I have 1 ModalPopupExtender inside a UserControl. Everything works great until I start adding the same usercontrol to the page. I am getting this error message in the javascript console::
Message: Sys.InvalidOperationException: Two components with the same id 'MPE1' can't be added to the application.
I understand the error, it obvious that the framework wants unique IDs. What I can't figure out is how to give them unique name. Thanks in advance for any help.
Hey,
Are you using .NET 4 with a ClientIDMode of static? That would cause the issue, though with the default or a predictive option, this should work... check the client footprint, to see if all of the ID's are MPE1 or how that's being done. It should be uc1_MPE1. If you have two UC's with the same ID (or null ID), that would cause the issue.
HTH.
Brian, thanks but this is in .NET 2.0.
The simple way to solve this is to just remove the tag "BehaviorID". That is the option I am going with now, I just hope in the future I won't have to use JS to call any of the popups.