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+---- Thread: [C#] [C#] Inheritance and virtual methods (/showthread.php?tid=608980)
[C#] Inheritance and virtual methods - killerdoob420 - Aug 13, 2010
This tutorial will explain inheritance and virtual methods and how to use them in C#(im assuming you have a basic knowledge of oop concepts). Inhertance is when a class uses another class has a base and aquires all its variables and methods, take this class for example:
Code
class Derp
{
public int var;
public void Write(string text)
{
Console.Write(text);
}
}Code
class Herp : Derp
{
public void WriteLine(string text)
{
Write(text + "\n");
}
}As you can see the class Herp contains the method and varible from its base class as well has the other method we added to it.
Virtual methods are a way of changing the behavior of inherited methods:
Code
class Derp
{
public virtual void DoWork()
{
Console.WriteLine("Doing base class work");
}
}Code
class Herp : Derp
{
public override void DoWork()
{
Console.WriteLine("Doing inherited class work");
base.DoWork();
}
}Doing inherited class work
Doing base class work
please leave a comment if you liked this tutorial or if you have any problems or questions about it
* - laptopguy - Aug 13, 2010
Very nice tutorial. Not the biggest but it's straight to the point and informative. Nice one, and rated 5 stars 😝
* - killerdoob420 - Aug 13, 2010
(Aug 13, 2010 11:41 AM)kRaeTwin Wrote: Very nice tutorial. Not the biggest but it's straight to the point and informative. Nice one, and rated 5 stars 😝
thanks, i tried to be a clear as possible
* - enacje - Aug 13, 2010
the problem with this kind of subjects is that it is kinda hard to explain when to use it. I'm working on a polymorphism tutorial but I can't think of some good examples when to use it on a way people understand it :P
Same for you you didn't mention when and why you should use it
* - killerdoob420 - Aug 13, 2010
(Aug 13, 2010 12:01 PM)enacje Wrote: the problem with this kind of subjects is that it is kinda hard to explain when to use it. I'm working on a polymorphism tutorial but I can't think of some good examples when to use it on a way people understand it :PI use this alot for games, but polymorphism is a tricky one 😧
Same for you you didn't mention when and why you should use it
* - laptopguy - Aug 13, 2010
(Aug 13, 2010 12:09 PM)killerdoob420 Wrote: I use this alot for games, but polymorphism is a tricky one 😧
Could you give an example in how to use this in a standard Windows Application ? Like what is it's values ?
* - killerdoob420 - Aug 13, 2010
(Aug 13, 2010 12:10 PM)kRaeTwin Wrote: Could you give an example in how to use this in a standard Windows Application ? Like what is it's values ?well i guess you could use it for user profiles or something, i can code and actuall example if you like
* - laptopguy - Aug 13, 2010
(Aug 13, 2010 12:29 PM)killerdoob420 Wrote: well i guess you could use it for user profiles or something, i can code and actuall example if you like
Sure, that would be good mate.
* - b0tn3rd - Aug 13, 2010
Well the typical example of the usecase is in multiple implementations of things that act alike:
e.g. 5 different types of buttons...
e.g. 5 different commands called from a single parser.
Make a bassclass IrcCommand.
Make a derived class IrcCommandScan
Make a derived class IrcCommandDownload
Make a string map to IrcCommand reference and register your implementations there. Makes it easy to have your commands extendable without having a huge if then else clause...
* - killerdoob420 - Sep 7, 2010
bringing some of my old tuts up
* - killerdoob420 - Oct 22, 2010
* - eliteh4xer - Jul 4, 2011
Constructor Can't Be Inherited Why