//以一维的形式记录Cookie
Response.Cookies["userid"].Value = user.Id.ToString();
//Cookie失效期限为一个月
Response.Cookies["userid"].Expires = DateTime.Now.AddDays(30);
//设置域名
Response.Cookies["userid"].Domain = "xxx.com";
//获取Cookie
Request.Cookie["userid"].Value


//以二维的形式记录Cookie
HttpCookie cookie = new HttpCookie("member");
cookie.Values.Add("memberid", user.Id.ToString());
cookie.Values.Add("membername", user.Membername);
//Cookie失效期限为一年
cookie.Expires = DateTime.Now.AddYears(1);
Response.Cookies.Add(cookie);
//获取Cookie
Request.Cookie["member"]["memberid"].ToString()