Sort & Filter on Headers

DVWP offers a tiny feature that can be very useful to the user – “Sort & Filter on Headers”. As same as the OOTB lists and libraries, which their headers offers filtering and sorting columns, it can be added to your data view by simple click:

Under Data View Tools, Design Tab - Mark the “Sort & Filter on Headers” check box:

And now you have this feature activated, displayed like this:

 

Important! This feature doesn’t support CAML Query in the DataSource tag (such as queries and CrossList mode).