cookie判断,该如何处理_ASP.NET

cookie判断

C# code

protected void Page_Load(object sender, EventArgs e)    {        if (!IsPostBack)        {            HttpCookie cookie = Request.Cookies["userSName"];            if (cookie != null )            {                               Response.Write(cookie + "  ：1");            }            else            {                Response.Write(cookie +"  ：2");            }        }    }

我在IE8下输出的结果：System.Web.HttpCookie ：1
在 firefox下输出：System.Web.HttpCookie ：1

都清空了浏览器的缓存什么的

------解决方案--------------------------------------------------------

C# code

        HttpCookie cookie = new HttpCookie("UserName", "test");        Response.Cookies.Add(cookie);        HttpCookie ck = Request.Cookies["UserName"];        if (ck != null)        {            Response.Write(ck.Value + ":1");        }        else        {            Response.Write("cookie不存在");        }
------解决方案--------------------------------------------------------
IE清除缓存后需要关掉重新打开。