关于asp.net c#中对cookie的操作

下面是写cookie
1 HttpCookie cookie = new HttpCookie("Info");//定义cookie对象以及名为Info的项
2 DateTime dt = DateTime.Now;//定义时间对象
3 TimeSpan ts=new TimeSpan(1,0,0,0);//cookie有效作用时间，具体查msdn
4 cookie.Expires = dt.Add(ts);//添加作用时间
5 cookie.Values.Add("user","cxbkkk");//增加属性
6 cookie.Values.Add("userid","1203");
7 Response.AppendCookie(cookie);//确定写入cookie中        读取cookie
 1 if(Request.Cookies["Info"]!=null)
 2 {
 3     string temp=Convert.ToString(Request.Cookies["Info"].Values["user"])+"  "+Convert.ToString(Request.Cookies["Info"].Values["userid"]);
 4     //读全部就用Request.Cookies["Info"].Value)
 5     if(temp=="")
 6     {
 7         Response.Write("空");
 8     }
 9     else
10         Response.Write(temp);
11 }
12 else
13 {
14     Response.Write("error");
15 }        修改cookie
1 Response.Cookies["Info"]["user"] = "2";
2 Response.Cookies["Info"].Expires = DateTime.Now.AddDays(1);        删除cookie下的属性
1 HttpCookie acookie=Request.Cookies["Info"];
2 acookie.Values.Remove("userid");
3 acookie.Expires = DateTime.Now.AddDays(1);
4 Response.Cookies.Add(acookie);        删除所有cookie，就是设置过期时间为现在就行了
1 int limit=Request.Cookies.Count - 1;
2 for(int i=0;i<limit;i++)
3 {
4     acookie = Request.Cookies(i)
5     acookie.Expires = DateTime.Now.AddDays(-1)
6     Response.Cookies.Add(acookie)
7 }