The hair issues continue... ?

I have an oily scalp and dry ends. Recently I changed my shampoo, and now my scalp is better and my hair even looks more volumised. The problem is that now i have dandruff. does this mean I have to change the shampoo or is there something I can do? I'v gone through different shampoos and by far this one makes my hair look freshest except for the dandfuff.