asp.net - 注销时删除 cookie

Question

在主页的页面加载中，我设置了一个如下所示的 cookie:-

if (abc == true)
{
    HttpCookie cookie = new HttpCookie("Administrator");
    cookie.Value = "Admin";
    cookie.Expires = DateTime.Now.AddDays(-1);
    Response.SetCookie(cookie);
}

并将 cookie 用作:-

if (Request.Cookies["Administrator"] != null)
{
    if (Request.Cookies["Administrator"].Value == "Admin")
        //some code
}

注销时我希望此 cookie 过期或被删除。所以我写了:- Seesion.Abandon();

现在即使我注销后，当我重新登录主页时..Request.Cookies["Administrator"] 行仍然不为空。

奇怪...!请告知原因及解决办法。

Answer 1

来自MSDN DOCUMENTATION ,

You cannot directly delete a cookie on a user's computer. However, you can direct the user's browser to delete the cookie by setting the cookie's expiration date to a past date. The next time a user makes a request to a page within the domain or path that set the cookie, the browser will determine that the cookie has expired and remove it.

你可以这样做:

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