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();//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");

             }

         }