C# Cookies设置和读取

 public ActionResult Index()
        {
            #region 写入Cookies
            HttpCookie cookie = new HttpCookie("CookieName");//初使化并设置Cookie的名称
            DateTime dt = DateTime.Now; //获取当前时间
            TimeSpan ts = new TimeSpan(0, 0, 1, 0, 0);//过期时间为1分钟
            cookie.Expires = dt.Add(ts);//设置过期时间  
            cookie.Values.Add("UserName", "admin");
            cookie.Values.Add("Pwd", "123456");
            Response.AppendCookie(cookie); //响应一个Cookies
                                           //在网页Cookies中的Name 是CookieName；Value是UserName=admin&Pwd=123456
            HttpCookie cookie1 = new HttpCookie("MaxMin"); //添加第二个cookies

            cookie1.Expires = dt.Add(ts);//设置过期时间  
            cookie1.Values.Add("Test", "aaaaaa");
            Response.AppendCookie(cookie1); //响应一个Cookies
            //网页中 NAME 是MaxMin ; Value 是Test=aaaaaa

            #endregion

            #region 读取Cookies
            HttpCookie cokie = new HttpCookie("MyCook");//初使化
            if (Request.Cookies["CookieName"] != null)
            {
                //Response.Write("Cookie中键值为userid的值:" + Request.Cookies["MyCook"]["userid"]);//整行
                //Response.Write("Cookie中键值为userid2的值" + Request.Cookies["MyCook"]["userid2"]);
                Response.Write(Request.Cookies["CookieName"].Value);//输出全部的值
            }
            #endregion

            #region 修改Cookies

            //获取客户端的Cookie对象
            HttpCookie cok = Request.Cookies["CookieName"];

            if (cok != null)
            {
                //修改Cookie的两种方法
                cok.Values["userid"] = "alter-value";
                cok.Values.Set("userid", "alter-value");

                //往Cookie里加入新的内容
                cok.Values.Set("newid", "newValue");
                Response.AppendCookie(cok);
            }
            #endregion

            #region 删除Cookies
            HttpCookie Cookie = Request.Cookies["CookieName"];
            if (Cookie != null)
            {
                Cookie.Values.Remove("userid");//移除键值为userid的值
            }
            else
            {
                TimeSpan ts1 = new TimeSpan(-1, 0, 0, 0);
                Cookie.Expires = DateTime.Now.Add(ts);//删除整个Cookie，只要把过期时间设置为现在　　
            }
            Response.AppendCookie(Cookie);
            #endregion



            HttpCookie A = Request.Cookies["Mxx"];
            if (A==null)
            {
                return Content(null);
            }
            else
            {
                return Content(A.Name);
            }
        }