Sorry for a delay, there is no built-in eCommerce functionality inside the MonoX, so you will need to develop this by your self. Best approach would be to take a look at some other eCommerce solutions and see how they work then down size the scope and start working on it.
I'd suggest the following
- Add all the lookup tables you need (Companies, Products, etc.)
- Generate LLBLGen DAL that includes these lookup tables (if you are going to use LLBLGen then you need to use their
ORM Desinger)
- Now you need to build few data entry screens for these tables
- Now you have all the prerequisites for product comparison and now you need to build few WebParts that will be used to as front-end modules
Take a look at the following articles for more information
Building a custom ASP.NET project based on MonoX
Building a custom Web part
Note: eCommerce solution is far more complex than this, so we can't provide you the whole solution. You will need to start from somewhere and then we can kick in and help you for some specific problems.
Regards