Question about interfaces

[Geoff Pennington]

Is there an easy way to find out what classes implement a given interface?
For example, it might be useful to know what classes implement ICollectible.

Much obliged,
Geoff.

[Imran Koradia]

Re: Question about interfaces

If TypeOf myCollection Is ICollectible Then
' myCollection implements ICollectible
End If

If GetType(ICollec tible).IsAssign ableFrom(myColl ection.GetType) Then
'again, myCollection implements ICollectible
End If

In C#, I believe you can use the typeof keyword to get the type of an
object.

Also, You can use the Type.GetInterfa ces method to get a collection of type
objects for all the interfaces implemented by an object. You can also use
the Type.GetInterfa ce method to get an interface by name.

hope that helps..
Imran.


"Geoff Pennington" <GeoffPenn@veri zon.netNoSpam> wrote in message
news:evJ9nyfsEH A.3152@TK2MSFTN GP14.phx.gbl...[color=blue]
> Is there an easy way to find out what classes implement a given interface?
> For example, it might be useful to know what classes implement[/color]
ICollectible.[color=blue]
>
> Much obliged,
> Geoff.
>
>[/color]

[Jon Skeet [C# MVP]]

Re: Question about interfaces

Geoff Pennington <GeoffPenn@veri zon.netNoSpam> wrote:[color=blue]
> Is there an easy way to find out what classes implement a given interface?
> For example, it might be useful to know what classes implement ICollectible.[/color]

Again, MSDN is your friend. Go to the overview page for the interface,
and it lists the classes which implement it directly.

--
Jon Skeet - <skeet@pobox.co m>

http://www.pobox.com/~skeet

If replying to the group, please do not mail me too

[Geoff Pennington]

Re: Question about interfaces

If I understand correctly, you are answering the opposite question from the
one I asked. Your reply seems to address the question "What interfaces does
this class implement?", but what I want to know is "What classes implement
this interface?".

Sometimes, when choosing a class for a specific purpose, I want to be sure I
have considered all the options.

Geoff.

"Imran Koradia" <nospam@microso ft.com> wrote in message
news:ekPm45fsEH A.1216@TK2MSFTN GP10.phx.gbl...[color=blue]
> If TypeOf myCollection Is ICollectible Then
> ' myCollection implements ICollectible
> End If
>
> If GetType(ICollec tible).IsAssign ableFrom(myColl ection.GetType) Then
> 'again, myCollection implements ICollectible
> End If
>
> In C#, I believe you can use the typeof keyword to get the type of an
> object.
>
> Also, You can use the Type.GetInterfa ces method to get a collection of[/color]
type[color=blue]
> objects for all the interfaces implemented by an object. You can also use
> the Type.GetInterfa ce method to get an interface by name.
>
> hope that helps..
> Imran.
>
>
> "Geoff Pennington" <GeoffPenn@veri zon.netNoSpam> wrote in message
> news:evJ9nyfsEH A.3152@TK2MSFTN GP14.phx.gbl...[color=green]
> > Is there an easy way to find out what classes implement a given[/color][/color]
interface?[color=blue][color=green]
> > For example, it might be useful to know what classes implement[/color]
> ICollectible.[color=green]
> >
> > Much obliged,
> > Geoff.
> >
> >[/color]
>
>[/color]

[Geoff Pennington]

Re: Question about interfaces

OK, good. Thanks.

"Jon Skeet [C# MVP]" <skeet@pobox.co m> wrote in message
news:MPG.1bd8a6 53a97f5e3398b6d 5@msnews.micros oft.com...[color=blue]
> Geoff Pennington <GeoffPenn@veri zon.netNoSpam> wrote:[color=green]
> > Is there an easy way to find out what classes implement a given[/color][/color]
interface?[color=blue][color=green]
> > For example, it might be useful to know what classes implement[/color][/color]
ICollectible.[color=blue]
>
> Again, MSDN is your friend. Go to the overview page for the interface,
> and it lists the classes which implement it directly.
>
> --
> Jon Skeet - <skeet@pobox.co m>
> http://www.pobox.com/~skeet
> If replying to the group, please do not mail me too[/color]

[Imran Koradia]

Re: Question about interfaces


"Geoff Pennington" <GeoffPenn@veri zon.netNoSpam> wrote in message
news:e6DvkAgsEH A.3984@TK2MSFTN GP09.phx.gbl...[color=blue]
> If I understand correctly, you are answering the opposite question from[/color]
the[color=blue]
> one I asked. Your reply seems to address the question "What interfaces[/color]
does[color=blue]
> this class implement?", but what I want to know is "What classes implement
> this interface?".[/color]

My apologies. I misread your question. However, there's no way through code
to figure out what classes implement a given interface. If you are talking
about classes and interfaces in the .NET class library, you can look up the
MSDN documentation for the given interface - it'll have a list of classes
that directly implement the interface.

hope that helps..
Imran.