及nosql缓存。

技术选型:MVC5、Mysql、Dapper、Autofac、Layui、阿里巴巴矢量库、T4(后面补上)。

  • MVC5:目前.net开发的主流web框架。
  • Mysql:轻量免费功能强大的关系型数据库。
  • Dapper:据说是性能最好的.net ORM框架。
  • Autofac:据说是性能最好的.net IOC框架。
  • Layui:经典的模块化UI框架,还是很适合我们这样的后端开发人员的。
  • 阿里巴巴矢量库:丰富的矢量图标库。
  • T4:强大的代码生成模板。

我选择的都是轻量级比较干净的东东来组合的框架。

我选择由外入内的方式来阐述我现在遇到的问题。以用户管理界面为例,我讲只列出涉及到用户分页查询的代码,将会省略其它代码.....

大致上的效果如下图所示:

 

 

经典的多层架构

Global.asax.cs代码,Dapper自动注入。

  public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);

            //创建autofac管理注册类的容器实例
            var builder = new ContainerBuilder();
            SetupResolveRules(builder);
            //使用Autofac提供的RegisterControllers扩展方法来对程序集中所有的Controller一次性的完成注册 支持属性注入
            builder.RegisterControllers(Assembly.GetExecutingAssembly()).PropertiesAutowired();        

            // 把容器装入到微软默认的依赖注入容器中
            var container = builder.Build();
            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
        }
        private static void SetupResolveRules(ContainerBuilder builder)
        {
            //WebAPI只用引用services和repository的接口,不用引用实现的dll。
            //如需加载实现的程序集,将dll拷贝到bin目录下即可,不用引用dll
            var iServices = Assembly.Load("RightControl.IService");
            var services = Assembly.Load("RightControl.Service");
            var iRepository = Assembly.Load("RightControl.IRepository");
            var repository = Assembly.Load("RightControl.Repository");

            //根据名称约定(服务层的接口和实现均以Services结尾),实现服务接口和服务实现的依赖
            builder.RegisterAssemblyTypes(iServices, services)
              .Where(t => t.Name.EndsWith("Service"))
              .AsImplementedInterfaces().PropertiesAutowired();

            //根据名称约定(数据访问层的接口和实现均以Repository结尾),实现数据访问接口和数据访问实现的依赖
            builder.RegisterAssemblyTypes(iRepository, repository)
              .Where(t => t.Name.EndsWith("Repository"))
              .AsImplementedInterfaces().PropertiesAutowired();
        }
    }

BaseController:

   public class BaseController : Controller
    {// GET: Base
        public virtual ActionResult Index()
        {
            return View();
        }

UserController:

    public class UserController : BaseController
    {
        private IUserService service;

        public UserController(IUserService _service)
        {
            service = _service;
        }
        /// <summary>
        /// 加载数据列表
        /// </summary>
        /// <param name="pageInfo">页面实体信息</param>
        /// <param name="filter">查询条件</param>
        /// <returns></returns>
        [HttpGet]
        public JsonResult List(PageInfo pageInfo, UserModel filter)
        {
            var result = service.GetListByFilter(filter, pageInfo);
            return Json(result, JsonRequestBehavior.AllowGet);
        }

PageInfo:

    public class PageInfo
    {
        public int page { get; set; }
        public int limit { get; set; }
        /// <summary>
        /// 排序字段 CreateOn
        /// </summary>
        public string field { get; set; }
        /// <summary>
        /// 排序方式 asc desc
        /// </summary>
        public string order { get; set; }
        /// <summary>
        /// 返回字段逗号分隔
        /// </summary>
        public string returnFields { get; set; }
        public string prefix { get; set; }
    }
View Code

UserModel:

using DapperExtensions;
using System;
using System.ComponentModel.DataAnnotations;

namespace RightControl.Model
{
    [Table("t_User")]
    public class UserModel:Entity
    {
        /// <summary>
        /// 用户名
        /// </summary>
        [Display(Name = "用户名")]
        public string UserName { get; set; }
        /// <summary>
        /// 真实名称
        /// </summary>
        [Display(Name = "真实名称")]
        public string RealName { get; set; }
        /// <summary>
        /// 密码
        /// </summary>
        public string PassWord { get; set; }
        /// <summary>
        /// 创建者
        /// </summary>
        public int CreateBy { get; set; }
        /// <summary>
        /// 角色ID
        /// </summary>
        public int RoleId { get; set; }
        /// <summary>
        /// 更新时间
        /// </summary>
        [Display(Name = "更新时间")]
        public DateTime UpdateOn { get; set; }
        [Computed]
        public string RoleName { get; set; }
    }
}
View Code

