Re: Runtime Determination of Interface Support

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From: Richard Blewett [DevelopMentor] (richardb_at_develop.com)
Date: 09/16/04 

To: microsoft.public.dotnet.languages.csharp
Date: Thu, 16 Sep 2004 00:37:34 -0700

One thing to remember with this approach is that the type check will be performed twice compared to the as operatorss once. Its much faster to compare a reference to null than to perform a type check.

 Regards

 Richard Blewett - DevelopMentor

 http://staff.develop.com/richardb/weblog

   nntp://news.microsoft.com/microsoft.public.dotnet.languages.csharp/>

 Pete,
 In addition to the other comments (the as operator).
 
 You can also use the is operator.
 
 object anObject;
 if (anObject is IDisposable)
 {
 IDisposable disposable = (IDisposable)anObject;
 // do something with disposable
 }
 
 Hope this helps
 Jay
 
 "Pete" <anonymous@devdex.com> wrote in message
 news:OA9lrvzmEHA.1716@TK2MSFTNGP12.phx.gbl...
> Hi,
>
> Is it possible for an application to determine, at runtime, whether an
> arbitrary class supports a known interface?
>
> I can think of a couple of cludgy ways of doing this (the calling app
> will know the details of the interface, so worst-case could just blindly
> try invoking a method) but I'm scanning through the reflection
> documentation to find a clean way of doing this, and haven't found
> anything thus far.
>
> Thanks,
> Pete
>
>
>
> *** Sent via Developersdex http://www.developersdex.com ***
> Don't just participate in USENET...get rewarded for it!
 
 
 
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