Unity4.0的使用

最近公司用到了Unity，自己就研究了一下。

新建一个ASP.NET MVC基本项目，在NuGet上引入Unity4.0.1最新版。

因为我使用的项目为ASP.NET MVC，所以又添加一个Unity bootstrapper for ASP.NET MVC。

NuGet会帮你在App_Start文件夹下自动添加两个文件UnityConfig.cs和UnityMvcActivator.cs。

 

文件UnityConfig.cs是配置Unity依赖注入用的，可以分为两种

这两种方式的不同点在于，修改依赖注入时，如果是方式一可以在系统运行时修改（支持热插拔）。

文件UnityWebActivator.cs是我们创建的依赖关系注册到MVC中。

我们需要做的是在Global.asax文件中将Unity运行。

 

下面来详细讲述一下这两方式的配置：

方式一使用web.config配置：

1.在UnityConfig.cs下将注释取消container.LoadConfiguration()

        /// <summary>Registers the type mappings with the Unity container.</summary>
        /// <param name="container">The unity container to configure.</param>
        /// <remarks>There is no need to register concrete types such as controllers or API controllers (unless you want to 
        /// change the defaults), as Unity allows resolving a concrete type even if it was not previously registered.</remarks>
        public static void RegisterTypes(IUnityContainer container)
        {
            // NOTE: To load from web.config uncomment the line below. Make sure to add a Microsoft.Practices.Unity.Configuration to the using statements.
            container.LoadConfiguration();

            // TODO: Register your types here
            // container.RegisterType<IProductRepository, ProductRepository>();
        }

2.在configSections节点下添加以下内容

  <configSections>
    <section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection,Microsoft.Practices.Unity.Configuration"/>
  </configSections>

3.配置unity节点信息

  <unity  xmlns="http://schemas.microsoft.com/practices/2010/unity">
    <assembly  name="IBLL"/>
    <assembly  name="BLL"/>
    <containers>
      <container>
        <register  type="IBLL.ITest,IBLL" mapTo="BLL.Test,BLL" />
      </container>
    </containers>
  </unity>

 配置完成运行就ok了。

这是我遇到一个问题，找了很多资料才解决的

原来web.config是这样配置的

  <unity  xmlns="http://schemas.microsoft.com/practices/2010/unity">
    <containers>
      <container>
        <register  type="IBLL.ITest" mapTo="BLL.Test" />
      </container>
    </containers>
  </unity>

这种情况下会报这种错误

The type name or alias IBLL.ITest could not be resolved. Please check your configuration file and verify this type name.

 

这里找到了答案http://stackoverflow.com/questions/14935645/type-name-could-not-be-resolved-please-check-config-file

 

方式二使用代码配置：

这种方式十分的简单基本上我们只要参考作者给的提示就ok

在UnityConfig.cs下配置如下代码：

        /// <summary>Registers the type mappings with the Unity container.</summary>
        /// <param name="container">The unity container to configure.</param>
        /// <remarks>There is no need to register concrete types such as controllers or API controllers (unless you want to 
        /// change the defaults), as Unity allows resolving a concrete type even if it was not previously registered.</remarks>
        public static void RegisterTypes(IUnityContainer container)
        {
            // NOTE: To load from web.config uncomment the line below. Make sure to add a Microsoft.Practices.Unity.Configuration to the using statements.
            //container.LoadConfiguration();

            // TODO: Register your types here
            // container.RegisterType<IProductRepository, ProductRepository>();
            container.RegisterType<IBLL.ITest,BLL.Test>();
        }

以上是个人使用经验分享给大家，上面的内容比较浅显，如果有错误请大家指正