OK, I've had enough.
You aren't using a mobile phone. Have the courtesy to type "you are" rather than "u r".
Kindly explain what your project is, that you need to turn on 100 valves at once. If they all need to be turned on at once, why cannot you use a single pin and connect all of the solenoids to it?
This page shows how you can use shift registers to turn on or off 32 LEDs (not Arduino shift registers, just shift registers).
You could extend that with some more chips to turn on or off many more things.
But please post proper sentences, with punctuation, capitals at the start of sentences, and give up on the mobile phone abbreviations, or I will lock the thread.