Add controller error unable to retrieve metadata

Question

I want to add controller in my MVC 4 application in VS2012 as this image:

Model:

Answer 1

Don't forget to clean and rebuild before you try to scaffold! That was my mistake.

Answer 2

I had the same issue and below is the change which fixed the issue for me. Had to change localhost to . And Added Initial catalog=Movies.

Before

<add name="MovieDBContext" connectionString="Data Source= localhost\SQLEXPRESS;AttachDbFilename=|DataDirectory|\MoviesDB.mdf;Integrated Security=True" providerName="System.Data.SqlClient"/>

After (fix)

<add name="MovieDBContext" connectionString="Data Source= .\SQLEXPRESS;Initial Catalog=Movies; AttachDbFilename=|DataDirectory|\MoviesDB.mdf;Integrated Security=True" providerName="System.Data.SqlClient"/>

Reference:

ASP .Net MVC 4, Invalid value for key 'attachdbfilename'

Answer 3

My post may help in case someone has the same problem.

I tried experimenting with EF6 and EF5 in the same project, and I noticed that the <entityFramework> tag was messed up, and got the same problem above.

Here is what I did, and it solved the problem:

1. I removed the <entityFramework> tag from Web.config
2. Uninstalled entity framework from my MVC app using nuget
3. Installed entity framework to my MVC app again

After removing the <entityFramework> tag and re-installing EF5 it was fixed, and I can scaffold my controllers again.

Answer 4

In web.config, delete the AttachDBFilename=|DataDirectory|****.mdf line.

Answer 5

Change providerName="System.Data.SqlServerCe.4.0 to providerName="System.Data.SqlClient to fix this error.

Answer 6

In Web.config, set second providerName same as first providerName, and after creating controller, undo that!

from:here