Introduction:
In this articals we will see how to implement of multiple interface in vb.net an interface can obtain one or more methods,properties,indexers and events.
But none of them are implemented in the interface itself.it is the responsibility of the class that implements the interface to define the code for implementation of these membersvb.net does not support directly multiple inheritance but using interface we can use multiple inheritance.
interface keywords to create an interface& implement keywords is use to implememt the interface.
this code implementing two interfaces.The class Computation implement two interfaces Addition and Multiplication.it declare two data members and define the code for the methods Add and multiplication.
code implementation of Multiple interfaces:
Module Module1
Interface Addition
Function Add() As Integer
End Interface
Interface Multiplication
Function Mul() As Integer
End Interface
Class Computation
Inherits Addition
Inherits Multiplication
Private x As Integer, y As Integer
Public Sub New(ByVal x As Integer, ByVal y As Integer)
Me.x = x
Me.y = y
End Sub
Public Function Add() As Integer
Return (x + y)
End Function
Public Function Mul() As Integer
Return (x * y)
End Function
End Class
Class interfaceTest1
Sub Main()
Dim com As New Computation(10, 20)
Dim add As Addition = DirectCast(com, Addition)
Console.WriteLine("sum =" & add.Add())
Dim mul As Multiplication = DirectCast(com, Multiplication)
Console.WriteLine("product =+" & mul.Mul())
End Sub
End Class
End Module Ouput of program will be:
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