如何在运行时使用unity DI注册组件 [英] How do I register components at run time with unity DI

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问题描述

我创建了一个Microsoft统一项目(我第一次使用Dependency Injection),并且我的家庭控制器按预期进行了正常工作,并按如下所示注册了我的消息传递类

I created an Microsoft unity project (my first using Dependency Injection) with my home controller working fine as expected having registered my messaging Class as follows

 private static IUnityContainer BuildUnityContainer()
{
  var container = new UnityContainer(); 
  container.RegisterType<IMessageService, MessageService>(new HierarchicalLifetimeManager());
  RegisterTypes(container);

  return container;
}

挑战在于,我打算使这个项目成为多个模块的父级,这些模块将成为插件,我该如何注册数据库连接性和操作方式?如何在不重新编译项目的情况下插入最初未添加的其他模块?

The challenge is I intend making this project a parent to several modules that will be plugins, how do I register my database connectivity and manipulations? How do I plugin other modules not added initially without recompiling the project?

注意:我使用的是Code First.

Note: I'm using Code First.

所有帮助将不胜感激.

推荐答案

首先,您需要注册Unity配置部分.看起来像这样:

First of all you need to register Unity configuration section. That looks like this:

<section name="unity" 
         type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Microsoft.Practices.Unity.Configuration, Version=2.1.505.0, Culture=neutral, PublickKeyToken=31bf3856ad364e35" />

这是Unity 2的配置.接下来是添加统一部分.

This is Unity 2 configuration. Next is to add unity section.

<unity xmlns="http://schemas.microsoft.com/practices/2010/unity">
    <!-- General aliases -->
    <alias alias="string" type="System.String, mscorlib" />
    <alias alias="singleton" type="Microsoft.Practices.Unity.ContainerControlledLifetimeManager, Microsoft.Practices.Unity, Version=2.1.505.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
    <!-- Interface aliases -->
    <alias alias="ISampleService" type="MyApp.Api.Interfaces.Services.ISampleService, MyApp.Api" />
    <alias alias="IMessagingService" type="MyApp.Api.Interfaces.Services.IMessagingService, MyApp.Api" />

    <!-- Concrete implementations aliases -->
    <alias alias="SampleServiceImpl" type="MyApp.BizLayer.SampleService, MyApp.BizLayer" />
    <alias alias="MessagingServiceImpl" type="MyApp.BizLayer.SampleService, MyApp.BizLayer" />

    <container>
       <register type="SampleServiceImpl" mapTo="ISampleService"/>
       <register type="MessagingServiceImpl" mapTo="IMessagingService">
          <lifetime type="singleton" />
       </register>
    </container>
</unity>

在您的代码中,在global.asax中(如果是通过NuGet下载的,则在Unity Bootstrapper.cs中)中将使用以下代码:

In your code, in global.asax (or Unity Bootstrapper.cs if you downloaded it via NuGet) you would use something like this:

public static class UnityBootstrapper
{
    public static void Initialise()
    {
        var container = BuildUnityContainer();

        DependencyResolver.SetResolver(new UnityDependencyResolver(container));

        var resolver = DependencyResolver.Current;
        var newResolver = new Infrastructure.IoC.UnityDependencyResolver(container, resolver);

        DependencyResolver.SetResolver(newResolver);
    }

    private static IUnityContainer BuildUnityContainer()
    {
        var container = new UnityContainer();
        var unityConfigSection = WebConfigurationManager.GetSection("unity") as UnityConfigurationSection;

        if (unityConfigSection != null)
        {
            unityConfigSection.Configure(container);
        }

        return container;
    }
}

仅此而已.

这篇关于如何在运行时使用unity DI注册组件的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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