Q re Extension Methods

[Simon Woods]

Hi

I have 2 classes which are both instantiated by shared factory methods
and both implement a common interface.

Public Class Factory

Public Shared Function CreateMyClass1( ) As MyClass1
Return New MyClass1
End Function

Public Shared Function CreateMyClass2( ) As MyClass2
Return New MyClass2
End Function

End Class


Public Interface IItemContainer
Readonly Property ItemGroups as
System.Collecti ons.Generic.Dic tionary(Of String, ItemGroup)
End Interface

Public Class MyClass1
Implements IItemContainer
....
Private ReadOnly Property ItemGroups() As
System.Collecti ons.Generic.Dic tionary(Of String, ItemGroup) _
Implements IItemGroupConta iner.ItemGroups
Get
Return m_itemGroups
End Get
End Property
....
End Class

Public Class MyClass2
Implements IItemContainer
....
Private ReadOnly Property ItemGroups() As
System.Collecti ons.Generic.Dic tionary(Of String, ItemGroup) _
Implements IItemGroupConta iner.ItemGroups
Get
Return m_itemGroups
End Get
End Property
....
End Class

I also have an extension method so as not to duplicate code

<System.Runtime .CompilerServic es.Extension()_
Public Function ItemCount(ByVal p_container As IItemContainer) As Integer
Return CType((From g In p_container.Ite mGroups _
Select g.Value.Count). Sum(), Integer)
End Function


What I'm finding is that one of the classes is not recognising the
extension methods so I'm getting compilation errors for each extension
method call which is made. The other class is behaving correctly.

Any thoughts

Thx

Simon

[Simon Woods]

Re: Q re Extension Methods

Oops

I had the tests in different classes and hadn't included the necessary
imports ...

Sorry

S


Simon Woods wrote:

Hi
>
I have 2 classes which are both instantiated by shared factory methods
and both implement a common interface.
>
Public Class Factory
>
Public Shared Function CreateMyClass1( ) As MyClass1
Return New MyClass1
End Function
>
Public Shared Function CreateMyClass2( ) As MyClass2
Return New MyClass2
End Function
>
End Class
>
>
Public Interface IItemContainer
Readonly Property ItemGroups as
System.Collecti ons.Generic.Dic tionary(Of String, ItemGroup)
End Interface
>
Public Class MyClass1
Implements IItemContainer
...
Private ReadOnly Property ItemGroups() As
System.Collecti ons.Generic.Dic tionary(Of String, ItemGroup) _
Implements IItemGroupConta iner.ItemGroups
Get
Return m_itemGroups
End Get
End Property
...
End Class
>
Public Class MyClass2
Implements IItemContainer
...
Private ReadOnly Property ItemGroups() As
System.Collecti ons.Generic.Dic tionary(Of String, ItemGroup) _
Implements IItemGroupConta iner.ItemGroups
Get
Return m_itemGroups
End Get
End Property
...
End Class
>
I also have an extension method so as not to duplicate code
>
<System.Runtime .CompilerServic es.Extension()_
Public Function ItemCount(ByVal p_container As IItemContainer) As Integer
Return CType((From g In p_container.Ite mGroups _
Select g.Value.Count). Sum(), Integer)
End Function
>
>
What I'm finding is that one of the classes is not recognising the
extension methods so I'm getting compilation errors for each extension
method call which is made. The other class is behaving correctly.
>
Any thoughts
>
Thx
>
Simon