Asp.net webpage design

I have a e-commerce website template I am working on using HTML and Asp.Net in Visual Studio. I have most of the template,and db schema ready. I was working on writing the code to connect the login and registration form to the database, I keep on getting parsing error. So here is what I need to add to the template I have. 1. edit the code for User Registration and Login to make it work and start a login session. 2. on the product listing page, load the products in the database according to category selected by the user. 3. Add a shopping cart feature, and if the user buys something, make updates in the database accordingly. 4. Search feature to search for the products listed in the website. The website doesnt need to have a real credit card authentication system. It is just a dummy website that I need for my project.