When to use Request.Cookies over Response.Cookies?

Question

Do I use response when at a page event (e.g. load) as this is a response from ASP.NET, and request when pressing a button as this is a response going to ASP.NET for processing? Or is there more to it?

Answer 1

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.

Answer 2

In a web application the request is what comes from the browser and the response is what the server sends back. When validating cookies or cookie data from the browser you should use the Request.Cookies. When you are constructing cookies to be sent to the browser you need to add them to Response.Cookies.