.net中如何使用cookie

比如建立一个名为aspcn，值为灌水小鱼的cookie

HttpCookie cookie = new HttpCookie["aspcn"];
cookie.Value = "灌水小鱼";
Response.AppendCookie(cookie);

取出Cookie值也很简单

HttpCookie cookie = Request.Cookies["aspcn"];
cookieValue = cookie.Value;

在一个Cookie中储存多个信息，那也没有问题。比如在名为aspcn的cookie下加多个信息

HttpCookie cookie = new HttpCookie("aspcn");
cookie.Values.Add("webmaster","灌水小鱼");
cookie.Values.Add("writer","beige");
cookie.Values.Add("LinkColor","blue");
Response.AppendCookie(cookie);

取出信息也一样简单

HttpCookie cookie = Request.Cookies["aspcn"];
value1 = cookies.Values["webmaster"];
value2 = cookies.Values["writer"];

HttpCookie cookie = Request.Cookies[strKey]; 
if(null == cookie) 
{ 
//cookie不存在 
} 
先看看有没有写入客户端 



cookie=new HttpCookie("www.xx.org"); 
cookie.Values.Add("UserType", ddlLoginType.SelectedItem.Value); 
cookie.Values.Add("UserName", tbUserName.Text.Trim()); 
cookie.Values.Add("Password", tbPassword.Text.Trim()); 
cookie.Values.Add("Access",i.ToString()); 
Response.AppendCookie(cookie); 
//检查COOKIE是否已经写入浏览器 
cookie = Request.Cookies["www.xx.org"]; 
if(cookie==null||cookie.ToString()=="") 
{ 
//用session存储 
LoginUser loginUser = new LoginUser(); 
loginUser.UserName = tbUserName.Text.Trim(); 
loginUser.Password = tbPassword.Text.Trim(); 
loginUser.UserType = ddlLoginType.SelectedItem.Value; 
loginUser.Access = i; 
Session["www.xx.org"] = loginUser; 
} 

我以前的代码，没有问题的 




>>>页面仅仅是刷新了一次 

if you debug, does the code get executed at all? by the way, are you doing any validation? 

>>>然后是删除 

>>>Response.Cookies.Remove("MyCookie"); 
>>>Response.Redirect("....") // 转向  

>>>然后是删除 

HttpCookie cookie = Request.Cookies["myinfo"];
        if (cookie != null)
        {
            cookie.Expires = System.DateTime.Now.AddDays(-1);
        }
        Response.Cookies.Add(cookie);

Response.Cookies["LoginCode"].Expires =DateTime.Now.AddHours(1);
这是有效期为1小时，同样的方法可以类推成几分钟，几秒等等。