protected void BtnLogin_Click(object sender, EventArgs e)
    {
        
        haifei.BLL.HF_USER BLLHFUSER = new haifei.BLL.HF_USER();
        string PassMd5 = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(this.TxtPassword.Text,"MD5");
        bool Islogin = BLLHFUSER.Login(this.TxtUsername.Text, PassMd5);
        if (Islogin == true)
        {
            System.Web.Security.FormsAuthentication.RedirectFromLoginPage(this.TxtUsername.Text, true);
            HttpCookie lcookie = Context.Response.Cookies[FormsAuthentication.FormsCookieName];
            lcookie.Expires = DateTime.Now.AddYears(1);
        }
       
    }