aggregation in C#

[Jozsef Bekes]

Hi,

I would like to implement aggregation in C#, therefore I'd need to implement
the queryinterface COM function of a class. I am not sure whether this can
be done, and if yes where to start. If someone has an example, a hint or
anything that might help, please share it with me.

Thanks and Regards,
Jozsi

[Nick Malik [Microsoft]]

Why do you need to implement a COM interface to do aggregation?

Strict aggregation simply requires the declaration of a public or private
member variable.

If you mean "collections" then there is a set of collection classes
available already. No need to call COM for that.

On the other hand, if you have a need for a COM app to call your .Net app,
google on ".net COM Interop"

--
--- Nick Malik [Microsoft]
MCSD, CFPS, Certified Scrummaster
http://blogs.msdn.com/nickmalik

Disclaimer: Opinions expressed in this forum are my own, and not
representative of my employer.
I do not answer questions on behalf of my employer. I'm just a
programmer helping programmers.
--
"Jozsef Bekes" <bj****@hotmail.com> wrote in message
news:u6****************@tk2msftngp13.phx.gbl...

Hi,

I would like to implement aggregation in C#, therefore I'd need to
implement the queryinterface COM function of a class. I am not sure
whether this can be done, and if yes where to start. If someone has an
example, a hint or anything that might help, please share it with me.

Thanks and Regards,
Jozsi

[Jozsef Bekes]

Hi Nick,

thank you for your answer. Actually I need to rewrite an app in C# that was
written in VB6 and VC++. I need to support old clients connecting to my
converted app via COM, and new clients connecting via .net. The old
architecture (that I am not supposed to change) involves aggregation.
The only way to supoort old clients seems to me to change aggregation to
containment, in other words to derive from the aggregated IF as well, and
implement all the functions in a way that they just forward the call to the
member, however this seems a bit stupid. It does for sure, I have
implemented it :-). If you have a better suggestion, please let me know.

Regards,
Jozsi

"Nick Malik [Microsoft]" <ni*******@hotmail.nospam.com> wrote in message
news:Y7********************@comcast.com...

Why do you need to implement a COM interface to do aggregation?

Strict aggregation simply requires the declaration of a public or private
member variable.

If you mean "collections" then there is a set of collection classes
available already. No need to call COM for that.

On the other hand, if you have a need for a COM app to call your .Net app,
google on ".net COM Interop"

--
--- Nick Malik [Microsoft]
MCSD, CFPS, Certified Scrummaster
http://blogs.msdn.com/nickmalik

Disclaimer: Opinions expressed in this forum are my own, and not
representative of my employer.
I do not answer questions on behalf of my employer. I'm just a
programmer helping programmers.
--
"Jozsef Bekes" <bj****@hotmail.com> wrote in message
news:u6****************@tk2msftngp13.phx.gbl...

Hi,

I would like to implement aggregation in C#, therefore I'd need to
implement the queryinterface COM function of a class. I am not sure
whether this can be done, and if yes where to start. If someone has an
example, a hint or anything that might help, please share it with me.

Thanks and Regards,
Jozsi