使用Ninject DI为API和＆QUOT;定期＆QUOT;在MVC4控制器 [英] Using Ninject DI for both api and "regular" controllers in MVC4

问题描述

  

可能重复：结果
   MVC3 + Ninject - 如何

在一个小的MVC 4项目，我试图用ninject实现依赖注入。

到目前为止，我有它的API控制器上工作，但我不与常规控制器运气好的话。

我有一个NinjectResolver：

 公共类NinjectDependencyResolver：NinjectDependencyScope，的IDependencyResolver
    {
        私人只读的iKernel _KERNEL;        公共NinjectDependencyResolver（内核的iKernel）
            ：基地（内核）
        {
            _KERNEL =内核;
        }        公共IDependencyScope BeginScope（）
        {
            返回新NinjectDependencyScope（_kernel.BeginBlock（））;
        }        公共覆盖无效的Dispose（）
        {
            _kernel.Dispose（）;
        }
    }
 

和一个NinjectScope：

 公共类NinjectDependencyScope：IDependencyScope
    {
        保护IResolutionRoot ResolutionRoot;        公共NinjectDependencyScope（IResolutionRoot内核）
        {
            ResolutionRoot =内核;
        }        公共对象GetService的（类型的serviceType）
        {
            VAR请求= ResolutionRoot.CreateRequest（的serviceType，空，新的参数[0]，真实，真实）;
            返回ResolutionRoot.Resolve（要求）.SingleOrDefault（）;
        }        公共IEnumerable的＆LT;对象＆gt; GetServices（类型的serviceType）
        {
            VAR请求= ResolutionRoot.CreateRequest（的serviceType，空，新的参数[0]，真实，真实）;
            返回ResolutionRoot.Resolve（要求）.ToList（）;
        }        公共无效的Dispose（）
        {
            VAR一次性=（IDisposable接口）ResolutionRoot;
            如果（一次性！= NULL）disposable.Dispose（）;
            ResolutionRoot = NULL;
        }
    }
 

然后我把它架在我的Global.asax：

  VAR内核=新StandardKernel（）;
            kernel.Bind（typeof运算（IRepository））至（typeof运算（库））。            GlobalConfiguration.Configuration.DependencyResolver =新NinjectDependencyResolver（内核）;
 

然后我注入一个库到API控制器是这样的：

 私人IRepository _repository;公共TestApiController（IRepository库）
{
    _repository =库;
}
 

这工作正常，但在常规控制器做同样的失败，并
错误此对象定义无参数的构造函数。<​​/ P>

任何想法？

解决方案

ASP.NET MVC使用不同的的IDependencyResolver 比ASP.NET的WebAPI namelly Sytem.Web.Mvc.IDependencyResolver 。

所以你需要为MVC控制器（幸运的是，MVC和WepAPi 的IDependencyResolver 新的 NinjectDependencyResolver 的实施几乎有同样的成员具有相同的签名，所以很容易实现）

 公共类NinjectMvcDependencyResolver：NinjectDependencyScope，
                                            System.Web.Mvc.IDependencyResolver
{
    私人只读的iKernel _KERNEL;    公共NinjectDependencyResolver（内核的iKernel）
        ：基地（内核）
    {
        _KERNEL =内核;
    }
}
 

然后你可以在里面注册的Global.asax 与

  DependencyResolver.SetResolver（新NinjectMvcDependencyResolver（内核））;
 

Possible Duplicate:
MVC3 + Ninject - How to?

In a small mvc 4 project, I'm trying to implement dependency injection using ninject.

So far, I have it working with api controllers, but I'm not having any luck with regular controllers.

I have A NinjectResolver:

public class NinjectDependencyResolver : NinjectDependencyScope, IDependencyResolver
    {
        private readonly IKernel _kernel;

        public NinjectDependencyResolver(IKernel kernel)
            : base(kernel)
        {
            _kernel = kernel;
        }

        public IDependencyScope BeginScope()
        {
            return new NinjectDependencyScope(_kernel.BeginBlock());
        }

        public override void Dispose()
        {
            _kernel.Dispose();
        }
    }

And a NinjectScope:

public class NinjectDependencyScope : IDependencyScope
    {
        protected IResolutionRoot ResolutionRoot;

        public NinjectDependencyScope(IResolutionRoot kernel)
        {
            ResolutionRoot = kernel;
        }

        public object GetService(Type serviceType)
        {
            var request = ResolutionRoot.CreateRequest(serviceType, null, new Parameter[0], true, true);
            return ResolutionRoot.Resolve(request).SingleOrDefault();
        }

        public IEnumerable<object> GetServices(Type serviceType)
        {
            var request = ResolutionRoot.CreateRequest(serviceType, null, new Parameter[0], true, true);
            return ResolutionRoot.Resolve(request).ToList();
        }

        public void Dispose()
        {
            var disposable = (IDisposable)ResolutionRoot;
            if (disposable != null) disposable.Dispose();
            ResolutionRoot = null;
        }
    }

Then I set it up in my Global.asax:

var kernel = new StandardKernel();
            kernel.Bind(typeof(IRepository)).To(typeof(Repository));

            GlobalConfiguration.Configuration.DependencyResolver = new NinjectDependencyResolver(kernel);

Then I inject a repository into an api controller like this:

private IRepository _repository;

public TestApiController(IRepository repository)
{
    _repository = repository;
}

This works fine, but doing the same in a regular controller fails with the "No parameterless constructor defined for this object" error.

Any ideas?

解决方案

ASP.NET MVC uses a different IDependencyResolver than ASP.NET WebAPi namelly Sytem.Web.Mvc.IDependencyResolver.

So you need a new NinjectDependencyResolver implementation for the MVC Controllers (luckily the MVC and WepAPi IDependencyResolver almost has the same members with the same signatures, so it's easy to implement)

public class NinjectMvcDependencyResolver : NinjectDependencyScope, 
                                            System.Web.Mvc.IDependencyResolver
{
    private readonly IKernel _kernel;

    public NinjectDependencyResolver(IKernel kernel)
        : base(kernel)
    {
        _kernel = kernel;
    }
}

And then you can register it in the Global.asax with:

DependencyResolver.SetResolver(new NinjectMvcDependencyResolver(kernel));

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