In vsexpress 2012 using asp.net. Made a login page. in that I am trying to enter user name and pass word I am getting the following error
The databas
Try to connect to server name "(localdb)\v11.0" check your web.config, it should mention the correct server instance used to create the MDF file
Version 706 is a database file from Sql Server 2012
Version 663 is a database file from Sql Server 2008R2 (post SP1 ?)
So it seems that you are trying to open an MDF file made with 2012 but the current instance of Sql Server is 2008R2. There is no way to work with that file in this situation.
You could: