entity-framework - 在 ASP.NET MVC5 中使用 Ninject 注入(inject) Entity Framework DbContext

Question

我刚刚进入依赖注入(inject)世界。

我有以下自定义 DbContext-

public partial class SkyTrackerContext: DbContext
{
    public SkyTrackerContext(): base()
    {
        Database.SetInitializer(new SkyTrackerDBInitializer());
    }
}

想在此基本 Controller 中注入(inject) SkyTrackerContext-

public abstract class BaseController : Controller
{
    public BaseController() {}

    [Inject]
    public SkyTrackerContext MyDbContext { get; set; }
 }

使用示例 -

public class LoginController : BaseController
{            
    public ActionResult ValidateLogin(Login login) 
    {
      var query = MyDbContext.Persons.Where(.....);
    }
}

我应该在 NinjectWebCommon.cs 中编写什么来注入(inject)此上下文？

private static IKernel CreateKernel()
{
    var kernel = new StandardKernel();
    try
    {
        kernel.Bind<Func<IKernel>>().ToMethod(ctx => () => new Bootstrapper().Kernel);
        kernel.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>();

        RegisterServices(kernel);
        return kernel;
     }
     catch
     {
         kernel.Dispose();
         throw;
     }
}

Answer 1

首先，您应该避免方法注入(inject)。相反，使用构造函数注入(inject)。换句话说:

public abstract class BaseController : Controller
{
    protected readonly DbContext context;

    public BaseController(DbContext context)
    {
        this.context = context;
    }

    ...
}

然后，就 Ninject 配置而言，它非常简单:

kernel.Bind<DbContext>().To<SkyTrackerContext>().InRequestScope();