"Dracula III:The Legacy"(2005)? Starring Jason Scott Lee and Rutger Hauer as Dracula. It had a woman becoming a vampire and helping the heroes, also I remember the main hero becoming a vampire and trying to resist it. Here is the IMDB page.

http://www.imdb.com/title/tt0303929/?ref_=nv_sr_1

Could this be Dracula III: The Legacy from 2005?

It starred Jason Scott Lee and Rutger Hauer as Dracula and had a woman becoming a vampire and helping the heroes.

I remember the main hero becoming a vampire and trying to resist it.