Entity:

    public class Entity
    {
        [DapperExtensions.Key(true)]
        public virtual int Id { get; set; }
        /// <summary>
        /// 创建时间
        /// </summary>
        [DataType(DataType.Date)]
        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd HH:mm:ss}")]
        [Display(Name = "创建时间")]
        public DateTime CreateOn { get; set; }
        /// <summary>
        /// 菜单状态(1:启用,0:禁用)
        /// </summary>
        public bool Status { get; set; }
        #region 查询条件
        [Computed]
        public string StartEndDate { get; set; }
        #endregion
    }

IBaseService:

    public interface IBaseService<T> where T : class, new()
    {
        dynamic GetListByFilter(T filter, PageInfo pageInfo);
    }

IUserService:

    public interface IUserService : IBaseService<UserModel>
    {
    ...
    }

BaseService:

    public abstract class BaseService<T> where T : class, new()
    {
        public IBaseRepository<T> baseRepository{get; set;}
public dynamic GetPageUnite(IBaseRepository<T> repository, PageInfo pageInfo, string where, object filter)
        {
            string _orderBy = string.Empty;
            if (!string.IsNullOrEmpty(pageInfo.field))
            {
                _orderBy = string.Format(" ORDER BY {0} {1}", pageInfo.prefix+pageInfo.field, pageInfo.order);
            }
            else
            {
                _orderBy = string.Format(" ORDER BY {0}CreateOn desc",pageInfo.prefix);
            }
            long total = 0;
            var list = repository.GetByPageUnite(new SearchFilter { pageIndex = pageInfo.page, pageSize = pageInfo.limit, returnFields = pageInfo.returnFields, param = filter, where = where, orderBy = _orderBy }, out total);

            return Pager.Paging(list, total);
        }
        protected  string CreateWhereStr(Entity filter, string _where)
        {
            if (!string.IsNullOrEmpty(filter.StartEndDate) && filter.StartEndDate != " ~ ")
            {
                var dts = filter.StartEndDate.Trim().Split('~');
                var start = dts[0].Trim();
                var end = dts[1].Trim();
                if (!string.IsNullOrEmpty(start))
                {
                    _where += string.Format(" and CreateOn>='{0}'", start + " 00:00");
                }
                if (!string.IsNullOrEmpty(end))
                {
                    _where += string.Format(" and CreateOn<='{0}'", end + " 59:59");
                }
            }

            return _where;
        }
    }

UserService:

    public class UserService: BaseService<UserModel>, IUserService
    {
        public IUserRepository repository { get; set; }//属性注入
        public dynamic GetListByFilter(UserModel filter, PageInfo pageInfo)
        {
            pageInfo.prefix = "u.";
            string _where = " t_User u INNER JOIN t_role r on u.RoleId=r.Id";
            if (!string.IsNullOrEmpty(filter.UserName))
            {
                _where += string.Format(" and {0}UserName=@UserName",pageInfo.prefix);
            }
            if (!string.IsNullOrEmpty(pageInfo.order))
            {
                pageInfo.order = pageInfo.prefix + pageInfo.order;
            }
            pageInfo.returnFields = string.Format("{0}Id,{0}UserName,{0}RealName,{0}CreateOn,{0}`PassWord`,{0}`Status`,{0}RoleId,r.RoleName",pageInfo.prefix);
            return GetPageUnite(baseRepository, pageInfo, _where, filter);
        }

IBaseRepository:

 public interface IBaseRepository<T> where T : class, new()
    {
        IEnumerable<T> GetByPageUnite(SearchFilter filter, out long total);
    }

IUserRepository:

    public interface IUserRepository : IBaseRepository<UserModel>
    {

    }

BaseRepository:

    public class BaseRepository<T>: IBaseRepository<T> where T :class, new()
    {
public IEnumerable<T> GetByPageUnite(SearchFilter filter, out long total)
        {
            using (var conn = MySqlHelper.GetConnection())
            {
                return conn.GetByPageUnite<T>(filter.pageIndex, filter.pageSize, out total, filter.returnFields, filter.where, filter.param, filter.orderBy, filter.transaction, filter.commandTimeout);
            }
        }

