Catch NetUI Error

Question

Hi There,
There's been previous posts about the NetUI Warning/Error 'unable to update expression....'
but is there a way you can catch this error and deal with it?
Example, the form expects an int, the user enters a string. This produces the
error above but you can't check for it in the validation in the form bean because
it has already reverted to 0.
Can you trap this error in the validation?
Thanks in Advance,
Alex.

Answer 1

Thanks for your help John.
John Rohrlich <[email protected]> wrote:
I should have said "if the input can not be converted to an int" as all
input from the jsp form will be strings when passed to the server.
Here are some references on validation
http://dev2dev.bea.com/codelibrary/code/pf_formvalid.jsp
http://edocs.bea.com/workshop/docs81/doc/en/workshop/guide/netui/guide/conValidatingUserInput.html
John Rohrlich wrote:
Alex,
A good approach here is to add validation to your form class and addan
ActionError if the input is not an int. You won't get the error andyou
can display a message to the user.
john
Alex Cave wrote:
Hi There,
There's been previous posts about the NetUI Warning/Error 'unable
to
update expression....'
but is there a way you can catch this error and deal with it?
Example, the form expects an int, the user enters a string. This
produces the
error above but you can't check for it in the validation in the form
bean because
it has already reverted to 0.
Can you trap this error in the validation?
Thanks in Advance,
Alex.