//第一种添加Cookie方法         HttpCookie myCookie = new HttpCookie("userrole");         myCookie.Values["a"] = "a";         myCookie.Values[""] = "b";         myCookie.Expires.AddDays(1);         Response.Cookies.Add(myCookie);         //Response.AppendCookie(mycookie);这个也可以添加         //第一种获取Cookie方法         Response.Write(Request.Cookies["userrole"].Values["a"].ToString());         //第二种添加Cookie方法         HttpCookie myCookie = new HttpCookie("userrole");         myCookie.Values["a"] = "a";         myCookie.Values["b"] = "b";         myCookie.Expires.AddDays(1);         Response.Cookies.Add(myCookie);         //第二种读取Cookie方法         HttpCookie cookie = Request.Cookies["userrole"];         Response.Write(cookie.Values["a"].ToString());         Response.Write(cookie.Values["b"].ToString());         //第三种添加Cookie方法         HttpCookie myCookie = new HttpCookie("userrole");         myCookie.Value = "a";         Response.Cookies.Add(myCookie);         //第三种读取Cookie方法         Response.Write(Request.Cookies["userrole"].Value);         //第四种添加Cookie方法         HttpContext.Current.Response.Cookies.Add(new HttpCookie("userrole", "超级管理员"));         Response.Cookies["userrole"].Value = "超级管理员";         HttpCookie cookie = Request.Cookies["userrole"];         Response.Write(cookie.Value);         //第三种读取Cookie方法         Response.Write(Request.Cookies["userrole"].Value);