invalid value for key attachdbfilename mvc 4 - asp.net-mvc-4

Question

I'm doing a very basic MVC 4 project. I have a simple model and a dbcontext. I am trying to take input from a form and save it using the dbcontext.
Here's my codes,
In the controller
public ActionResult FormShow(Models.bullseye sampbe)
{
if (ModelState.IsValid)
{
var db = new bullseyeDataContext();
db.bullseyes.Add(sampbe);
db.SaveChanges();
return RedirectToAction("FormShow");
}
return FormShow();
}
In the dbcontext
public class bullseyeDataContext : DbContext
{
public DbSet<bullseye> bullseyes { get; set; }
static bullseyeDataContext()
{
Database.SetInitializer(new DropCreateDatabaseAlways<bullseyeDataContext>());
}
}
And the connectionstring is
<add name="MvcFourFirstTouch.Models.bullseyeDataContext"
connectionString="Data Source=(LocalDb)\v11.0;
Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\MvcFourFirstTouch.Models.bullseyeDataContext.mdf" providerName="System.Data.SqlClient" />
And when i submit the form i'm getting invalid value for key attachdbfilename. Where's the problem??

Answer 1

Updated
The problem is with your connection string. AttachDBFileName does not like the value you've specified to it. Could be an issue with the db name, or an issue with LocalDB, or the lack/presence of an extra \ in the paths.
However, if you have no explicit reason for using AttachDBFileName, then I would suggest replacing AttachDbFileName=[...].mdf with Initial Catalog=yourDBName. You avoid a lot if issues this way :)