.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;
}