Unity（四）IocContainer 封装类库

首先要在项目中安装Unity，通过NuGet搜索Unity。

1.定义接口 IDependencyResolver

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace IOCContainer
{public interface IDependencyResolver : IDisposable{/// <summary>/// 注册 T类型实例/// </summary>/// <typeparam name="T"></typeparam>/// <param name="instance"></param>void Register<T>(T instance);/// <summary>/// 注入 /// </summary>/// <typeparam name="T"></typeparam>/// <param name="existing"></param>void Inject<T>(T existing);/// <summary>/// 解析/// </summary>/// <typeparam name="T"></typeparam>/// <param name="type"></param>/// <returns></returns>T Resolve<T>(Type type);T Resolve<T>(Type type, string name);T Resolve<T>();T Resolve<T>(string name);IEnumerable<T> ResolveAll<T>();}
}

2.具体实现接口 UnityDependencyResolver

using Microsoft.Practices.Unity;
using Microsoft.Practices.Unity.Configuration;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Configuration;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace IOCContainer
{[Serializable]public class UnityDependencyResolver : IDisposable, IDependencyResolver{//注入容器private IUnityContainer _container;public UnityDependencyResolver() : this(new UnityContainer()){UnityConfigurationSection configuration = (UnityConfigurationSection)ConfigurationManager.GetSection("unity");_container.LoadConfiguration(configuration, "UnityContainer");}public UnityDependencyResolver(IUnityContainer container){_container = container;}public void Register<T>(T instance){//注册实例_container.RegisterInstance(instance);}public void Inject<T>(T existing){//注入加载_container.BuildUp(existing);}public T Resolve<T>(Type type){//解析return (T)_container.Resolve(type);}public T Resolve<T>(Type type, string name){return (T)_container.Resolve(type, name);}public T Resolve<T>(){return _container.Resolve<T>();}public T Resolve<T>(string name){return _container.Resolve<T>(name);}public IEnumerable<T> ResolveAll<T>(){//解析容器中所有IEnumerable<T> namedInstances = _container.ResolveAll<T>();T unnamedInstance = default(T);try{unnamedInstance = _container.Resolve<T>();}catch (ResolutionFailedException){//When default instance is missing}if (Equals(unnamedInstance, default(T))){return namedInstances;}return new ReadOnlyCollection<T>(new List<T>(namedInstances) { unnamedInstance });}public void Dispose(){if (_container != null){_container.Dispose();}}}
}

3.定义工厂接口 IDependencyResolverFactory

using IOCContainer;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace IOCContainer
{public interface IDependencyResolverFactory{/// <summary>/// 创建IDependencyResolver的实例/// </summary>/// <returns></returns>IDependencyResolver CreateInstance();}
}

4.具体实现工厂接口 DependencyResolverFactory

using IOCContainer;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;namespace IOCContainer
{public class DependencyResolverFactory : IDependencyResolverFactory{private Type _resolverType;public DependencyResolverFactory(string resolverTypeName){_resolverType = Type.GetType(resolverTypeName, true, true);}public DependencyResolverFactory(){_resolverType = Type.GetType(ConfigurationManager.AppSettings["DependencyResolverTypeName"], true, true);}public IDependencyResolver CreateInstance(){//根据类型创建实例对象return Activator.CreateInstance(_resolverType) as IDependencyResolver;}}
}

5.调用工厂封装 IoC

using IOCContainer;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace IOCContainer
{public static class IoC{//解析器private static IDependencyResolver _resolver;/// <summary>/// 初始化，创建实例对象/// </summary>/// <param name="factory"></param>[DebuggerStepThrough]public static void InitializeWith(IDependencyResolverFactory factory){_resolver = factory.CreateInstance();}/// <summary>/// 注册对象/// </summary>/// <typeparam name="T"></typeparam>/// <param name="instance"></param>[DebuggerStepThrough]public static void Register<T>(T instance){_resolver.Register(instance);}/// <summary>/// 注入对象/// </summary>/// <typeparam name="T"></typeparam>/// <param name="existing"></param>[DebuggerStepThrough]public static void Inject<T>(T existing){_resolver.Inject(existing);}/// <summary>/// 解析对象/// </summary>/// <typeparam name="T"></typeparam>/// <param name="type"></param>/// <returns></returns>[DebuggerStepThrough]public static T Resolve<T>(Type type){return _resolver.Resolve<T>(type);}/// <summary>/// 解析对象/// </summary>/// <typeparam name="T"></typeparam>/// <param name="type"></param>/// <param name="name"></param>/// <returns></returns>[DebuggerStepThrough]public static T Resolve<T>(Type type, string name){return _resolver.Resolve<T>(type, name);}/// <summary>/// 解析对象/// </summary>/// <typeparam name="T"></typeparam>/// <returns></returns>[DebuggerStepThrough]public static T Resolve<T>(){return _resolver.Resolve<T>();}/// <summary>/// 解析对象/// </summary>/// <typeparam name="T"></typeparam>/// <param name="name"></param>/// <returns></returns>[DebuggerStepThrough]public static T Resolve<T>(string name){return _resolver.Resolve<T>(name);}/// <summary>/// 解析对象/// </summary>/// <typeparam name="T"></typeparam>/// <returns></returns>[DebuggerStepThrough]public static IEnumerable<T> ResolveAll<T>(){return _resolver.ResolveAll<T>();}/// <summary>/// 销毁/// </summary>[DebuggerStepThrough]public static void Reset(){if (_resolver != null){_resolver.Dispose();}}}
}

6.配置文件

<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" /><!--声明容器--><section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection,Microsoft.Practices.Unity.Configuration"/></configSections><unity><!--定义类型别名--><aliases><add alias="IProduct" type="UnityTest.IProduct,UnityTest" /><add alias="Milk" type="UnityTest.Milk,UnityTest" /><add alias="Sugar" type="UnityTest.Sugar,UnityTest" /></aliases><!--容器--><container name="UnityContainer"><!--映射关系--><register type="IProduct"  mapTo="Milk"  name="Milk"></register><register type="IProduct"  mapTo="Sugar" name="Sugar"></register></container></unity><connectionStrings><add name="DefaultConnection" connectionString="Data Source=(LocalDb)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\aspnet-UnityTest-20160816022913.mdf;Initial Catalog=aspnet-UnityTest-20160816022913;Integrated Security=True" 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" /><!--Unity IOC容器--><add key="DependencyResolverTypeName" value="IOCContainer.UnityDependencyResolver,IOCContainer"/></appSettings><!--省略了其他配置...-->
</configuration>

7.具体实体类

/// <summary>/// 商品/// </summary>public interface IProduct{string ClassName { get; set; }string ShowInfo();}/// <summary>/// 牛奶/// </summary>public class Milk : IProduct{public string ClassName { get; set; }public string ShowInfo(){return "牛奶";}}/// <summary>/// 糖/// </summary>public class Sugar : IProduct{public string ClassName { get; set; }public string ShowInfo(){return "糖";}}

8.使用Ioc得到对象

　　　　　　　//初始化 指定注册器IoC.InitializeWith(new DependencyResolverFactory("IOCContainer.UnityDependencyResolver"));//初始化 使用默认注册器，配置文件中配置，IOCContainer.UnityDependencyResolver 的无参构造函数//IoC.InitializeWith(new DependencyResolverFactory());//得到实例IProduct sugar = IoC.Resolve<IProduct>("Sugar");string result = sugar.ShowInfo();Response.Write(result);

　　来源：http://www.cnblogs.com/qqlin/archive/2012/10/18/2720830.html

转载于:https://www.cnblogs.com/xsj1989/p/5845927.html

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