LightInject multiple constructors

Question

LightInject를 잠시 사용 해왔다. 같은 유형의 여러 생성자를 지원하려고하는 걸림돌을 치십시오. 아래의 단순화 된 예를 참조하십시오. Foo는 인수의 유형 및 수에 따라 4 개의 생성자를가집니다. 생성자마다 하나의 매핑을 등록합니다. IFoo를 검색하기 위해 GetInstance를 처음 호출하면 다음 예외가 발생하여 불어납니다. 내가 뭘 놓치고 있니? 이 기능을 어떻게 수행 할 수 있습니까?

InvalidCastException : 'LightInject.ServiceContainer'형식의 개체를 'System.Object []'형식으로 캐스팅 할 수 없습니다.

Public Interface IFoo 

End Interface 

Public Class Foo 
    Implements IFoo 

    Public Sub New() 

    End Sub 

    Public Sub New(name As String) 

    End Sub 

    Public Sub New(age As Integer) 

    End Sub 

    Public Sub New(name As String, age As Integer) 

    End Sub 

End Class 


container.Register(Of IFoo, Foo) 
container.Register(Of String, IFoo)(Function(factory, name) New Foo(name)) 
container.Register(Of Integer, IFoo)(Function(factory, age) New Foo(age)) 
container.Register(Of String, Integer, IFoo)(Function(factory, name, age) New Foo(name, age)) 

Dim f1 As IFoo = container.GetInstance(Of IFoo)()      'BOOM! 
Dim f2 As IFoo = container.GetInstance(Of String, IFoo)("Scott") 
Dim f3 As IFoo = container.GetInstance(Of Integer, IFoo)(25) 
Dim f4 As IFoo = container.GetInstance(Of String, Integer, IFoo)("Scott", 25) 

Answer 1

당신은 완전히 이러한 목표를 달성하기 위해 공장을 형식화 할 수 있습니다. 당신이 가치를 추가 느끼는 경우

http://www.lightinject.net/#typed-factories

Imports LightInject 

Namespace Sample 
    Class Program 
     Private Shared Sub Main(args As String()) 
      Console.WriteLine("Go") 

      Dim container = New ServiceContainer() 
      container.Register(Of FooFactory)() 

      Dim fooFactory = container.GetInstance(Of FooFactory)() 
      Dim f1 As IFoo = fooFactory.Create() 
      Dim f2 As IFoo = fooFactory.Create("Scott") 
      Dim f3 As IFoo = fooFactory.Create(25) 
      Dim f4 As IFoo = fooFactory.Create("Scott", 25) 

      Console.WriteLine("Stop") 
      Console.ReadLine() 
     End Sub 
    End Class 

    Public Interface IFoo 

    End Interface 

    Public Class Foo 
     Implements IFoo 


     Public Sub New() 
     End Sub 


     Public Sub New(name As String) 
     End Sub 


     Public Sub New(age As Integer) 
     End Sub 


     Public Sub New(name As String, age As Integer) 
     End Sub 

    End Class 

    Public Class FooFactory 

     Public Function Create() As IFoo 
      Return New Foo() 
     End Function 

     Public Function Create(name As String) As IFoo 
      Return New Foo(name) 
     End Function 

     Public Function Create(age As Integer) As IFoo 
      Return New Foo(age) 
     End Function 

     Public Function Create(name As String, age As Integer) As IFoo 
      Return New Foo(name, age) 
     End Function 
    End Class 
End Namespace 

참고

, 당신은 IFooFactory 인터페이스를 만들 수 있습니다.