Verifying a URL

[julian]

Hi,

I have situation where I want to use a stylesheet stored
in one of two possible urls. Basically I need to say if
the first url doesn't exist, use the second url.

I can do this by creating a WebRequest and intercepting
the exception raised by the GetResponse if the first url
doesn't exisit, but this feels like a hack to me and I was
hoping there would be some simple way (similar to
File.Exists) to check whether a url refered to a file that
was actually there?

Any help would be appreciated.

Thanks.

 

[Mario Vargas]

Actually, before I finished reading your post I thought about telling you to
use the WebRequest class. I think you are on the right track, but you might
want to consider caching the URL so that it's not done for every request to
your web form.

Mario

 

[julian]

Thanks for the responses. I guess I will leave it the way
it is then - it certainly works. I just feel a bit
guilty / lazy to be using Exceptions to handle an expected
condition (i.e. not an error).

 

[Mario Vargas]

Actually, that's why structured exception handling was created. You catch an
exception to recover from it. That's how your applications come become
"smarter." They learn from their mistakes, he he.

Mario