Cookie and serialisation

Question

User-1473429353 posted

Hi,

I'm making a car purchasing website just for practice and have to make an add to cart feature using cookies. I want to set the car id as the cookie in the add to cart button but then in the cart.aspx.cs I want to use this id cookie to get the details related to the car from the database (image, make, model, colour and price). 

I have this code on my product page for the add to stock button which my manager helped me with:

        protected void AddToCartBtn_Click(object sender, EventArgs e)
        {

            HttpCookie cookie = new HttpCookie("ShoppingCart");
            cookie["ID"] = Newtonsoft.Json.JsonConvert.SerializeObject(cookie);
            cookie.Expires = DateTime.Now.AddDays(30);
            Response.Cookies.Add(cookie);
            Response.Redirect("Cart.aspx");

        }

I am not sure if this is right and I also don't know what to add to the cart.aspx.cs to get the data from the database using the cookie and save them in my labels. If someone could make this a bit clearer for me to understand that would be great.

Answer 1

User475983607 posted

Typically, the ID is passed in the URL.  Also, if this is a learning exercise you should use a modern framework like MVC or Razor Pages.

Answer 2

User-1473429353 posted

It's a learning exercise but the company want me to use asp.net c# web forms, can't use anything else 

Answer 3

User475983607 posted

Your original code does not make sense.  If you already have a cookie with the ID then why are you creating another cookie with the same information.  Just read the cookie in Cart.aspx.

Anyway, a common method passing an ID in the URL.

Response.Redirect("Cart.aspx?id=" + theId.ToString());

Then in the Cart.aspx page get the ID.

string ID = Request["ID"]