How to delete cookies on an ASP.NET website

Question

In my website when the user clicks on the \"Logout\" button, the Logout.aspx page loads with code Session.Clear().

In ASP.NET/C#, does this clear all co

Answer 1

Try something like that:

if (Request.Cookies["userId"] != null)
{
    Response.Cookies["userId"].Expires = DateTime.Now.AddDays(-1);   
}

But it also makes sense to use

Session.Abandon();

besides in many scenarios.

Answer 2

No, Cookies can be cleaned only by setting the Expiry date for each of them.

if (Request.Cookies["UserSettings"] != null)
{
    HttpCookie myCookie = new HttpCookie("UserSettings");
    myCookie.Expires = DateTime.Now.AddDays(-1d);
    Response.Cookies.Add(myCookie);
}

At the moment of Session.Clear():

• All the key-value pairs from Session collection are removed. Session_End event is not happen.

If you use this method during logout, you should also use the Session.Abandon method to Session_End event:

• Cookie with Session ID (if your application uses cookies for session id store, which is by default) is deleted

Answer 3

Response.Cookies["UserSettings"].Expires = DateTime.Now.AddDays(-1)

Answer 4

Unfortunately, for me, setting "Expires" did not always work. The cookie was unaffected.

This code did work for me:

HttpContext.Current.Session.Abandon();
HttpContext.Current.Response.Cookies.Add(new HttpCookie("ASP.NET_SessionId", ""));

where "ASP.NET_SessionId" is the name of the cookie. This does not really delete the cookie, but overrides it with a blank cookie, which was close enough for me.

Answer 5

Though this is an old thread, i thought if someone is still searching for solution in the future.

HttpCookie mycookie = new HttpCookie("aa");
mycookie.Expires = DateTime.Now.AddDays(-1d);
Response.Cookies.Add(mycookie1);

Thats what did the trick for me.