I'm very new to Asp.Net. I've come across handling ModalPopupExtenders with UpdatePanels and forcing ModalPopupExtender.Show() on to keep the modal window open previously. But I've only experienced it where the contents of the model popup have been coded within the same aspx form so far.
Now Im trying to cope with a modal popup extender with an IFrame that sources/parents another form. I've worked out how to keep the modal popup showing the IFrame, but the contents of the IFrame vanish immediately the popup pops up.
Is anybody able to help please?
(I've been using Rahman Masadur's very helpful article and "Expanse example" code so far at http://www.codeproject.com/Articles/34996/ASP-NET-AJAX-Control-Toolkit-ModalPopupExtender-Co and it's confused me because although he's been using ModalPopupExtenders his code seems so clean of update panels and he's done the same as me for using a 2nd form in an IFrame but his doesn't disappear)