public ActionResult Index(user objchk)
        {
            if (ModelState.IsValid)
            {
                using (regisEntities db = new regisEntities())
                {
                    var obj = db.users.Where(a => a.username.Equals(objchk.username) && a.password.Equals(objchk.password)).FirstOrDefault();

                    if (obj != null)
                    {
                        Session["userid"]   = obj.id.ToString();
                        Session["username"] = obj.username.ToString();
                        return(RedirectToAction("Index", "Home"));
                    }

                    else
                    {
                        ModelState.AddModelError("", "The username or password Incorrect");
                    }
                }
            }

            return(View(objchk));
        }