依赖注入Unity框架

依赖注入和控制反转是对同一件事情的不同描述，从某个方面讲，就是它们描述的角度不同。依赖注入是从应用程序的角度在描述，可以把依赖注入描述完整点：应用程序依赖容器创建并注入它所需要的外部资源；而控制反转是从容器的角度在描述，描述完整点：容器控制应用程序，由容器反向的向应用程序注入应用程序所需要的外部资源。

第一步：在项目中添加Unity（通过nuget直接获取）

第二步：Unity简单使用步骤

1创建容器

2注册接口映射

3获取实例

    1.1通过代码方式进行注册

  2.2通过配置文件方式进行注册

 附源码：

web.config配置文件

<?xml version="1.0" encoding="utf-8"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=301880
  -->
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    <section name="RedisConfig" type="MyBolg.Redis.RedisConfigInfo, MyBolg" />
    <section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection,Microsoft.Practices.Unity.Configuration"/>
  </configSections>
  <unity xmlns="http://schemas.microsoft.com/practces/2010/unity">
    <containers>
      <!--MyContainer为自定义名称 只需要和调用时名称保持一致即可-->
      <container name="MyContainer">
        <!--type为对象的名称,mapTo为注入对象的名称 写法为用逗号隔开两部分，一是类的全部，包括命名空间，二是程序集名称-->
        <register type="MyBolg.Controllers.Ilog,MyBolg" mapTo="MyBolg.Controllers.FileLog,MyBolg">
          <lifetime type="singleton" />
        </register>
    
      </container>
    </containers>
  </unity>
  <RedisConfig WriteServerList="127.0.0.1:6379" ReadServerList="127.0.0.1:6379" MaxWritePoolSize="60" MaxReadPoolSize="60" AutoStart="true" LocalCacheTime="180" RecordeLog="false">
  </RedisConfig>
  <connectionStrings>
    <add name="DefaultConnection" connectionString="Data Source=(LocalDb)MSSQLLocalDB;AttachDbFilename=|DataDirectory|aspnet-MyBolg-20170628095130.mdf;Initial Catalog=aspnet-MyBolg-20170628095130;Integrated Security=True" providerName="System.Data.SqlClient" />
    <add name="mmsql" connectionString="Data Source=bds278166222.my3w.com;Initial Catalog=bds278166222_db;User ID=bds278166222;pwd=wangjun1234" />
  <add name="MyBolgEntities" connectionString="metadata=res://*/EFModel.Model1.csdl|res://*/EFModel.Model1.ssdl|res://*/EFModel.Model1.msl;provider=System.Data.SqlClient;provider connection string="data source=bds278166222.my3w.com;initial catalog=bds278166222_db;user id=bds278166222;password=wangjun1234;MultipleActiveResultSets=True;App=EntityFramework"" providerName="System.Data.EntityClient" /><add name="BolgModel" connectionString="data source=bds278166222.my3w.com;initial catalog=bds278166222_db;user id=bds278166222;password=wangjun1234;MultipleActiveResultSets=True;App=EntityFramework" providerName="System.Data.SqlClient" /></connectionStrings>
  <appSettings>
    <add key="webpages:Version" value="3.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
  </appSettings>
  <system.web>
    <authentication mode="None" />
    <compilation debug="true" targetFramework="4.5.2" />
    <httpRuntime targetFramework="4.5.2" />
    <httpModules>
      <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" />
    </httpModules>
  </system.web>
  <system.webServer>
    <modules>
      <remove name="FormsAuthentication" />
      <remove name="ApplicationInsightsWebTracking" />
      <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" preCondition="managedHandler" />
    </modules>
    <validation validateIntegratedModeConfiguration="false" />
  </system.webServer>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security.OAuth" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security.Cookies" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" culture="neutral" publicKeyToken="30ad4fe6b2a6aeed" />
        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Optimization" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="1.1.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-1.5.2.14234" newVersion="1.5.2.14234" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
  <system.codedom>
    <compilers>
      <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:6 /nowarn:1659;1699;1701" />
      <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:14 /nowarn:41008 /define:_MYTYPE="Web" /optionInfer+" />
    </compilers>
  </system.codedom>
</configuration>

　　Ioc控制器

using Microsoft.Practices.Unity;
using Microsoft.Practices.Unity.Configuration;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace MyBolg.Controllers
{
    public class IOCController : Controller
    {
        
        // GET: IOC
        public ActionResult Index()
        {
            //Unity简单步骤
            //1.创建容器
            //2.注册接口映射
            //3.获取实例
            #region 通过代码方式进行注册  
            //IUnityContainer parentContainer = new UnityContainer();
            ////父容器可以创建子容器
            //IUnityContainer childerContainer = parentContainer.CreateChildContainer();
            //parentContainer.RegisterType<Ilog, MyBolg.Controllers.FileLog>();
            ////给datalog在容器中起个名字，以后根据名字得到database
            //parentContainer.RegisterType<Ilog, MyBolg.Controllers.DateLog>("database");   
            //Ilog textlog = parentContainer.Resolve<Ilog>();
            //string str = textlog.savaLog("这是文件日志保存的实例");
            //Ilog datalog = parentContainer.Resolve<Ilog>("database");
            //str += datalog.savaLog("---这是数据日志保存的实例");
            //ViewBag.str = str;
            #endregion
            #region 根据配置文件方式进行依赖注入
            IUnityContainer container = new UnityContainer();
            UnityConfigurationSection config = (UnityConfigurationSection)ConfigurationManager.GetSection(UnityConfigurationSection.SectionName);
            config.Configure(container, "MyContainer");
            Ilog log = container.Resolve<DateLog>();
            string str = log.savaLog("这是数据日志保存的内容");
            Ilog logs = container.Resolve<FileLog>();
            str += logs.savaLog("---这是通过文件日志保存的文件");
            ViewBag.str = str;
            #endregion
            return View();
        }
    }

    public interface Ilog {
        string  savaLog(string messgae);
    }

    public class FileLog : Ilog
    {
        public string  savaLog(string messgae)
        {
            return messgae;
        }
    }
    public class DateLog : Ilog
    {
        public string savaLog(string messgae)
        {
            return messgae;
        }
    }
}

　　 view视图

@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    <div> 

        @ViewBag.str
    </div>
</body>
</html>