asp.net cookie 操作 写入 与 读取

 

 

 

 protected void init()
    {
        HttpCookie ck = Request.Cookies["yao"];
        if (ck == null)
        {
            ck = new HttpCookie("yao");
            ck.Value = DateTime.Now.ToString();
            ck.Expires = DateTime.Now.AddSeconds(30);//设置有效期是30秒
            Response.Cookies.Add(ck);//写入到客户端
            Response.Write("new cookie");
        }
        else
        {
            Response.Write(ck.Value);
        }
    }