Can't connect to database from file

Question

I try to connect through: Microsoft SQL Server Database File (SqlClient), but I recieve error:

The attempt to attach to the database failed with the f

Answer 1

You need the SQL Server Express LocalDB add-on, you can get it from here in both x86 & amd64 versions.

Answer 2

I had faced same issue when I deployed my software on test machine.
Solution:

1. Check the SQL server version using which the .mdf was build. If you don't know execute command SELECT @@VERSION.
2. Install correct version of SqlLocalDB.msi from following link.
   http://www.microsoft.com/en-us/download/details.aspx?id=29062 http://www.microsoft.com/en-my/download/details.aspx?id=42299.

Answer 3

Try to use SQL Server Authentication. Make sure that your SQL service is running or not. I think this will help you.