原文：https://blog.csdn.net/liuweitoo/article/details/8278472

Autofac.2.6.3.862

一、 使用程式碼方式進行元件註冊【依賴服務類和元件類】

/// <summary>
    /// 管理類
    /// </summary>
    public partial class Mgr
    {
        private static IContainer container = null;

        /// <summary>
        /// 自定義容器和元件註冊
        /// </summary>
        /// <returns></returns>
        public static IContainer GetContainer()
        {

            if (container == null)
            {
                var builder = new ContainerBuilder();
                //builder.RegisterType<SqlDatabase>().As<IDatabase>();
                builder.RegisterType<SqlDatabase>().Named<IDatabase>("AutofacDemo.Lib.Sql.SqlDatabase");
                builder.RegisterType<OracleDatabase>().Named<IDatabase>("AutofacDemo.Lib.Oracle.OracleDatabase");

                container = builder.Build();

            }
            return container;
        }
    }
 

二. 使用配置檔案進行元件註冊【不需要依賴】

2.1. 定義配置檔案

<?xml version="1.0"?>
<configuration>
  <configSections>
    <section name="autofac" type="Autofac.Configuration.SectionHandler, Autofac.Configuration"/>
  </configSections>
  <autofac>
    <components>
      <component name="AutofacDemo.Lib.Oracle.OracleDatabase" type="AutofacDemo.Lib.Oracle.OracleDatabase, AutofacDemo.Lib.Oracle" service="AutofacDemo.Lib.IDatabase, AutofacDemo.Lib"/>
      <component name="AutofacDemo.Lib.Sql.SqlDatabase" type="AutofacDemo.Lib.Sql.SqlDatabase, AutofacDemo.Lib.Sql" service="AutofacDemo.Lib.IDatabase, AutofacDemo.Lib"/>
    </components>
  </autofac>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>
 

2.2. 讀取config配置檔案進行元件註冊

        /// <summary>
        /// 根據配置檔案裡的服務名生成物件
        /// </summary>
        public static void GetFrom_Config()
        {


            var builder = new ContainerBuilder();

            //從.config配置檔案中取得相關的元件註冊
            builder.RegisterModule(new ConfigurationSettingsReader("autofac")); 

           

            using (var container = builder.Build())
            {
                string vServiceName = "AutofacDemo.Lib.Oracle.OracleDatabase";//服務名
                //vServiceName = "AutofacDemo.Lib.Sql.SqlDatabase";

                //是否存在服務名
                if (container != null)
                {
                    if (container.IsRegisteredWithName(vServiceName, typeof(IDatabase)))
                    {
                        IDatabase db = container.ResolveNamed<IDatabase>(vServiceName);
                        if (db != null)
                        {
                            db.Select("..........");
                        }
                    }
                }
            }
        }
 

2.3. 是否存在服務名，存在，則根據服務名取得物件

                //是否存在服務名
                if (container.IsRegisteredWithName(vServiceName, typeof(IDatabase)))
                {
                    IDatabase db = container.ResolveNamed<IDatabase>(vServiceName);
                    if (db != null)
                    {
                        db.Select("..........");
                    }
                }

三. Demo下載

點此下載

四. 使用程式碼方式進行元件註冊【不需要依賴】【類似反射的全字串形式】

/// <summary>
        /// 自定義容器和通過反射進行元件註冊
        /// </summary>
        /// <returns></returns>
        public static IContainer GetContainer()
        {

            if (container == null)
            {
                var builder = new ContainerBuilder();


                Type objType = Type.GetType("AutofacDemo.Lib.IDatabase, AutofacDemo.Lib");
                Type objTypeA = Type.GetType("AutofacDemo.Lib.Oracle.OracleDatabase, AutofacDemo.Lib.Oracle");
                Type objTypeB = Type.GetType("AutofacDemo.Lib.Sql.SqlDatabase, AutofacDemo.Lib.Sql");


                builder.RegisterType(objTypeA).Named("AutofacDemo.Lib.Oracle.OracleDatabase", objType);
                builder.RegisterType(objTypeB).Named("AutofacDemo.Lib.Sql.SqlDatabase", objType);


                需要知道介面
                //builder.RegisterType(objTypeA).Named<objType>("AutofacDemo.Lib.Sql.SqlDatabase");
                //builder.RegisterType(objTypeB).Named<objType>("AutofacDemo.Lib.Oracle.OracleDatabase");

                container = builder.Build();

            }
            return container;
        }

download