Question

Is there a good way to exclude some errors from being redirected to the default custom error page?

I’m using aspnet membership provider and have just discovered that if for example a user tries to change their email address to one that is already in the system, rather than show the error message warning in the style of a validation error as was designed, since I turned on custom errors, it just redirects to the standard error page.

Do I need to specifically exclude error codes for this problem?

Here is the custom error section in the web config:

<customErrors mode="On" defaultRedirect="/Error/Error500" />

Thanks very much

Answer 1

You need to stop the exception bubbling up in this case, and implement some validation to check if the email address exists.

Your call to CreateUser should return a MembershipCreateStatus as an error code.

 MembershipCreateStatus.DuplicateEmail

See here for more error codes.