// 读取Cookie

   protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            if (Request.Cookies["cookie_name"] == null)//新建cookie
            {
                  addCookie("djk8888");//写cookie
            }
            else//读取cookie
            {
                HttpCookie cookies = Request.Cookies["cookie_name"];
                string myname = cookies.Values["name"];
            }
        }
    }

 

    //写cookie
    public void addCookie(string s)
    {
        HttpCookie cookies = new HttpCookie("cookie_name");
        cookies.Values.Add("name", s);

        cookies.Expires = System.DateTime.Now.AddMinutes(20);//设置过期时间
        Response.AppendCookie(cookies);//生成Cookie
    }

 

    //删除cookie

    public void deletAllCookie()
    {
        if (Request.Cookies["cookie_name"] != null)//新建cookie
        {
            HttpCookie cookies = new HttpCookie("cookie_name");
            cookies .Expires = DateTime.Now.AddDays(-1);
            Response.AppendCookie(cookies);//生成Cookie
        }
    }

 

//删除所有cookie   

 public void quit()
    {
        HttpCookie aCookie;
        string cookieName;
        int limit = Request.Cookies.Count;
        for (int i = 0; i < limit; i++)
        {
            cookieName = Request.Cookies[i].Name;
            aCookie = new HttpCookie(cookieName);
            aCookie.Expires = DateTime.Now.AddDays(-1);
            Response.Cookies.Add(aCookie);
        }
        Response.Write("<script>window.location.href=window.location.href;</script>");
    }