c# - Ninject 如何在一次调用中解决依赖关系

Question

我是 Ninject 的新手，经过一些研究，我想出了一个例子:

public interface IWeapon
{
    void Hit(Target target);
}

public class Sword : IWeapon
{
    public void Hit(Target target)
    {
        //do something here
    }
}

public class Character
{
    private IWeapon weapon;

    public Character(IWeapon weapon)
    {
        this.weapon = weapon;
    }

    public void Attack(Target target)
    {
        this.weapon.Hit(target);
    }
}

public class Bindings : NinjectModule
{
    public overrides void Load()
    {
        Bind<IWeapon>().To<Sword>();
    }
}

public void Main()
{
    Target sometarget = new Target();
    Kernel kernel = new StandardKernel(new Bindings());
    var weapon = kernel.Get<IWeapon>();
    var character = new Character(weapon);
    character.Attack(sometarget);
}

如您所见，为了解决依赖性，我必须使用 Kernel 拉取 IWeapon 实例并将其传递给 Character的构造函数。我觉得这有点难看，我想知道有没有一种方法可以直接拉取 Character 实例，并且 Ninject 会自动解决与 IWeapon 的依赖关系？像这样的东西:

Character character = kernel.Resolve<Character>();

Answer 1

默认情况下，Ninject 将允许您使用正确的绑定(bind)自动解析具体类型。在您的实例中，您可以这样做:

public void Main()
{
    Target sometarget = new Target();
    IKernel kernel = new StandardKernel(new Bindings());
    //var weapon = kernel.Get<IWeapon>();
    var character = kernel.Get<Character>();
    character.Attack(sometarget);
}

有关更多信息，请阅读 Ninject wiki:https://github.com/ninject/ninject/wiki/Dependency-Injection-With-Ninject