How can we acheive inheritance in VB.NET

Q

How can we acheive inheritance in VB.NET ?

✍: Guest

A

Inheritance is achieved by using “Inherits” keyword in VB.NET (For C# it is “:”). Simple Sample is provided in CD for understanding inheritance in folder “WindowsApplicationInheritance”. There are two classes one is the parent “ClsParent” and second is the child “ClsChild”. Parent class has a string which has to parsed for junk data “@” and “/”.ClsParent has the functionality which parses only cleans up “@”.”ClsChild” then inherits from parent and adds extra functionality by parsing “/”.

Public Class ClsParent
Protected strData As String = “jksdhkj@dadad///ajkdhsjakd”
Public Function Parse() As String
Dim PstrData As String
PstrData = strData
PstrData = Replace(PstrData, “@”, “”)
Return PstrData
End Function
Public Function GetActualString() As String
Return strData
End Function
End Class



Above is the source which parses only “@” of strData variable. Public Class ClsChild Inherits ClsParent ‘ this is child and a special parse function is added which will also parse “/” Public Function ParseBackSlash() Dim PstrData As String PstrData = Me.Parse() PstrData = Replace(PstrData, “/”, “”) Return PstrData End Function End Class

Above is the source code for “ClsChild” which does the remaining work. It adds extra functionality by parsing “/” junk character’s of the data.
Note:- Strdata was accessible only because it was defined as protected in the parent class.

2007-10-23, 4759👍, 0💬