核心2.1依赖注入 [英] net core 2.1 Dependency injection

问题描述

我有一个点网核心项目，我想在我的Controller IContextDb中注入

I have dot net core project , I want to inject in my Controller IContextDb

我有很多继承自IContextDb
的类，例如（ShopContext，UserContext， ..）：IContextDb

I have many class inherit from IContextDb ie (ShopContext, UserContext, ..) : IContextDb

我的问题是：

1-是否可以在其中注入正确的上下文正确的控制器
实时将上下文注入我的控制器中

1 - Is there way to inject the right context in the right Controller to inject the context in my controller in real time

My Startup.cs

public void ConfigureServices(IServiceCollection services)
{
  services.AddTransient<IContextDb>(
    serviceProvider => 
      {
         /// to do to map IContextDb with right context for
         /// right controller 
         /// or using reflection  
       });
    services.AddOptions();
    services.AddMvc();
  }

我的MVC控制器：

public class UserController
{
    private IContextDb _userContext
    public UserController(IContextDb userContext)
    {
       _userContext = userContext;
    }
}

推荐答案

在每个控制器中注入具体类

Just inject the concrete class in each controller

public class UserController
{
    private IContextDb _userContext
    public UserController(UserContext userContext)
    {
       _userContext = userContext;
    }
}

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