Hi,
I am using Ajaxcontrol toolkit in my application.I have a gridview with edit button on it.On clicking the edit button a modal popup is shown with gridview items on it.It is successfully displaying in vs2008 but when i converted the application to vs2012 i am getting the following error
0x800a139e - Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
How can i solve this issue??
