.net - Cannot attach the file *.mdf as database

Question

Basically I've followed a tutorial and decided to delete the .mdf file afterwards.

Now whenever I try to run the application I get the following error (the title of this thread). The code where I get the error is shown below (ASP.NET MVC 4):

OdeToFoodDB db = new OdeToFoodDB();

public ActionResult Index()
{
    var model = db.Restaurants.ToList();
    return View(model);
}

My connection string is the following:

<add name="DefaultConnection" 
     connectionString="Data Source=(LocalDb)v11.0;Initial Catalog=OdeToFoodDb;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|OdeToFoodDb.mdf" 
     providerName="System.Data.SqlClient" />

I've tried looking at the SQL Server Object Explorer but it looks the following:

Also, in Server Explorer I don't see any data connections.

And when I try to add a new connection in Server Explorer I don't see any databases named OdeToFoodDb.

Sorry for this wide question but I'm new to Entity Framework and don't quite get what's wrong here.

Answer 1

I think that for SQL Server Local Db you shouldn't use the Initial Catalog property. I suggest to use:

<add name="DefaultConnection" 
     connectionString="Data Source=(LocalDb)v11.0;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|OdeToFoodDb.mdf" 
     providerName="System.Data.SqlClient" />

I think that local db doesn't support multiple database on the same mdf file so specify an initial catalog is not supported (or not well supported and I have some strange errors).