c# - Unable to retrieve metadata - MVC application

Question

I was following this to create a simple MVC application. After creating the model, when I tried to add controller, I got the following error :

Unable to retrieve metadata for "MvcApplication.Models.Movie". Invalid value for key "attachdbfilename".

Can someone tell why I am getting this error.

Update : I saw this wherein solution is provided by changing the providerName. But in my case it is already System.Data.SqlClient. Following are my connectionStrings :

<connectionStrings>
    <add name="DefaultConnection" connectionString="Data Source=.SQLEXPRESS;Initial Catalog=aspnet-MvcApplication-20130708120940;Integrated Security=SSPI" providerName="System.Data.SqlClient" />
    <add name="MovieDBContext" connectionString="Data Source=(LocalDB)v11.0;AttachDbFilename=|DataDirectory|Movies.mdf;Integrated Security=True" providerName="System.Data.SqlClient" />
  </connectionStrings>

Answer 1

The error message is saying invalid value for AttachDbFilename which is part of your MovieDbContext connection string.

The connection string currently shows this AttachDbFilename=|DataDirectory|Movies.mdf so it appears the mdf file is now missing from the App_Data folder.