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vb.net implement strategy pattern with different interface

开发者 https://www.devze.com 2023-03-11 09:32 出处:网络
is it possible to implement strategy pattern with different parameters in VB.net? For example I have the following code:

is it possible to implement strategy pattern with different parameters in VB.net? For example I have the following code:

Public Interface InterfaceDataManipulation
Sub updateMyData()
End Interface

How to implemente updateMyData in the class that implements above interface class with different parameter, for example in class x :

Public Class X
Implements InterfaceDataManipulation
Public Sub updateMyData(ByVal x as String)
 Console.Writeline(x)
End Sub
End Class

But开发者_运维知识库 the IDE raises an error "class x must implement updateMyData on interface InterfaceDataManipulation"


By adding a parameter you're not implementing the interface - The idea of the interface is that people can use your class by only knowing about the interface -so your sub with parameter wouldn't match their expectations.

There are probably many ways of skinning this cat, but these are a few of the options:

  • Don't use the interface
  • Implement your version of updateMyData as an overload, but you should still implement the original without the parameter aswell
  • Pass in x as a property to your class, that the updateMyData method can then use, while still having a signature that matches the interface.


Public Class X
Implements InterfaceDataManipulation
Public Sub updateMyData(ByVal x as String) Implements InterfaceDataManipulation.updateMyData
 Console.Writeline(x)
End Sub
End Class

The method signature needs to be appended with the method it is implementing in the interface as show above.

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