aspx页面状态管理Cookie和ViewState

protected void Button2_Click(object sender, EventArgs e)
        {
            HttpCookie cookie = new HttpCookie("user");
            cookie.Value = "这是cookie";
            cookie["sex"] = "女";
            cookie.Values.Add("age", "18");
            cookie.Expires = DateTime.Now.AddHours(1);
            Response.AppendCookie(cookie);//将Cookie追加到内部cookie
            //Response.Cookies.Add(cookie);//跟上面一样
        }

2获取Cookie

protected void Button1_Click(object sender, EventArgs e)
        {
            //获取客户端发送的Cookie
            HttpCookie cookie1 = Request.Cookies["user"];
            if (cookie1 == null)
            {
                Response.Write("木有发现cookie");
            }
            else
            {
                Response.Write("cooki值为:"+cookie1.Value+"<br/>");
                Response.Write("sex值为:"+cookie1["sex"]+"<br/>");
                Response.Write("age值为:"+cookie1["age"]+"<br/>");
            }
        }

3,删除cookie

//将cookie有效期设置为过去某个时间,浏览器会检查自动删除
            HttpCookie cookie = Request.Cookies["user"];
            cookie.Expires = DateTime.Now.AddHours(-1);

1. 1. 效果图

1. 不同域的Cookie无法共享,如果站点有子域(baiyun.com和sell,baiyun.com),可以设置cookie的Domain属性

   

   cookie.Domain="baiyun.com";
   cookie.Domain="sell.baiyun.com";

   这样cookie就能用于主域和子域了