c# - 以非通用方式绑定(bind) Ninject Factory Extension 后出现异常

Question

我有以下代码:

public interface ILogging
{ ... }

public interface ILoggingFactory
{
  ILogging CreateLogging();
}

public class MailSender : IMailSender
{
  [Inject]
  public MailSender(ILoggingFactory loggingFactory)
  {
    ...
  }
}

当我尝试将我的工厂绑定(bind)为

Bind<ILoggingFactory>().ToFactory();

一切正常。否则，当我以非通用方式尝试时

Bind(myType).ToFactory();

我得到一个 InvalidCastException

Unable to cast object of type 'Castle.Proxies.ObjectProxy' to type 'MyLibrary.ILoggingFactory'

当尝试加载使用 logginFactory 的邮件发件人时:

kernel.Get<IMailSender>();

更新:

我使用反射的解决方法:

MethodInfo bindMethodInfo = GetType().GetMethods()
  .First(one => one.Name == "Bind" &&
  one.IsGenericMethod).MakeGenericMethod(mType);
var bindMethodResult = bindMethodInfo.Invoke(this, null);

MethodInfo toFactoryMethodInfo = typeof(Ninject.Extensions.Factory.BindToExtensions).GetMethods()
  .First(one => one.Name == "ToFactory" && one.IsPublic && one.IsGenericMethod &&   
  one.GetParameters().Count() == 1)
  .MakeGenericMethod(mType);

toFactoryMethodInfo.Invoke(bindMethodResult, new[] { bindMethodResult });      

评论:由于项目原因，我想以非通用方式绑定(bind)工厂。

Answer 1

如果你使用

Bind(myType).ToFactory();

Ninject 为工厂类型 Object 而不是 ILoggingFactory 创建了一个代理对象。您必须另外指定工厂类型:

this.kernel.Bind(typeof(ILoggingFactory)).ToFactory(typeof(ILoggingFactory));