ASP.NET Error redirect then use Back button (or programmed button)

[phancey]

hi,

I've got an asp.net app. In case of unhandled exceptions, the
web.config is set up to redirect the user to an error page. If the
user then clicks the back button to retry, they have lost all the data
they entered. This could be quite a lot of data. Is there a way to
handle this? I tried SavePageStateToPersistenceMedium but the
LoadPageState is not fired when going back so this doesn't work. And
the back button only works if I set Cacheability to NoCache.

If the page is redirected by me (which it is on a successful post)
then I store the info in a dataset Session variable and provide the
user with a Back button that restores the page using the Session
variable. But if the redirection is because of an error then i cannot
rely on the dataset (as this could be the cause of the error), but how
do I stop the user losing the data.

I could remove tha automatic redirection from the config file and put
in a global page_error handler that issued a javascript alert or just
showed the error on the page but this was a backup for unhandled
exceptions.

Any help appreciated.
Phil

[Aidy]

Surely those settings are only for unhandled exceptions? If there is a
chance your code will throw an exception, just put it in a try/catch block
and handle the error as appropriate.

"phancey" <de**@2bytes.co.ukwrote in message
news:7c**********************************@60g2000h sy.googlegroups.com...

hi,

I've got an asp.net app. In case of unhandled exceptions, the
web.config is set up to redirect the user to an error page. If the
user then clicks the back button to retry, they have lost all the data
they entered. This could be quite a lot of data. Is there a way to
handle this? I tried SavePageStateToPersistenceMedium but the
LoadPageState is not fired when going back so this doesn't work. And
the back button only works if I set Cacheability to NoCache.

If the page is redirected by me (which it is on a successful post)
then I store the info in a dataset Session variable and provide the
user with a Back button that restores the page using the Session
variable. But if the redirection is because of an error then i cannot
rely on the dataset (as this could be the cause of the error), but how
do I stop the user losing the data.

I could remove tha automatic redirection from the config file and put
in a global page_error handler that issued a javascript alert or just
showed the error on the page but this was a backup for unhandled
exceptions.

Any help appreciated.
Phil