How to use error info in data access layer to trigger message to user

I have a delete method for a table that doesn't work when the key from that table is associated with records in another table. When the user attempts to delete a one of these records, a sql exception number 547 is thrown in the data access layer. When this error number is thrown, I want to notify the user of what is going on. I figured I could just store the error number in a session variable and check for it when the code got back to the procedure that called the delete method in the data access layer, but I can't create a session variable there - I guess because it's a seperate class. Anyway, how can I get the error number back to the calling procedure so I can check for it? I'm figuring there is some standard way that people use that I'm not aware of. Thanks.

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FeyoAsked:
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prakash_prkCommented:
best you can use exceptions.

throw an exception from the DAL part.
catch the exception in the called procedure.
display the message

you can use the session varibales by httpcontext . but it is not advisable

System.Web.HttpContext.Current.Session

Regards
prakash
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FeyoAuthor Commented:
Should I be able to catch that exception where I call the procedure? For some reason, it's not catching.
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prakash_prkCommented:
did u directly call the DAL?
can u post a sample code?
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FeyoAuthor Commented:
This does seem to work. Thanks.
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