前言
上一篇《一步一步创建ASP.NET MVC5程序[Repository+Autofac+Automapper+SqlSugar](三)》,我们完成了:
* 引用SqlSugar
* 使用SqlSugar对Repository类的改造
并成功使用PostRepository来查询到了数据,今天我们来创建一个新的服务层以及安装配置依赖注入框架组件Autofac等。
本篇知识要点
* 创建服务层:TsBlog.Services
* 创建服务接口
* 实现服务接口
* 创建仓储接口
* 安装Autofac依赖注入组件
* 注册配置Autofac 依赖注入
教程内容
创建服务层
选中解决方案中的解决方案文件夹[1.Libraries],右键单击=>>添加=>>新项目,在弹出的对话框中添加一个.NET Framework 4.6.2的C#类库项目,命名为:TsBlog.Services。项目创建成功后,删除自动生成的Class1.cs文件。
由于服务层需要依赖于仓储层,所以首先切换到仓储层[TsBlog.Repositories]项目中,创建博文的仓储接口类:IPostRepository,代码如下:
using System.Collections.Generic;
using TsBlog.Domain.Entities;
namespace TsBlog.Repositories
{
public interface IPostRepository
{
/// <summary>
/// 根据ID查询单条数据
/// </summary>
/// <param name="id">ID</param>
/// <returns></returns>
Post FindById(int id);
/// <summary>
/// 查询所有数据(无分页,大数量时请慎用)
/// </summary>
/// <returns></returns>
IEnumerable<Post> FindAll();
/// <summary>
/// 写入实体数据
/// </summary>
/// <param name="entity">博文实体类</param>
/// <returns></returns>
int Insert(Post entity);
/// <summary>
/// 更新实体数据
/// </summary>
/// <param name="entity">博文实体类</param>
/// <returns></returns>
bool Update(Post entity);
/// <summary>
/// 根据实体删除一条数据
/// </summary>
/// <param name="entity">博文实体类</param>
/// <returns></returns>
bool Delete(Post entity);
/// <summary>
/// 删除指定ID的数据
/// </summary>
/// <param name="id">主键ID</param>
/// <returns></returns>
bool DeleteById(object id);
/// <summary>
/// 删除指定ID集合的数据(批量删除)
/// </summary>
/// <param name="ids">主键ID集合</param>
/// <returns></returns>
bool DeleteByIds(object[] ids);
}
}
再切换到服务层,在刚才创建的服务层项目中首先引用仓储层,并分别创建以下服务接口和类文件:
IPostService.cs:
using System.Collections.Generic;
using TsBlog.Domain.Entities;
namespace TsBlog.Services
{
public interface IPostService
{
/// <summary>
/// 根据ID查询单条数据
/// </summary>
/// <param name="id">ID</param>
/// <returns></returns>
Post FindById(int id);
/// <summary>
/// 查询所有数据(无分页,大数量时请慎用)
/// </summary>
/// <returns></returns>
IEnumerable<Post> FindAll();
/// <summary>
/// 写入实体数据
/// </summary>
/// <param name="entity">博文实体类</param>
/// <returns></returns>
int Insert(Post entity);
/// <summary>
/// 更新实体数据
/// </summary>
/// <param name="entity">博文实体类</param>
/// <returns></returns>
bool Update(Post entity);
/// <summary>
/// 根据实体删除一条数据
/// </summary>
/// <param name="entity">博文实体类</param>
/// <returns></returns>
bool Delete(Post entity);
/// <summary>
/// 删除指定ID的数据
/// </summary>
/// <param name="id">主键ID</param>
/// <returns></returns>
bool DeleteById(object id);
/// <summary>
/// 删除指定ID集合的数据(批量删除)
/// </summary>
/// <param name="ids">主键ID集合</param>
/// <returns></returns>
bool DeleteByIds(object[] ids);
}
}
PostService.cs
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);
}
}
}
最后,我们再切换到仓储层,在PostRepository文件中使用IPostRepository接口并使用SqlSugar实现该接口中的所有数据操作的方法,
PostRepository.cs
using System.Collections.Generic;
using TsBlog.Domain.Entities;
namespace TsBlog.Repositories
{
/// <summary>
/// POST表的数据库操作类
/// </summary>
public class PostRepository : IPostRepository
{
/// <summary>
/// 根据ID查询
/// </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>
/// 查询所有数据(无分页,大数量时请慎用)
/// </summary>
/// <returns></returns>
public IEnumerable<Post> FindAll()
{
#region SqlSugar读取方式
using (var db = DbFactory.GetSqlSugarClient())
{
var list = db.Queryable<Post>().ToList();
return list;
}
#endregion
}
/// <summary>
/// 写入实体数据
/// </summary>
/// <param name="entity">博文实体类</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类型,这里你可以根据你的业务需要进行处理
return (int)i;
}
}
/// <summary>
/// 更新实体数据
/// </summary>
/// <param name="entity">博文实体类</param>
/// <returns></returns>
public bool Update(Post entity)
{
using (var db = DbFactory.GetSqlSugarClient())
{
//这种方式会以主键为条件
var i = db.Updateable(entity).ExecuteCommand();
return i > 0;
}
}
/// <summary>
/// 根据实体删除一条数据
/// </summary>
/// <param name="entity">博文实体类</param>
/// <returns></returns>
public bool Delete(Post entity)
{
using (var db = DbFactory.GetSqlSugarClient())
{
var i = db.Deleteable(entity).ExecuteCommand();
return i > 0;
}
}
/// <summary>
/// 删除指定ID的数据
/// </summary>
/// <param name="id">主键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>
/// 删除指定ID集合的数据(批量删除)
/// </summary>
/// <param name="ids">主键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;
}
}
}
}
到这里,我们的仓储和服务层准备工作就完成了,接下来安装依赖注入组件:Autofac
安装Autofac
选择解决方案夹[2.Persentation]中的Web项目[TsBlog.Frontend],在"引用"("References")上单击右键,调出Nuget程序包管理界面,搜索"autofac",如下:
Autofac的当前版本为:v4.6.2
同时,再搜索"Autofac.Mvc5",如下:
配置/注册依赖选项
Autofac安装完成之后,我们需要对依赖的接口对实现在Autofac中进行注册,本示例的Autofac配置在Global.asax文件中(请确保TsBlog.Frontend项目中引用了:TsBlog.Domain,TsBlog.Repositories,TsBlog.Servcies这本个项目),如下:
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();
//注册MvcApplication程序集中所有的控制器
builder.RegisterControllers(typeof(MvcApplication).Assembly);
//注册仓储层服务
builder.RegisterType<PostRepository>().As<IPostRepository>();
//注册服务层服务
builder.RegisterType<PostService>().As<IPostService>();
//注册过滤器
builder.RegisterFilterProvider();
var container = builder.Build();
//设置依赖注入解析器
DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
}
}
}
然后,我们修改控制器文件夹中的HomeController,修改后的代码如下:
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运行,打开页面:http://localhost:54739/home/post,这次我们可以看到和前两篇一样的运行效果了:
本文的源码托管地址:https://github.com/lampo1024/TsBlog/releases/tag/v1.4
本文学习到此结束,本系列未完待续......
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