Recover SQL server database

Question

I am using SQL server 2008 R2, my server has crashed and lost all of the data. I managed to recover the mdf file of database but getting below error message:

 

Error: 5172, Severity: 16, State: 15.

The header for file 'C:\Program Files\Microsoft SQL Server\MSSQL\DATA\mydatabasename.mdf' is not a valid database file header.

 

Is there any way to resolve this error message?

Thanks in advanced