    }

UserRepository:

    public class UserRepository : BaseRepository<UserModel>, IUserRepository
    {
    }

最后的分页代码:

        /// <summary>
        /// 获取分页数据
        /// </summary>
        public static IEnumerable<T> GetByPageUnite<T>(this IDbConnection conn, int pageIndex, int pageSize, out long total, string returnFields = null, string where = null, object param = null,
string orderBy = null, IDbTransaction transaction = null, int? commandTimeout = null) { int skip = 0; if (pageIndex > 0) { skip = (pageIndex - 1) * pageSize; } StringBuilder sb = new StringBuilder(); sb.AppendFormat("SELECT COUNT(1) FROM {0};", where); sb.AppendFormat("SELECT {0} FROM {1} {2} LIMIT {3},{4}", returnFields, where, orderBy, skip, pageSize); using (var reader = conn.QueryMultiple(sb.ToString(), param, transaction, commandTimeout)) { total = reader.ReadFirst<long>(); return reader.Read<T>(); } }

Index视图:

@{
    Layout = "~/Views/Shared/_LayoutList.cshtml";
}

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title>Table</title>
</head>

<body>
    <div class="admin-main">
        <blockquote class="layui-elem-quote p10">
            <form id="formSearch" class="layui-form" action="">
                <div class="layui-form-item" style="margin-bottom:0px;">
                    <label class="layui-form-label">用户名称:</label>
                    <div class="layui-input-inline">
                        <input name="UserName" id="UserName" lay-verify="" autocomplete="off" class="layui-input">
                    </div>
                    <label class="layui-form-label">角色名称:</label>
                    <div class="layui-input-inline">
                        @Html.DropDownList("RoleId", null, "-请选择角色-", new Dictionary<string, object> { { "lay-verify", "required" } })
                    </div>
                    <label class="layui-form-label">状态:</label>
                    <div class="layui-input-inline">
                        @Html.StatusSelectHtml()
                    </div>
                    @Html.SearchBtnHtml()
                    @Html.ResetBtnHtml()
                    <div style="float:right;">
                        @Html.TopToolBarHtml(ViewData["ActionFormRightTop"])
                    </div>
                </div>
            </form>
        </blockquote>
        <div class="layui-field-box">
            <table id="defaultTable" lay-filter="defaultruv"></table>
            <!-- 这里的 checked 的状态只是演示 -->
            @*<input type="checkbox" name="Status"  value="{{d.Id}}"  lay-skin="switch" lay-text="开启|禁用" lay-filter="statusSwitch" {{ d.Status == 1 ? 'checked' : '' }}>*@
            <script type="text/html" id="bar">
                @Html.ToolBarHtml(ViewData["ActionList"])
            </script>
        </div>
    </div>
    <script>
        layui.config({
            base: '/plugins/app/'
        });

