一步一步建立ASP.NET MVC5程序[Repository+Autofac+Automapper+SqlSugar](四)

前言

上一篇《一步一步建立ASP.NET MVC5程序[Repository+Autofac+Automapper+SqlSugar](三)》,咱們完成了:git

* 引用SqlSugar
* 使用SqlSugar對Repository類的改造

併成功使用PostRepository來查詢到了數據,今天咱們來建立一個新的服務層以及安裝配置依賴注入框架組件Autofac等。github

本篇知識要點

* 建立服務層:TsBlog.Services
* 建立服務接口
* 實現服務接口
* 建立倉儲接口
* 安裝Autofac依賴注入組件
* 註冊配置Autofac 依賴注入

教程內容

建立服務層

選中解決方案中的解決方案文件夾[1.Libraries],右鍵單擊=>>添加=>>新項目,在彈出的對話框中添加一個.NET Framework 4.6.2的C#類庫項目,命名爲:TsBlog.Services。項目建立成功後,刪除自動生成的Class1.cs文件。web

因爲服務層須要依賴於倉儲層,因此首先切換到倉儲層[TsBlog.Repositories]項目中,建立博文的倉儲接口類:IPostRepository,代碼以下:sql

using System.Collections.Generic;
using TsBlog.Domain.Entities;

namespace TsBlog.Repositories
{
    public interface IPostRepository
    {
        /// <summary>
        /// 根據ID查詢單條數據
        /// </summary>
        /// <param name="id">ID</param>
        /// <returns></returns>
        Post FindById(int id);
        /// <summary>
        /// 查詢全部數據(無分頁,大數量時請慎用)
        /// </summary>
        /// <returns></returns>
        IEnumerable<Post> FindAll();

        /// <summary>
        /// 寫入實體數據
        /// </summary>
        /// <param name="entity">博文實體類</param>
        /// <returns></returns>
        int Insert(Post entity);

        /// <summary>
        /// 更新實體數據
        /// </summary>
        /// <param name="entity">博文實體類</param>
        /// <returns></returns>
        bool Update(Post entity);

        /// <summary>
        /// 根據實體刪除一條數據
        /// </summary>
        /// <param name="entity">博文實體類</param>
        /// <returns></returns>
        bool Delete(Post entity);

        /// <summary>
        /// 刪除指定ID的數據
        /// </summary>
        /// <param name="id">主鍵ID</param>
        /// <returns></returns>
        bool DeleteById(object id);

        /// <summary>
        /// 刪除指定ID集合的數據(批量刪除)
        /// </summary>
        /// <param name="ids">主鍵ID集合</param>
        /// <returns></returns>
        bool DeleteByIds(object[] ids);
    }
}

再切換到服務層,在剛纔建立的服務層項目中首先引用倉儲層,並分別建立如下服務接口和類文件:數據庫

IPostService.cs:mvc

using System.Collections.Generic;
using TsBlog.Domain.Entities;

namespace TsBlog.Services
{
    public interface IPostService
    {
        /// <summary>
        /// 根據ID查詢單條數據
        /// </summary>
        /// <param name="id">ID</param>
        /// <returns></returns>
        Post FindById(int id);
        /// <summary>
        /// 查詢全部數據(無分頁,大數量時請慎用)
        /// </summary>
        /// <returns></returns>
        IEnumerable<Post> FindAll();

        /// <summary>
        /// 寫入實體數據
        /// </summary>
        /// <param name="entity">博文實體類</param>
        /// <returns></returns>
        int Insert(Post entity);

        /// <summary>
        /// 更新實體數據
        /// </summary>
        /// <param name="entity">博文實體類</param>
        /// <returns></returns>
        bool Update(Post entity);

        /// <summary>
        /// 根據實體刪除一條數據
        /// </summary>
        /// <param name="entity">博文實體類</param>
        /// <returns></returns>
        bool Delete(Post entity);

        /// <summary>
        /// 刪除指定ID的數據
        /// </summary>
        /// <param name="id">主鍵ID</param>
        /// <returns></returns>
        bool DeleteById(object id);

        /// <summary>
        /// 刪除指定ID集合的數據(批量刪除)
        /// </summary>
        /// <param name="ids">主鍵ID集合</param>
        /// <returns></returns>
        bool DeleteByIds(object[] ids);
    }
}

PostService.csapp

using System.Collections.Generic;
using TsBlog.Domain.Entities;
using TsBlog.Repositories;

namespace TsBlog.Services
{
    public class PostService : IPostService
    {
        private readonly IPostRepository _postRepository;
        public PostService(IPostRepository postRepository)
        {
            _postRepository = postRepository;
        }
        public bool Delete(Post entity)
        {
            return _postRepository.Delete(entity);
        }

        public bool DeleteById(object id)
        {
            return _postRepository.DeleteById(id);
        }

        public bool DeleteByIds(object[] ids)
        {
            return _postRepository.DeleteByIds(ids);
        }

        public IEnumerable<Post> FindAll()
        {
            return _postRepository.FindAll();
        }

        public Post FindById(int id)
        {
            return _postRepository.FindById(id);
        }

        public int Insert(Post entity)
        {
            return _postRepository.Insert(entity);
        }

        public bool Update(Post entity)
        {
            return _postRepository.Update(entity);
        }
    }
}

