.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？
Posted life is not only coding......
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了.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？相关的知识，希望对你有一定的参考价值。
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; } }
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; } } }
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: "以上是关于.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？的主要内容，如果未能解决你的问题，请参考以下文章