        layui.use(['table', 'common', 'form'], function () {
            var table = layui.table,
                form = layui.form,
                common = layui.common;
            //表格
            table.render({
                id: 'defaultReload'
               , elem: '#defaultTable'
               , height: 'full-112' //高度最大化减去差值
               , url: '/Permissions/User/List' //数据接口
               , page: true //开启分页
               , cols: [[ //表头
                 { checkbox: true, fixed: true },
                 { field: 'Id', title: 'Id', width: 80, fixed: 'left' }
                 , { field: 'UserName', title: '用户名称', sort: true }
                 , { field: 'RealName', title: '真实姓名' }
                 , { field: 'RoleName', title: '角色名称' }
                , { field: 'Status', title: '状态', templet: '<div>{{showStatus(d.Status)}}</div>', unresize: true, width: 100, align: 'center' }
                 , { field: 'CreateOn', title: '创建时间', width: 160, sort: true, templet: '<div>{{showDate(d.CreateOn)}}</div>' }
                 , { field: '', title: '操作', toolbar: "#bar" }
               ]]
            });
            var $ = layui.$, active = {
                reload: function () {
                    var jsonWhere = urlToJson($("#formSearch").serialize());
                    //执行重载
                    table.reload('defaultReload', {
                        page: {
                            curr: 1 //重新从第 1 页开始
                        }
                      , where: jsonWhere
                    });
                }
            };
            //服务器排序
            table.on('sort(defaultruv)', function (obj) {
                //尽管我们的 table 自带排序功能,但并没有请求服务端。
                //有些时候,你可能需要根据当前排序的字段,重新向服务端发送请求,如:
                table.reload('defaultReload', {
                    initSort: obj //记录初始排序,如果不设的话,将无法标记表头的排序状态。 layui 2.1.1 新增参数
                  , where: { //请求参数
                      field: obj.field //排序字段
                    , order: obj.type //排序方式
                  }
                });
            });
            $('#btnSearch').on('click', function () {
                var type = $(this).data('type');
                active[type] ? active[type].call(this) : '';
            });
            //add
            $('#btnAdd').on('click', function () {
                common.openTop({
                    title: '用户添加', w: '600px', h: '360px', content: '/Permissions/User/Add/'
                });
            });
            //监听工具条
            table.on('tool(defaultruv)', function (obj) {
                var data = obj.data;
                if (obj.event === 'detail') {
                    common.openTop({
                        detail: true,
                        title: '角色详情', w: '600px', h: '360px', content: '/Permissions/User/Detail/' + data.Id, clickOK: function (index) {
                            common.close(index);
                        }
                    });
                } else if (obj.event === 'del') {
                    layer.confirm('确定要删除吗?', function (index) {
                        $.ajax({
                            url: "/Permissions/User/Delete",
                            type: "POST",
                            data: { "Id": data.Id },
                            dataType: "json",
                            success: function (data) {
                                if (data.state == "success") {
                                    obj.del();//删除这一行
                                    common.msgSuccess("删除成功");
                                } else {
                                    common.msgError("删除失败");
                                }
                                layer.close(index);//关闭弹框
                            }
                        });
                    });
                } else if (obj.event === 'edit') {
                    common.openTop({
                        title: '用户编辑', w: '600px', h: '360px', content: '/Permissions/User/Edit/' + data.Id
                    });
                } else if (obj.event === 'reset') {
                    layer.confirm('确定要初始化密码吗?', function (index) {
                        $.ajax({
                            url: "/Permissions/User/InitPwd",
                            type: "POST",
                            data: { "Id": data.Id },
                            dataType: "json",
                            success: function (data) {
                                if (data.state == "success") {
                                    layer.close(index);//关闭弹框
                                    common.msgSuccess("密码初始化成功");
                                } else {
                                    common.msgError("密码初始化失败");
                                }
                                layer.close(index);//关闭弹框
                            }
                        });
                    });
                }
            });
        });
    </script>
</body>

</html>

_LayoutBase模板页:

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>@ViewBag.Title</title>
    <link rel="stylesheet" href="~/plugins/layui/css/layui.css" media="all" />
    <link href="~/Content/global.css" rel="stylesheet" />
    <link href="~/Content/table.css" rel="stylesheet" />
    <script src="~/plugins/layui/layui.js"></script>
    <script src="~/plugins/app/global.js"></script>
</head>
<body>
    <div id="ajax-loader" style="cursor: progress; position: fixed; top: -50%; left: -50%; width: 200%; height: 200%; background: #fff; z-index: 10000; overflow: hidden;">
        <img src="~/Content/images/ajax-loader.gif" style="position: absolute; top: 0; left: 0; right: 0; bottom: 0; margin: auto;" />
    </div>
        @RenderBody()
   <script type="text/javascript">
       layui.config({
           base: '/plugins/app/',
           version: '1522709297490' //为了更新 js 缓存,可忽略
       });
       layui.use(['common'], function () {
           layer.config({
               skin: 'layui-layer-molv'
           })
           var $ = layui.jquery;
           $(function () {
               $('#ajax-loader').fadeOut();
           })
       })     
   </script>
</body>
</html>

代码结构基本上就这样了。

作为一名有追求的程序员,当看到代码连自己都受不了,我就开始抓狂,每次写代码的时候,脑袋里都是那几句话“不要重复你的代码、依赖于抽象....”

项目详细介绍和代码获取请移步:.net项目驱动学习

posted @ 2018-04-27 14:53 邹琼俊 阅读(...) 评论(...) 编辑 收藏