Cookie的用法

登录:

string username=txtusername.Text ;
            string userpwd=txtuserpwd.Text ;
            //版本，关联的用户名，到期时间，发出时间，是否持久，自定义数据
            System.Web.Security.FormsAuthenticationTicket ticket=new FormsAuthenticationTicket (1,username,DateTime.Now,DateTime.Now.AddMinutes(1),
                this.CheckBox1.Checked,"User");
            //加密
            string cookieStr=FormsAuthentication.Encrypt(ticket);

            HttpCookie cookie=new HttpCookie("login",cookieStr);
            if(CheckBox1.Checked)
            {
                cookie.Expires=ticket.Expiration;
            }
            
            Response.SetCookie(cookie);
            Response.Redirect("WebForm2.aspx");

 登出：

System.Web.Security.FormsAuthentication.SignOut();
   Response.Redirect("WebForm1.aspx");