Hi
I am getting this error in one of my webpage if I run my website in .Net 4.0 but it is working fine in 3.5 Framework.
I have inherited from a Master Page and has a user control and AjaxToolkit in this page, any help in fixing this solution would help me.
Sys.WebForms.PageRequestManagerServerErrorException: An error has occurred because a control with id 'ctl00$ContentPlaceHolderTabs$gvGridView$ctl03$ctl01' could not be located or a different control is assigned to the same ID after postback. If the ID is not assigned, explicitly set the ID property of controls that raise postback events to avoid this error.
Thanks in Advance
Arun
...
Go to the complete details ...