public ActionResult ApplyForHostel(int id, int idd, Hostel model)
        {
            var student    = db.Students.Where(c => c.StudentId == idd).SingleOrDefault();
            var collection = db.Hostels.Where(c => c.HostelId == id).SingleOrDefault();
            var HostelRel  = new StudentHostelRelation
            {
                HostelId  = id,
                StudentId = student.StudentId,
            };

            db.StudentHostelRelations.Add(HostelRel);
            db.SaveChanges();
            return(RedirectToAction("StudentsList3"));
        }
        public ActionResult ApplyForHostel(int id, Hostel model)
        {
            var user       = UserManager.FindById(User.Identity.GetUserId());
            var student    = db.Students.Where(c => c.UserId == user.Id).SingleOrDefault();
            var collection = db.Hostels.Where(c => c.HostelId == id).SingleOrDefault();

            if (db.StudentHostelRelations.Any(c => c.StudentId == student.StudentId))
            {
                return(RedirectToAction("AppliedHostel"));
            }
            var HostelRel = new StudentHostelRelation
            {
                HostelId  = id,
                StudentId = student.StudentId,
            };

            db.StudentHostelRelations.Add(HostelRel);
            db.SaveChanges();
            return(RedirectToAction("AppliedHostel"));
        }