可能重复:
MVC3 + Ninject - How to?
在一个小型的mvc 4项目中,我尝试使用ninject实现依赖注入。
到目前为止,我已经让它与api控制器一起工作了,但我对常规控制器没有任何好运。
我有一个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();
}
}
和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;
}
}
然后我在Global.asax中设置它:
var kernel = new StandardKernel();
kernel.Bind(typeof(IRepository)).To(typeof(Repository));
GlobalConfiguration.Configuration.DependencyResolver = new NinjectDependencyResolver(kernel);
然后我将存储库注入到这样的api控制器中:
private IRepository _repository;
public TestApiController(IRepository repository)
{
_repository = repository;
}
这样可以正常工作,但在常规控制器中执行相同操作会失败 &#34;没有为此对象定义的无参数构造函数&#34;错误。
有什么想法吗?
答案 0 :(得分:5)
ASP.NET MVC使用与ASP.NET WebAPi name IDependencyResolver
不同的Sytem.Web.Mvc.IDependencyResolver
。
所以你需要为MVC控制器提供一个新的NinjectDependencyResolver
实现(幸运的是MVC和WepAPi IDependencyResolver
几乎有相同的成员具有相同的签名,所以它很容易实现)
public class NinjectMvcDependencyResolver : NinjectDependencyScope,
System.Web.Mvc.IDependencyResolver
{
private readonly IKernel _kernel;
public NinjectDependencyResolver(IKernel kernel)
: base(kernel)
{
_kernel = kernel;
}
}
然后您可以在Global.asax
中注册:
DependencyResolver.SetResolver(new NinjectMvcDependencyResolver(kernel));