Type argument... does not inherit from... RSS

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  Leschandrew

  Member

  1 Points

  11 Posts

  Type argument... does not inherit from...

  Dec 30, 2012 02:45 AM|LINK

  Hi, I'm running into a problem in a tutorial I'm following along with in the book "Pro ASP.NET MVC 3 Framework". The code examples are written in C#, but I'm coding everything in VB. In the code under the "NinjectControllerFactory" file, I'm getting an error in the line I marked using the word "ERROR" in bold. Visual Studio is underlining EFProductRepository and giving me this error:

  Type argument 'SportsStore.WebUI.Concrete.EFProductRepository' does not inherit from or implement the constraint type 'SportsStore.WebUI.Abstract.IProductRepository'.

  I'm really not sure how to fix this error, and I would appreciate anyone's help. I marked each individual code file that might relate with a bold header. 

  NinjectControllerFactory
  
  Imports System
  Imports System.Web.Mvc
  Imports System.Web.Routing
  Imports Ninject
  Imports System.Linq
  Imports SportsStore.WebUI.Abstract
  Imports SportsStore.WebUI.Concrete
  Imports SportsStore.WebUI.Entities
  
  Namespace SportsStore.WebUI.Infrastructure
  
      Public Class NinjectControllerFactory
          Inherits DefaultControllerFactory
  
          Private ninjectKernel As IKernel
  
          Private Sub AddBindings()
  
           ERROR-->   ninjectKernel.Bind(Of IProductRepository).To(Of EFProductRepository)()
  
          End Sub
  
          Public Sub New()
              ninjectKernel = New StandardKernel()
              AddBindings()
          End Sub
  
          Protected Overrides Function GetControllerInstance(ByVal requestContext As RequestContext, ByVal controllerType As Type) As IController
              Return If(controllerType Is Nothing, Nothing, DirectCast(ninjectKernel.Get(controllerType), IController))
              'TODO: Warning!!!, inline IF is not supported ?
          End Function
  
      End Class
  End Namespace
  
  IProductRepository
  
  Imports System.Linq
  Imports SportsStore.WebUI.Entities
  Namespace Abstract
  
      Public Interface IProductRepository
  
          ReadOnly Property Products() As IQueryable(Of Product)
  
      End Interface
  End Namespace
  
  EFProductRepository
  
  Imports System.Linq
  Imports SportsStore.WebUI.Abstract
  Imports SportsStore.WebUI.Entities
  
  Namespace Concrete
      Public Class EFProductRepository
  
          Public Class EFProductRepository
              Private context As New EFDbContext
  
              ReadOnly Property Products As IQueryable(Of Product)
                  Get
                      Return context.Products
                  End Get
              End Property
          End Class
  
      End Class
  End Namespace

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  CPrakash82

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  Re: Type argument... does not inherit from...

  Dec 30, 2012 03:03 AM|LINK

  Leschandrew

  Public Class EFProductRepository 

  This should implement -  IProductRepository which is missing. also why you have duplicate nested class definition.

  Public Class EFProductRepository
           Implements IProductRepository
  
   Private context As New EFDbContext
  
   ReadOnly Property Products As IQueryable(Of Product)
             Get
                   Return context.Products
             End Get
   End Property
  End Class

  http://cprakash.com
  • Edited by CPrakash82 on Dec 30, 2012 03:04 AM
  • Edited by Leschandrew on Dec 30, 2012 03:26 AM
  • Edited by Leschandrew on Dec 30, 2012 03:27 AM
  • Marked as answer by Leschandrew on Dec 30, 2012 03:27 AM
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  ignatandrei

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  Re: Type argument... does not inherit from...

  Dec 30, 2012 03:04 AM|LINK

  1. Duplicate definition

  Leschandrew

    Public Class EFProductRepository
  
          Public Class EFProductRepository

  2.

  Public Class EFProductRepository Implements IProductRepository

  My .NET blog : http://msprogrammer.serviciipeweb.ro/ |2012 Programmer tools
  • Edited by Leschandrew on Dec 30, 2012 03:26 AM
  • Edited by Leschandrew on Dec 30, 2012 03:27 AM
• • Reply
  

  Leschandrew

  Member

  1 Points

  11 Posts

  Re: Type argument... does not inherit from...

  Dec 30, 2012 03:26 AM|LINK

  Thanks, your advice pointed me in the right direction and here is what ended up fixing it: 

  Imports System.Linq
  Imports SportsStore.WebUI.Abstract
  Imports SportsStore.WebUI.Entities
  
  Namespace Concrete
      Public Class EFProductRepository
          Implements IProductRepository
  
          Private context As New EFDbContext
  
          Public ReadOnly Property Products As System.Linq.IQueryable(Of Entities.Product) Implements Abstract.IProductRepository.Products
              Get
                  Return context.Products
              End Get
          End Property
      End Class
  End Namespace