最後,咱們再切換到倉儲層,在PostRepository文件中使用IPostRepository接口並使用SqlSugar實現該接口中的全部數據操做的方法,
PostRepository.cs框架

using System.Collections.Generic;
using TsBlog.Domain.Entities;

namespace TsBlog.Repositories
{
    /// <summary>
    /// POST表的數據庫操做類
    /// </summary>
    public class PostRepository : IPostRepository
    {
        /// <summary>
        /// 根據ID查詢
        /// </summary>
        /// <param name="id">Post ID</param>
        /// <returns></returns>
        public Post FindById(int id)
        {
            using (var db = DbFactory.GetSqlSugarClient())
            {
                var entity = db.Queryable<Post>().Single(x => x.Id == id);
                return entity;
            }
        }

        /// <summary>
        /// 查詢全部數據(無分頁,大數量時請慎用)
        /// </summary>
        /// <returns></returns>
        public IEnumerable<Post> FindAll()
        {
            #region SqlSugar讀取方式
            using (var db = DbFactory.GetSqlSugarClient())
            {
                var list = db.Queryable<Post>().ToList();
                return list;
            }
            #endregion
        }


        /// <summary>
        /// 寫入實體數據
        /// </summary>
        /// <param name="entity">博文實體類</param>
        /// <returns></returns>
        public int Insert(Post entity)
        {
            using (var db = DbFactory.GetSqlSugarClient())
            {
                var i = db.Insertable(entity).ExecuteReturnBigIdentity();
                //返回的i是long類型,這裏你能夠根據你的業務須要進行處理
                return (int)i;
            }
        }

        /// <summary>
        /// 更新實體數據
        /// </summary>
        /// <param name="entity">博文實體類</param>
        /// <returns></returns>
        public bool Update(Post entity)
        {
            using (var db = DbFactory.GetSqlSugarClient())
            {
                //這種方式會以主鍵爲條件
                var i = db.Updateable(entity).ExecuteCommand();
                return i > 0;
            }
        }

        /// <summary>
        /// 根據實體刪除一條數據
        /// </summary>
        /// <param name="entity">博文實體類</param>
        /// <returns></returns>
        public bool Delete(Post entity)
        {
            using (var db = DbFactory.GetSqlSugarClient())
            {
                var i = db.Deleteable(entity).ExecuteCommand();
                return i > 0;
            }
        }

        /// <summary>
        /// 刪除指定ID的數據
        /// </summary>
        /// <param name="id">主鍵ID</param>
        /// <returns></returns>
        public bool DeleteById(object id)
        {
            using (var db = DbFactory.GetSqlSugarClient())
            {
                var i = db.Deleteable<Post>(id).ExecuteCommand();
                return i > 0;
            }
        }

        /// <summary>
        /// 刪除指定ID集合的數據(批量刪除)
        /// </summary>
        /// <param name="ids">主鍵ID集合</param>
        /// <returns></returns>
        public bool DeleteByIds(object[] ids)
        {
            using (var db = DbFactory.GetSqlSugarClient())
            {
                var i = db.Deleteable<Post>().In(ids).ExecuteCommand();
                return i > 0;
            }
        }
    }
}

到這裏,咱們的倉儲和服務層準備工做就完成了,接下來安裝依賴注入組件:Autofacide

安裝Autofac

選擇解決方案夾[2.Persentation]中的Web項目[TsBlog.Frontend],在"引用"("References")上單擊右鍵,調出Nuget程序包管理界面,搜索"autofac",以下:post

Nuget程序包管理--安裝Autofac

Autofac的當前版本爲:v4.6.2

同時,再搜索"Autofac.Mvc5",以下:

Nuget程序包管理--安裝Autofac.Mvc5

配置/註冊依賴選項

Autofac安裝完成以後,咱們須要對依賴的接口對實如今Autofac中進行註冊,本示例的Autofac配置在Global.asax文件中(請確保TsBlog.Frontend項目中引用了:TsBlog.Domain,TsBlog.Repositories,TsBlog.Servcies這本個項目),以下:

Global.asax

using Autofac;
using Autofac.Integration.Mvc;
using System.Web.Mvc;
using System.Web.Routing;
using TsBlog.Repositories;
using TsBlog.Services;

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

            AutofacRegister();
        }

        private void AutofacRegister()
        {
            var builder = new ContainerBuilder();

            //註冊MvcApplication程序集中全部的控制器
            builder.RegisterControllers(typeof(MvcApplication).Assembly);

            //註冊倉儲層服務
            builder.RegisterType<PostRepository>().As<IPostRepository>();
            //註冊服務層服務
            builder.RegisterType<PostService>().As<IPostService>();

            //註冊過濾器
            builder.RegisterFilterProvider();

            var container = builder.Build();

            //設置依賴注入解析器
            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
        }
    }
}

而後,咱們修改控制器文件夾中的HomeController,修改後的代碼以下:

HomeController.cs

using System.Web.Mvc;
using TsBlog.Services;

namespace TsBlog.Frontend.Controllers
{
    public class HomeController : Controller
    {
        private readonly IPostService _postService;
        public HomeController(IPostService postService)
        {
            _postService = postService;
        }
        public ActionResult Index()
        {
            return View();
        }

        public ActionResult Post()
        {
            //var postRepository = new PostRepository();
            //var post = postRepository.FindById(1);
            //return View(post);

            var post = _postService.FindById(1);
            return View(post);
        }
    }
}

再次按F5運行,打開頁面:http://localhost:54739/home/post,此次咱們能夠看到和前兩篇同樣的運行效果了:

Autofac運行結果

本文的源碼託管地址:https://github.com/lampo1024/...

本文學習到此結束,本系列未完待續......

若是你喜歡Rector的本系列文章,請爲我點個大大的贊,以支持Rector在後續的寫做中更有基(激)情,哈哈。。。

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