How to call a base class of a base class

[macap.usenet]

Hello,

I´ve a problem which maybe sounds a bit easy, but it is hard do ask
google for the problem.

I have a CheckBoxList and a class derived from this checkboxlist

Let´s say:

ChildCheckBoxLi st : CheckBoxList

this class has a method

protected override void CreateChildCont rols()

which calls the base method (e.g. CheckBoxList.Cr eateChildContro ls):

base.CreateChil dControls();

now I want to make my own CheckBoxList class derived from
ChildCheckBoxLi st:

OwnChildCheckBo xList : CheckBoxList

where I want to override the CreateChildCont rols()
but there I want to call the CreateChildCont rols() method of
CheckBoxList and _not_ of ChildCheckBoxLi st.

How can I do this?

base.base.Creat eChildControls( );

does not work.
Regards,

Martin

[Walter Frank]

Hi Martin,

just cast your object to the desired type and then call the function:

((CheckBoxList) this).CreateChi ldControls();
Walter

[Walter Frank]

Hi Martin,

sorry for my post. This does not work with protected Members.
Only if the function you are calling is public.

regards
Walter

[AJ]

.... and not even then, if it's a virtual function!
In article <13************ *************** *******@microso ft.com>,
cs*******@web.d e says...

Hi Martin,

sorry for my post. This does not work with protected Members.
Only if the function you are calling is public.

regards
Walter

[macap.usenet]

sorry for my post. This does not work with protected Members.
Only if the function you are calling is public.

On 19 Nov., 14:38, AJ <no...@nowhere. comwrote:

... and not even then, if it's a virtual function!

Hi all,

thanks for your answers. I found out that I do not need it, because it
´s not necessary to call the base-method to solve my problem.

But all in all...

Is there no way to call a base class of a base class?
As simple example...

What for example if I have a class "Bike" and a class "Motorbike" and
I want to create a class
"HondaMotorbike " which should derive everything from "Motorbike"
except a method "drive()" because
I want to drive my HondaMotorbike like a normal Bike (Bicycle)?

I know it´s a stupid example but I think it´s clear what my general
question is.
So how can I do that in C#?
Regards,

Martin

[Peter Morris]

>>

I know it´s a stupid example but I think it´s clear what my general
question is.
So how can I do that in C#?
<<

You can't, and you shouldn't be able to in any decent OOP. What happens if
later you introduce another class FuelledBike between Bicycle and Motorcyle?
Your could wouldn't behave as expected. You explicitly define which class
you are extending, and which methods you are going to override, with the
ability to call the base method at any point you wish. You should not care
HOW the base class implements its functionality (whether inherited,
overridden, etc), just what it does.

--
Pete
====
http://mrpmorris.blogspot.com
http://www.capableobjects.com