Unity IOC Framework usage examples

1.IOC Introduction

IOC (inversion of control), inversion of controls

DI (Dependency injection), Dependency injection

The basic concept of the IOC is that it does not create objects, but describes how they are created. The code does not directly connect to objects and services, but describes in the configuration file which component requires which service. The container is responsible for linking these together.

2.Unity Introduction

3. Create a singleton mode container class

Using microsoft.practices.unity;using microsoft.practices.unity.configuration;using System;using System.collections.generic;using system.configuration;using system.linq;using System.Text;using System.threading.tasks;namespace unityioctest{///<summary>//Unity IOC Singleton mode///</summary> Pub        Lic class Unitysingleton {//singleton private static Unitysingleton instance;        IOC container public Iunitycontainer container;  Get singleton public static Unitysingleton getinstance () {if (instance = = NULL | | instance.container = =                NULL) {String configfile = "Unity.config";                var filemap = new Execonfigurationfilemap {execonfigfilename = configfile}; Reading configuration information from config file configurations = configurationmanager.openmappedexeconfiguration (Filemap, C                Onfigurationuserlevel.none); Gets the configuration section for the specified name unityconfigurationsection sections = (Unityconfigurationsection) configuration.                GetSection ("Unity"); Instance = new Unitysingleton () {//container = new UnityContainer (). Loadconfiguration ((unityconfigurationsection) configurationmanager.getsection ("Unity"), "MyContainer") c Ontainer = new UnityContainer ().                Loadconfiguration (section, "MyContainer")//container = new UnityContainer ()};            Instance.container.registertype<iexampleclass, exampleclass> ();        } return instance; //IOC inject entity public static T getinstancedal<t> () {return getinstance (). Container.        Resolve<t> (); }    }}

Here is a single file for unity config configuration, which is easy to manage.

4. Adding IOC related classes

Interface class

public interface iexampleclass{    void Dohelloword ();}

Concrete Implementation Class

    public class Exampleclass:iexampleclass    {public        void Dohelloword ()        {            Console.WriteLine ("Hello Word !");        }    }

Implementing Class Extensions

    public class Diexampleclass    {        //attribute injection        [Dependency] public        iexampleclass example {get; set;}                Private Iexampleclass Testinject;        public void DoWork ()        {            example. Dohelloword ();            Testinject.dohelloword ();        }        Method injection        [Injectionmethod] public        void Initialize (Iexampleclass instance)        {            Testinject = instance ;        }    }

5. Add a configuration file Unity.config

<?xml version= "1.0" encoding= "Utf-8"?><configuration>  <configSections>    <section Name = "Unity" type= "Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Microsoft.Practices.Unity.Configuration "/>  </configSections>  <unity>    <!-- Define type aliases-    <aliases>      <add alias= "Iexampleclass" type= "unityioctest.iexampleclass,unityioctest "/>      <add alias=" ExampleClass "type=" Unityioctest.exampleclass,unityioctest "/>    </aliases>    <!--Containers--    <container name= "MyContainer" >      <!--mapping relationships--      <!--<register Type= "Iexampleclass"  mapto= "ExampleClass" ></register>-->      <register type= " Unityioctest.iexampleclass,unityioctest "  mapto=" Unityioctest.exampleclass,unityioctest "></register >    </container>  </unity></configuration>

6. Function calls

    Class program    {        static void Main (string[] args)        {            //var dao = unitysingleton.getinstancedal< Iexampleclass> ();            var dao = unitysingleton.getinstancedal<diexampleclass> ();            Dao. DoWork ();            Console.ReadLine ();        }    }

7. The results show

Hello word!

Hello word!

Unity IOC Framework usage examples