操作cookie

在http通信中，数据是无状态的，即无法在通信中识别请求用户，于是在客户端浏览器中按照键值对的格式存储一段字符串信息，可以进行状态识别

插件：jquery.cookie.js

写：$.cookie("key","value")

读：$.cookie("key")

后台Cookie

存储

HttpCookie cookie = new HttpCookie("account");
            cookie.Expires = DateTime.Now.AddMinutes(20);
            cookie.Value = "account";
            Response.AppendCookie(cookie);

取值

HttpCookie cookies = Request.Cookies["account"];
            if (cookies == null)
            {
                filterContext.Result = Redirect("/Login");
                return;
            }
            var rkey = cookies.Value;