一般处理程序中的cookies问题

Question

   在一般处理程序中   为什么要调用两次DelCookies方法才能删除掉啊  感觉是cookies的问题 public void DelCookies(HttpContext context)
    {
        if (context.Request.Cookies["restoreid"] != null)
        {
            HttpCookie tempCurBuyerList = context.Request.Cookies["restoreid"];
            string[] strArr = tempCurBuyerList.Value.Split(',');
            System.Collections.ArrayList al = new System.Collections.ArrayList(strArr);
            al.Remove(context.Request["Vid"]);            HttpCookie cookie = new HttpCookie("restoreid"); //设置cookies到期时间
            cookie.Expires = DateTime.Now.AddDays(-2);
            context.Response.Cookies.Add(cookie);
            
           // context.Request.Cookies.Remove("restoreid");
            for (int i = 0; i < al.Count; i++)
            {//循环添加没有被删除的cookies
                HistoryRestore("restoreid", Int32.Parse(al[i].ToString()));
            }
            context.Response.Write(getHist());
        }
        else {
            context.Response.Write("暂无浏览记录");
        }
    }    public string getHist()
    {
        HttpRequest Request = HttpContext.Current.Request;
        string temp = "";
        if (GetLastProducts().Count != 0)
        {
            for (int i = 0; i < GetLastProducts().Count; i += 12)
            {
                temp += "<li><span><a href='?VideoId=" + GetLastProducts()[i] + "&Re=1'>" + GetLastProducts()[i + 1] + "</a></span><a href='?VideoId=" + GetLastProducts()[i] + "&Re=1'>继续观看</a><input title='删除' type='button' value='X' onclick='Delcookies(" + GetLastProducts()[i] + ")' ></li>";
            }
        }
        else
        {
            temp = "暂无浏览记录";
        }
        return temp;
    }    public List<string> GetLastProducts()
    {
        HttpRequest Request = HttpContext.Current.Request;
        System.Collections.ArrayList lists = new System.Collections.ArrayList();
        List<string> list = null;
        if (Request.Cookies["restoreid"] != null)
        {
            HttpCookie tempCurBuyerList = Request.Cookies["restoreid"];
            string[] strArr = tempCurBuyerList.Value.Split(',');
            list = new List<string>();
            for (int j = 0; j < strArr.Length; j++)
            {
                list.AddRange(new Video().search_voide(strArr[j], 1, 1, 1));
            }
        }
        return list;
    }

Answer 1

HttpCookie cookie = new HttpCookie("restoreid"); //设置cookies到期时间
cookie.Expires = DateTime.Now.AddDays(-2);
context.Response.Cookies.Add(cookie);
context.Request.Cookies.Remove("xxx");