在与Ninject绑定时使用通用类型 - 是否可能？

Question

Using Ninject, in my main program I call:

var kernel = new StandardKernel(new MyBindings());
var stuff = kernel.Get<MediaPresenter>();

Unfortunately I get an exception:

No matching bindings are available, and the type is not self-bindable.

I really don't understand what that means. Here is my binding class:

class MyBindings : NinjectModule
{
    public override void Load()
    {
        Bind<MediaPresenter>().ToSelf();
        Bind(typeof (Dao<Book>)).To(typeof (Dao<Book>));
    }
}

If I remove the line:

Bind(typeof(Dao<Book>)).To(typeof(Dao<Book>));

The application runs, but then I get no bindings.

Why does that kind of thing not work and how can I fix it?

Answer 1

Can't test it right now but this should work:

Bind(typeof (Dao<>)).To(typeof(Dao<>));

Using an interface, a probably better idea going forward:

Bind(typeof (IDao<>)).To(typeof(Dao<>));

Answer 2

为什么不在加载中执行此操作：

Bind<Dao<Book>>.ToSelf();

Answer 3

You should be codding against interface as it will make your code alot more testable. Have a look at this more info on Ninject binding

Ninject Binding

ok in your case you need to do this (not tested). As long as you tell Inject the concrete implmentations it will take care of the injection at the right places for you depending that you have the right inject attributes in place in your code.

  class MyBindings : NinjectModule
        {
            public override void Load()
            {
                Bind<IMediaPresenter>().To<MediaPresenter>;
                Bind<IDao>().To<Dao>();
                Bind<IBook>().To<Book>();
            }
        }