Here I guess 'ASPNET.mdf'  is a database file.So it is very 
simple to add the database to your project by the fllowing 
navigation ( try navigation may not be same but the process 
is correct): 
right click on server Explorer and select add a databse ---
> select 
the mdf file browse option in the next screens. go the 
directory and select 'ASPNET.mdf' click finish. now the 
Database gets tagged to the project you added.

Thank you.

I guess       1.Restore the database

Copy file.mdf and file.ldf files from database directory 
 

And paste under the C:\Program Files\Microsoft SQL 
Server\MSSQL.1\MSSQL\Data
 
Open sql server management studio

Server name = u r system name
Login --- sa (default user)
Password = (whatever u r given while installing sql server)

Right click on database --- select --- attach

Click on Add button
Select Techno.mdf file
 
Click --- Ok – ok to finish

Now u will find the database