Hi All
I have a custom class that is derived from the PictureBox class. One of the
properties from the PictureBox class is "SizeMode" and in my custom class I
want to disable the user from being able to modify this.

How can I remove this property from my class?

Thanks,
Steve

"Steven Garrad" <(E-Mail Removed)> wrote in message
news:087B334B-5D1C-4688-8FDF-(E-Mail Removed)...
> Hi All
> I have a custom class that is derived from the PictureBox class. One of
> the properties from the PictureBox class is "SizeMode" and in my custom
> class I want to disable the user from being able to modify this.
>
> How can I remove this property from my class?
>
> Thanks,
> Steve

One possibility is override.

http://msdn2.microsoft.com/en-us/library/ebca9ah3(VS.71).aspx

I've tried to override this, but SizeMode does not appear.

"pvdg42" <(E-Mail Removed)> wrote in message
news:#(E-Mail Removed)...
>
> "Steven Garrad" <(E-Mail Removed)> wrote in message
> news:087B334B-5D1C-4688-8FDF-(E-Mail Removed)...
>> Hi All
>> I have a custom class that is derived from the PictureBox class. One of
>> the properties from the PictureBox class is "SizeMode" and in my custom
>> class I want to disable the user from being able to modify this.
>>
>> How can I remove this property from my class?
>>
>> Thanks,
>> Steve
>
> One possibility is override.
>
> http://msdn2.microsoft.com/en-us/library/ebca9ah3(VS.71).aspx
>
>

Hi,

"pvdg42" <(E-Mail Removed)> wrote in message
news:%(E-Mail Removed)...
>
> "Steven Garrad" <(E-Mail Removed)> wrote in message
> news:087B334B-5D1C-4688-8FDF-(E-Mail Removed)...
>> Hi All
>> I have a custom class that is derived from the PictureBox class. One of
>> the properties from the PictureBox class is "SizeMode" and in my custom
>> class I want to disable the user from being able to modify this.
>>
>> How can I remove this property from my class?

SizeMode is not virtual , so you cannot override it

Hi,

"Steven Garrad" <(E-Mail Removed)> wrote in message
news:087B334B-5D1C-4688-8FDF-(E-Mail Removed)...
> Hi All
> I have a custom class that is derived from the PictureBox class. One of
> the properties from the PictureBox class is "SizeMode" and in my custom
> class I want to disable the user from being able to modify this.
>
> How can I remove this property from my class?

you have to use the "new" keyword to hide the parent implementation:

new public XXXX SizeMode{


I do not remmber that SizeMode returns that's why the XXXX

In article <(E-Mail Removed)>, "Ignacio Machin
\( .NET/ C# MVP \)" <machin TA laceupsolutions.com> says...
> Hi,
>
> "Steven Garrad" <(E-Mail Removed)> wrote in message
> news:087B334B-5D1C-4688-8FDF-(E-Mail Removed)...
> > Hi All
> > I have a custom class that is derived from the PictureBox class. One of
> > the properties from the PictureBox class is "SizeMode" and in my custom
> > class I want to disable the user from being able to modify this.
> >
> > How can I remove this property from my class?
>
> you have to use the "new" keyword to hide the parent implementation:
>
> new public XXXX SizeMode{
>
>
> I do not remmber that SizeMode returns that's why the XXXX
>
>
>

... though there's nothing to stop a user casting your class to a
PictureBox, and using the original SizeMode property.

The only way to completely hide it is to encapsulate a PictureBox
internally, rather than deriving from it.

Steven Garrad <(E-Mail Removed)> wrote:
> I have a custom class that is derived from the PictureBox class. One of the
> properties from the PictureBox class is "SizeMode" and in my custom class I
> want to disable the user from being able to modify this.
>
> How can I remove this property from my class?

Doing so would break Liskov's Substitutability Principle. Basically, if
you don't want type X to have all of the same members available as type
Y, you shouldn't derive type X from type Y in the first place.

--
Jon Skeet - <(E-Mail Removed)>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

It's not that I don't want it, but it's that I don't want it to be changed
by the user of the control.


"Jon Skeet [C# MVP]" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Steven Garrad <(E-Mail Removed)> wrote:
>> I have a custom class that is derived from the PictureBox class. One of
>> the
>> properties from the PictureBox class is "SizeMode" and in my custom class
>> I
>> want to disable the user from being able to modify this.
>>
>> How can I remove this property from my class?
>
> Doing so would break Liskov's Substitutability Principle. Basically, if
> you don't want type X to have all of the same members available as type
> Y, you shouldn't derive type X from type Y in the first place.
>
> --
> Jon Skeet - <(E-Mail Removed)>
> http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
> If replying to the group, please do not mail me too

Steven Garrad <(E-Mail Removed)> wrote:
> It's not that I don't want it, but it's that I don't want it to be changed
> by the user of the control.

That's the same thing, effectively. You want to stop the user from
treating the control as if it were a normal PictureBox, which is what
Liskov's principle is about.

--
Jon Skeet - <(E-Mail Removed)>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too