Obtaining class namespace from absolute url request string

[Pete]

Hi,

I am writing a pre-handler page for aspx pages, in which I
want to call a custom method on the code-behind class file
for the aspx page.

In order to do this I need to somehow get the class full
namespace for the codebehind aspx page from the request
absolute url that I have in the pre-handler page.

The question is how do I obtain the class namespace string
so I can use reflection on the webserver dll file to load
this dynamically. At present I am using a lookup table
that maps the absolute url to the namespace class, and
then using the assembly.gettype() and then creating an
instance of the class from using the type.

I am sure there must be some method available that doesn't
require maintainence of this list?? - as the default pre-
handler passes the absolute url request to the aspx page
by default anyway. Any ideas?


Thanks.


Pete.

 

[John Saunders]

Hi,

I am writing a pre-handler page for aspx pages, in which I
want to call a custom method on the code-behind class file
for the aspx page.

In order to do this I need to somehow get the class full
namespace for the codebehind aspx page from the request
absolute url that I have in the pre-handler page.

Can you read the .aspx file? If so, you can read the @Page directive, which
should include a Inherits attribute which should tell you the full name of
the class. I believe that should be enough to load the class and create an
instance of it so that you can call a method.

 

[Pete]

John,

When you say read, are you meaning reading the file at
runtime, and parsing this information out from the file?

Does the default .Net pre-page handler use this technique
to get the code behind class to instantiate for the page?,
surely not?? Or if so, is there some function that I can
call to get the code-behind class for the aspx page?


Thanks.


Pete.

 

[John Saunders]

John,

When you say read, are you meaning reading the file at
runtime, and parsing this information out from the file?

Yes, I meant reading the file and parsing the information. There's not that
much of it, after all.

Does the default .Net pre-page handler use this technique
to get the code behind class to instantiate for the page?,
surely not?? Or if so, is there some function that I can
call to get the code-behind class for the aspx page?

Why? What would be wrong with that technique? Especially if you cache the
result?

I don't know if this is what ASP.NET uses.
--
John Saunders
Internet Engineer
(e-mail address removed)

 

[Pete]

Caching sounds good but it would be nice if someone from
Microsoft could give an indication as to how ASP.Net does
it internally. Maybe the information is already known in
a property of a object model that is accessible from the
pre-page handler, perhaps??


Pete.