Server Error in '/' Application.
Control 'MainContent_gviewTest' of type 'GridView' must be placed inside a form tag with runat=server.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Web.HttpException: Control 'MainContent_gviewTest' of type 'GridView' must be placed inside a form tag with runat=server.