ASP.NET 4 Unleashed

Working with Multivalued Cookies

According to the cookie specifications, browsers should not store more than 20 cookies from a single domain. You can work around this limitation by creating multivalued cookies.

A multivalued cookie is a single cookie that contains subkeys. You can create as many subkeys as you need.

For example, the page in Listing 28.7 creates a multivalued cookie named preferences. The preferences cookie stores a first name, last name, and favorite color (see Figure 28.3).

Figure 28.3. Creating a multivalued cookie.

Listing 28.7. SetCookieValues.aspx

When you submit the page in Listing 28.7, the following HTTP header is ...