如何在控制器中获取数据库上下文 [英] How to get the database context in a controller

问题描述

我整天都在努力弄清楚如何在默认MVC 6项目的ManageController.cs中获得ApplicationDbContext.

I am trying all day to figure out to get the ApplicationDbContext in the ManageController.cs of a default MVC 6 project.

我上网搜索了很多东西，但似乎没有人遇到与我同样的问题.这可能很简单，但我无法弄清楚. 有人有主意吗?

I went online and Googled a lot but no one seems to have the same problem as I have with it. It is probably simple but I can't figure it out. Anyone has an idea?

这是我尝试过的:

IServiceProvider service = new IServiceProvider();
var _context = service.GetService<ApplicationDbContext>();

推荐答案

使用构造函数注入:

public class ManageController
{
    private readonly ApplicationDbContext _context;

    public ManageController(ApplicationDbContext context)
    {
        _context = context;
    }
}

然后，您可以在控制器方法中使用_context对象.文档的依赖注入部分中有更多信息.

Then you can use the _context object in your controller methods. There's more info in the Dependency Injection section of the docs.

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