Some great advice for all SQL server user

Hii!!
Don't be panic, If your MDF file is corrupted due to any reason so I think you need to use a third party tool to recover a MDF file.I would recommend you to use MDF repair tools as it is highly trustable with your data which can easily retrieve data without loss of any information.
SysTools SQL Recovery

Recovers the overall existing SQL database objects like Table, Triggers, Stored Procedure, Views, Rules and XML data types also. The software is well capable to recover the XML data file which are human readable, making it easy to understand how data is interpreted during bulk operations and support with all kind of MS SQL server versions. Read more :-

As per my knowledge RecoveryFix for SQL database recovery software is good. You can try this software to recover your lost data from SQL server. For more details about this software: http://www.sqlrecovery.org and also read this post http://recoverymaster.livejournal.com/519.html

You should try some MDF file recovery tool if the file is corrupt.