I want to create a flavour management of products, ie create, delete, update flavour and apply to products. For exemple one product can have several flavour like chocolate, strawberry.
I want to know what is the best solution to create this in the admin panel ? I think itt's in the source code ? Have you tutorial for this ?
if I understand you correctly you need to create a product variant attribute. See how it's done to the product http://demo.nopcommerce.com/50s-rockabilly-polka-dot-top-jr-plus-size in the admin area => catalog => products => manage products => find this product
I want to do like manufacturers for exemple, ie create flavour, delete them and edit them, and so add these to product. I want a menu to create them with a list to display them.
The admin can click to menu "Flavour" and can create new flavour or delete it, and when he creates a product he can choose one or more different flavours.