This film is just awful. I couldn't manage more than 40 minutes, before giving up. All the subtlety of the book has been taken away. In the book, one of the most interesting things about Dorian Gray is that he gradually gets drawn into a debauched life, by the persuasion of his friend Henry. In the beginning he is really rather naive and at times guilt stricken.
In this film, he is a sex monster from the outset. He makes love with Sybil Vane (not in the book), he goes to brothels right from the beginning (in the book only later on). He has sex with a mother and daughter in the same room, in a totally preposterous and unbelievable manner (not in the book). He has gay sex with Basil the painter (also not in the book). Why all the sex scenes? They aren't in the book, and actually make the naive Dorian of the book into a far less interesting character.
The whole episode with Sybil Vane, which in the book is exceedingly tense, and at the end comes back to haunt Dorian, is glossed over (in my opinion) in an unacceptable manner.
The book is a brilliant description of its times, and sets out an interesting moral dilemma - what the real consequences are of the kind of life that Dorian is leading. It also sets out a moral conflict between desire (in the book not always sexual) and the consequences of that desire.
Forget this film. Read the book.