When to use Request.Cookies over Response.Cookies?

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They are 2 different things, one SAVES [Response], the other READS [Request]

in a Cookie (informatics speaking) 🙂
you save a small file for a period of time that contains an object of the type string

in the .NET framework you save a cookie doing:

HttpCookie myCookie = new HttpCookie("MyTestCookie");
DateTime now = DateTime.Now;

// Set the cookie value.
myCookie.Value = now.ToString();
// Set the cookie expiration date.
myCookie.Expires = now.AddMinutes(1);

// Add the cookie.
Response.Cookies.Add(myCookie);

Response.Write("<p> The cookie has been written.");

You wrote a cookie that will be available for one minute… normally we do now.AddMonth(1) so you can save a cookie for one entire month.

To retrieve a cookie, you use the Request (you are Requesting), like:

HttpCookie myCookie = Request.Cookies["MyTestCookie"];

// Read the cookie information and display it.
if (myCookie != null)
   Response.Write("<p>"+ myCookie.Name + "<p>"+ myCookie.Value);
else
   Response.Write("not found");

Remember:

To Delete a Cookie, there is no direct code, the trick is to Save the same Cookie Name with an Expiration date that already passed, for example, now.AddMinutes(-1)

this will delete the cookie.

As you can see, every time that the time of life of the cookie expires, that file is deleted from the system automatically.

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