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

Answer 1

Just change database name from web.config project level file and then update database.

connectionString = Data Source =(LocalDb)\MSSQLLocalDB;AttachDbFilename="|DataDirectory|\aspnet-Project name-20180413070506.mdf";Initial Catalog="aspnet--20180413070506";Integrated

Change the bold digit to some other number:

connectionString = Data Source==(LocalDb)\MSSQLLocalDB;AttachDbFilename="|DataDirectory|\aspnet-Project name-20180413070507.mdf";Initial Catalog="aspnet--20180413070507";Integrated