根据复选框的Checked属性

Question

我有Checkbox在Checked时放置一个Cookie。当选中Checkbox时，cookie会存储值“Like”，如果未选中该复选框，则会存储值“Dislike”。但是，选中复选框会存储值“Like”但取消选中它不存储“Dislike”，这是因为当cookie中的值为“Like”时，页面加载应将复选框设置为true当值为“不喜欢”时，false。

    protected void Page_Load(object sender, EventArgs e)
    {
        string coursename = Request.QueryString["coursename"].ToString();
        HttpCookie recivedCookie = Request.Cookies[User.Identity.Name + coursename + "LikeCookie"];
        if (Request.Cookies[User.Identity.Name + coursename + "LikeCookie"] != null)
        {
            if (recivedCookie.Values["UserLike"] == "Like")
            {
                LikeCheckBox.Checked = true;
            }
            else if (recivedCookie.Values["UserLike"] == "Dislike")
            {
                LikeCheckBox.Checked = false;
            }
        }
        else
        {
            Response.Write("Cookie is null");
        }
    }
//===================================================
    protected void LikeCheckBox_SelectedIndexChanged(object sender, EventArgs e)
    {
        string coursename = Request.QueryString["coursename"].ToString();
        CheckBox thisCheckBox = sender as CheckBox;
        Request.Cookies.Remove(User.Identity.Name + coursename + "LikeCookie");   // To remove the old cookie and create a new cookie whenever the checkbox's index changed
        HttpCookie cookie = new HttpCookie(User.Identity.Name + coursename + "LikeCookie");
        cookie.Expires.AddDays(10);
        if (cookie.Values["UserLike"] == null)
        {
            if (thisCheckBox.Checked)
            {
                cookie.Values.Add("UserLike", "Like");
            }
            else
            {
                cookie.Values.Add("UserLike", "Dislike");
            }
            Response.Cookies.Add(cookie);
        }
    }