操作Cookies 的疑惑

Question

各位好，我想实现这样的一个功能，就是想记录用户浏览商品的记录。我想把用户浏览商品的ID 写到Cookies 里去，如是我做了个这样的测试。
protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            if (Request.Cookies["history"] == null)
            {
                HttpCookie hc = new HttpCookie("history");
                hc.Expires = DateTime.Now.AddDays(7);
                NameValueCollection nv = new NameValueCollection();
                nv.Add(DateTime.Now.ToString(), DBNull.Value.ToString());
                hc.Values.Add(nv);
                Response.Cookies.Add(hc);            }
            else
            {
                HttpCookie cc = Request.Cookies["history"];
                NameValueCollection nv2 = cc.Values;
                nv2.Add(DateTime.Now.ToString(), DBNull.Value.ToString());
                cc.Values.Add(nv2);
                Response.Cookies.Add(cc);
            }
            HttpCookie htk = Request.Cookies["history"];            for (int i = 0; i < htk.Values.AllKeys.Length; i++)
            {
                Response.Write(htk.Values.Keys[i].ToString() + "<br>");
            }        }
        
      
    }
为什么得不到多个KEY（时间）呢？只能得到当前的时间。

Answer 1

要创建cookie键
如Response.Cookies["userInfo"]["userName"] = "T";   

Answer 2

cookies的属性和方法应该多看看了 呵呵 楼上正解

Answer 3

NameValueCollection 里不是包含了键了吗？

Answer 4

cookie 的 values 里放的不是键值集合吗？

Answer 5

//-----------------------------载入
if(!IsPostBack)
        {             HttpCookie cookie = Request.Cookies["userinfo1"];
            cookie.Expires = System.DateTime.Now.AddMinutes(20);//设置过期时间
            for (int i = 0; i < 5; i++)
            {
                cookie.Values["BB" + i.ToString()] = i.ToString();
                Response.Cookies.Add(cookie);
            }
           
   }//**************写入
       HttpCookie cookie = new HttpCookie("userinfo1");
        cookie.Expires = System.DateTime.Now.AddMinutes(20);//设置过期时间
        for (int i = 0; i < 10; i++)
        {
            
            cookie.Values["U" +i.ToString()] = i.ToString();           
            Response.Cookies.Add(cookie);
        }
//**************---------------读取
        //读取 Cookie 集合
        for (int i = 0; i < Request.Cookies.Count; i++)
        {
            if (Request.Cookies.AllKeys[i] == "userinfo1")
            {                HttpCookie cookies = Request.Cookies["userInfo1"];
                Response.Write("name=" + cookies.Name + "<br/>");
                //Response.Write("name=" + cookies.Value + "<br/>");                if (cookies.HasKeys)//是否有子键
                {
                    System.Collections.Specialized.NameValueCollection NameColl = cookies.Values;
                    for (int j = 0; j < NameColl.Count; j++)
                    {
                        
                        Response.Write("子键名=" + NameColl.AllKeys[j] + "<br/>");
                        Response.Write("子键值=" + NameColl[j] + "<br/>");
                    }                }
                else
                {
                    Response.Write("value=" + cookies.Value + "<br/>");
                }
            }
          
        }
//***********************删除
HttpCookie acookie = Request.Cookies["userinfo1"];
        acookie.Expires = System.DateTime.Now.AddMinutes(20);//设置过期时间       
        if (acookie.HasKeys)//是否有子键
        {
            System.Collections.Specialized.NameValueCollection NameColl = acookie.Values; 
            for (int j = 0 ; j < NameColl.Count; j++)
            {                
                if (NameColl.AllKeys[j] == "U8")
                {
                    acookie.Values.Remove(NameColl.AllKeys[j]);
                    Response.Cookies.Add(acookie);
                }               
            }    
        }
//***************************追加
HttpCookie cookie = Request.Cookies["userinfo1"];
        cookie.Expires = System.DateTime.Now.AddMinutes(20);//设置过期时间
        for (int i = 0; i < 5; i++)
        {
            cookie.Values["K" + i.ToString()] = i.ToString();
            Response.Cookies.Add(cookie);
        }

Answer 6

//-----------------------------载入
if(!IsPostBack)
        {             HttpCookie cookie = Request.Cookies["userinfo1"];
            cookie.Expires = System.DateTime.Now.AddMinutes(20);//设置过期时间
            for (int i = 0; i < 5; i++)
            {
                cookie.Values["BB" + i.ToString()] = i.ToString();
                Response.Cookies.Add(cookie);
            }
           
   }//**************写入
       HttpCookie cookie = new HttpCookie("userinfo1");
        cookie.Expires = System.DateTime.Now.AddMinutes(20);//设置过期时间
        for (int i = 0; i < 10; i++)
        {
            
            cookie.Values["U" +i.ToString()] = i.ToString();           
            Response.Cookies.Add(cookie);
        }
//**************---------------读取
        //读取 Cookie 集合
        for (int i = 0; i < Request.Cookies.Count; i++)
        {
            if (Request.Cookies.AllKeys[i] == "userinfo1")
            {                HttpCookie cookies = Request.Cookies["userInfo1"];
                Response.Write("name=" + cookies.Name + "<br/>");
                //Response.Write("name=" + cookies.Value + "<br/>");                if (cookies.HasKeys)//是否有子键
                {
                    System.Collections.Specialized.NameValueCollection NameColl = cookies.Values;
                    for (int j = 0; j < NameColl.Count; j++)
                    {
                        
                        Response.Write("子键名=" + NameColl.AllKeys[j] + "<br/>");
                        Response.Write("子键值=" + NameColl[j] + "<br/>");
                    }                }
                else
                {
                    Response.Write("value=" + cookies.Value + "<br/>");
                }
            }
          
        }
//***********************删除
HttpCookie acookie = Request.Cookies["userinfo1"];
        acookie.Expires = System.DateTime.Now.AddMinutes(20);//设置过期时间       
        if (acookie.HasKeys)//是否有子键
        {
            System.Collections.Specialized.NameValueCollection NameColl = acookie.Values; 
            for (int j = 0 ; j < NameColl.Count; j++)
            {                
                if (NameColl.AllKeys[j] == "U8")
                {
                    acookie.Values.Remove(NameColl.AllKeys[j]);
                    Response.Cookies.Add(acookie);
                }               
            }    
        }
//***************************追加
HttpCookie cookie = Request.Cookies["userinfo1"];
        cookie.Expires = System.DateTime.Now.AddMinutes(20);//设置过期时间
        for (int i = 0; i < 5; i++)
        {
            cookie.Values["K" + i.ToString()] = i.ToString();
            Response.Cookies.Add(cookie);
        }

Answer 7

我知道我错哪啦！
else
            {
                HttpCookie cc = Request.Cookies["history"];
                NameValueCollection nv2 = cc.Values;
                nv2.Add(DateTime.Now.ToString(), DBNull.Value.ToString());
                cc.Values.Add(nv2);
                Response.Cookies.Add(cc);
            }没有给cc 设置 Expries 

Answer 8

Response.Cookies["userInfo"]["userName"] = "T";  

Answer 9

Response.Cookies["userInfo"]["userName"] = "T";