how can i view purchase history on my pc? i tried itunes but no luck any help?

Open iTunes, log into your account. Click on Purchased and you should see your purchases. There is also a way to click on all the different categories of purchases.

It's done via the Store > View Account menu option on your computer's iTunes (if the drop-down menus aren't showing then try control-B to get them to show), or (on the current iTunes) you can access it by clicking on your name/icon towards the top right of the iTunes screen and then clicking Account Info on the popup :

There should be a 'purchased' section on your account's details screen

This is helpful but what if you dont have a mac

You access your account in iTunes on your Windows computer as well. From iTunes, go to Account>Log into my Account.