記一次autofac+dapper+mvc的框架搭建實踐

1，環境

.net framework4.7.2,Autofac,Autofac.Mvc5,sql server

2,動機

公司項目用的是ef，之前留下代碼的大哥，到處using，代碼沒有分層，連復用都麽的，真的是夠了。現在要重構原來的系統，本著高效、簡潔、高耦合性的原則採用autofac + dapper的設計（其實我更像用core來做，core速度更快，配置更簡單，而且我不想一直用老技術，但是公司大哥不讓啊。。。）

3，代碼

先引用如下幾個包 autofac、autofac.mvc5、autofac.WebApi2

項目結構是這樣，比較簡單

autofac 配置代碼

using Autofac;
using Autofac.Integration.Mvc;
using Autofac.Integration.WebApi;
using AutoFac.Dapper.DataBase;
using System.Linq;
using System.Reflection;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;

namespace AutoFac.Dapper.Test
{
    public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            WebApiConfig.Register(GlobalConfiguration.Configuration);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);

            var builder = new ContainerBuilder();

            //註冊controller
            builder.RegisterControllers(Assembly.GetExecutingAssembly());
            builder.RegisterApiControllers(Assembly.GetExecutingAssembly());


            //載入要註入的程式集
            var iServices = Assembly.Load("AutoFac.Dapper.IService");
            var services = Assembly.Load("AutoFac.Dapper.Service");

            //根據名稱約定（服務層的介面和實現均以Service結尾），實現服務介面和服務實現的依賴
            builder.RegisterAssemblyTypes(iServices, services)
              .Where(t => t.Name.EndsWith("Service"))
              .AsImplementedInterfaces().InstancePerRequest();

            //註冊主從庫的連接對象，每次請求只有一個庫的hashcode都是一個 這裡分了倆個是為了讀寫分離設計的
            builder.RegisterType<DbMasterSession>().InstancePerRequest();
            builder.RegisterType<DbSlaverSession>().InstancePerRequest();


            //創建一個Autofac的容器
            var container = builder.Build();
            //將MVC的控制器對象實例 交由autofac來創建
            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
            GlobalConfiguration.Configuration.DependencyResolver = new AutofacWebApiDependencyResolver(container);
        }
    }
}

 dapper對象的代碼

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AutoFac.Dapper.DataBase
{
    /// <summary>
    /// 公共的資料庫連接管理類，用於使用Autofac時可以自動關閉DbConnection
    /// </summary>
    public sealed class DbMasterSession : IDisposable
    {
        bool _disposed;
        /// <summary>
        /// 用於管理資料庫連接
        /// </summary>
        public IDbConnection DbConnection { get; set; }
        public DbMasterSession()
        {
            DbConnection = new SqlConnection(ConfigurationManager.ConnectionStrings["MasterConStr"].ConnectionString);
        }
        /// <summary>
        /// 關閉DbConnection
        /// </summary>
        public void Dispose()
        {
            if (this._disposed)
                return;

            this._disposed = true;

            if (this.DbConnection == null)
                return;

            if (this.DbConnection.State != ConnectionState.Closed)
                this.DbConnection.Close();
        }
    }
}

 項目地址： https://gitee.com/siming.liu/AutoFac.Dapper.Web