内置对象之Cookie

if (!this.IsPostBack)
        {
            try
            {
                HttpCookie MyCookie = new HttpCookie("MyCookie");
                MyCookie.Value = Server.HtmlEncode("我的Cookie应用程序");//自动把乱码转换成正常的字符串，如果直接赋值字符串就会出现乱码
                MyCookie.Expires = DateTime.Now.AddDays();
                Response.Cookies.Add(MyCookie);
                Response.Write("Cookie创建成功");
                HttpCookie GetCookie = Request.Cookies["MyCookie"];
                Response.Write("Cookie的值:" + GetCookie.Value.ToString()+"<br/>");

                Response.Write("Cookie的过期时间" + GetCookie.Expires.ToString()+"<br/>");
            }
            catch
            {
                Response.Write("Cookie创建失败");
            }
        }