Storing multiple values in cookies

Question

I have very large website which uses a lot of cookies. There are approx. 14 different cookies are there. I have different cookies for each item. When a user surfs the site t

Answer 1

Modifying and Deleting Cookies: You cannot directly modify a cookie. Instead, changing a cookie consists of creating a new cookie with new values and then sending the cookie to the browser to overwrite the old version on the client.

Answer 2

Matthew beat me to it, but yes, see the ASP.NET Cookies Overview...

To write and read a single cookie with multiple key/values, it would look something like this:

HttpCookie cookie = new HttpCookie("mybigcookie");
cookie.Values.Add("name", name);
cookie.Values.Add("address", address);

//get the values out
string name = Request.Cookies["mybigcookie"]["name"];
string address = Request.Cookies["mybigcookie"]["address"];

Answer 3

There is a section in the ASP.NET Cookies Overview that discusses how to implement multiple name-value pairs (called subkeys) in a single cookie. I think this is what you mean.

The example from that page, in C#:

Response.Cookies["userInfo"]["userName"] = "patrick"; //userInfo is the cookie, userName is the subkey
Response.Cookies["userInfo"]["lastVisit"] = DateTime.Now.ToString(); //now lastVisit is the subkey
Response.Cookies["userInfo"].Expires = DateTime.Now.AddDays(1);

HttpCookie aCookie = new HttpCookie("userInfo");
aCookie.Values["userName"] = "patrick";
aCookie.Values["lastVisit"] = DateTime.Now.ToString();
aCookie.Expires = DateTime.Now.AddDays(1);
Response.Cookies.Add(aCookie);

EDIT: From the Cookies Overview (emphasis added):

Modifying and Deleting Cookies: You cannot directly modify a cookie. Instead, changing a cookie consists of creating a new cookie with new values and then sending the cookie to the browser to overwrite the old version on the client.