ActivationException when using ToFactory in Ninject

Question

When I try to use the ToFactory in Ninject, I get Ninject.ActivationException

var test = new StandardKernel();
test.Bind<IFoo>().To<Foo>();
test.Bind<IFooFactory>().ToFactory();
var factory = test.Get<IFooFactory>();
var foo = factory.GetFoo();           //<--Ninject.ActivationException

the factory:

public interface IFooFactory
{
    IFoo GetFoo();
}

The exception:

Ninject.ActivationException was unhandled
  Message=Error activating IFoo
No matching bindings are available, and the type is not self-bindable.
Activation path:
  1) Request for IFoo

Suggestions:
  1) Ensure that you have defined a binding for IFoo.
  2) If the binding was defined in a module, ensure that the module has been loaded into the kernel.
  3) Ensure you have not accidentally created more than one kernel.
  4) If you are using constructor arguments, ensure that the parameter name matches the constructors parameter name.
  5) If you are using automatic module loading, ensure the search path and filters are correct.

  Source=Ninject
  StackTrace:
       at Ninject.KernelBase.Resolve(IRequest request) in c:\Projects\Ninject\ninject\src\Ninject\KernelBase.cs:line 359
       at Ninject.ResolutionExtensions.GetResolutionIterator(IResolutionRoot root, Type service, Func`2 constraint, IEnumerable`1 parameters, Boolean isOptional, Boolean isUnique) in c:\Projects\Ninject\ninject\src\Ninject\Syntax\ResolutionExtensions.cs:line 263
       at Ninject.ResolutionExtensions.Get(IResolutionRoot root, Type service, String name, IParameter[] parameters) in c:\Projects\Ninject\ninject\src\Ninject\Syntax\ResolutionExtensions.cs:line 164
       at Ninject.Extensions.Factory.Factory.InstanceResolver.Get(Type type, String name, Func`2 constraint, ConstructorArgument[] constructorArguments, Boolean fallback) in c:\Projects\Ninject\ninject.extensions.factory\src\Ninject.Extensions.Factory\Factory\InstanceResolver.cs:line 75
       at Ninject.Extensions.Factory.StandardInstanceProvider.GetInstance(IInstanceResolver instanceResolver, MethodInfo methodInfo, Object[] arguments) in c:\Projects\Ninject\ninject.extensions.factory\src\Ninject.Extensions.Factory\Factory\StandardInstanceProvider.cs:line 78
       at Ninject.Extensions.Factory.FactoryInterceptor.Intercept(IInvocation invocation) in c:\Projects\Ninject\ninject.extensions.factory\src\Ninject.Extensions.Factory\Factory\FactoryInterceptor.cs:line 57
       at Castle.DynamicProxy.AbstractInvocation.Proceed()
       at Castle.Proxies.IFooFactoryProxy.GetFoo()

Answer 1

您的方法命名触发了一个约定，使得生成的结果工厂正在请求名为“ Foo”的IFoo但是配置尚未使用该名称注册该类型的服务。