Ninject Kernel.Get 和构造函数注入之间的不同行为

我有什么：

public interface IBla
{
}

public class Bla1 : IBla
{
}

public class Bla : IBla
{
}

public class Consumer
{
    private readonly IBla[] _array;

    public Consumer(IBla[] array)
    {
        _array = array;
    }
}

public static class NinjectExtensions
{
      public class BindListExpression<TElement>
      {
          private readonly IKernel _kernel;
          private readonly List<Type> _types = new List<Type>();

          public BindListExpression(IKernel kernel)
          {
              _kernel = kernel;
          }

          public BindListExpression<TElement> ImplementedBy<T>() where T : TElement
          {
              var type = typeof(T);

              _kernel.Bind<T>().To(type);
              _types.Add(type);

              return this;
          }

          public void Bind()
          {
              Func<TElement[]> createObjects = () =>
              {
                  var sourceArray = new TElement[_types.Count];
                  for (var i = 0; i < _types.Count; i++)
                  {
                      var value = _kernel.Get(_types[i]);
                      sourceArray[i] = (TElement)value;
                  }
                  return sourceArray;
              };

              _kernel.Bind<TElement[]>().ToMethod(x => createObjects().ToArray());
              _kernel.Bind<List<TElement>>().ToMethod(x => (createObjects().ToList()));
              _kernel.Bind<IEnumerable<TElement>>().ToMethod(x => createObjects().ToList());
          }
      }
      public static BindListExpression<T> ListOf<T>(this IKernel kernel)
      {
          return new BindListExpression<T>(kernel);
      }
  }

Usage:

// Binds items in the given order as a list (Ninject does not guarantee the given order so I use this mechanism).
kernel.ListOf<IBla>()
    .ImplementedBy<Bla1>()
    .ImplementedBy<Bla>()
    .Bind();

var consumer = kernel.Get<Consumer>(); // result: consumer._array is empty?! --> what is imo wrong
var array = kernel.Get<IBla[]>(); // result: Bla1, Bla --> correct

为什么 Ninject 在两个对象之间不产生相同的结果Get<IBla[]>()和带参数的构造函数IBla[]?

通过构造函数注入，ninject 会翻译 ctor 参数IBla[] to a IResolutionRoot.GetAll<IBla>().ToArray()。这就是对多次注入的支持的实现方式。因此，ctor 请求不可能导致IResolutionRoot.Get<IBla[]>()- 但这仍然是您可以手动完成的事情。

对于 ninject 转换为多重注入的所有集合类型都是如此（AFAIR 数组、IList, IEnumerable， 但不是ICollection).

我建议使用另一个集合接口（例如ICollection) 或集合实现作为构造函数参数。这将导致 ctor 注入和IResolutionRoot.Get calls.