C#写入登陆Cookies

protected void Page_Load(object sender, EventArgs e) 
        { 
            //打开登录页面时获取客户端cookie值并写入前台控件中 
            HttpCookie cookie = Request.Cookies["name"]; 
            if (cookie == null) 
            { 
                UserName.Text = ""; 
  
            } 
            else
            { 
                UserName.Text = cookie.Value; 
            } 
        } 
  
        protected void btnSubmit_Click(object sender, EventArgs e) 
        { 
            string username = Request.QueryString["UserName"]; 
            string password = Request.QueryString["PassWord"]; 
            if (登录成功) 
            { 
                Response.Write("登陆成功"); 
                HttpCookie cookie=new HttpCookie("name",username);//获取用户的用户名 
                cookie.Expires = DateTime.Now.AddDays(10);//设置cookie过期时间为10天后 
                Response.Cookies.Add(cookie);//将cookie写入客户端 
            } 
            else
            { 
                Response.Write("登陆失败"); 
            } 
        }