public IActionResult EditExamTitle(Examtitle et)
        {
            SystemContext context = HttpContext.RequestServices.GetService(typeof(Exam_Management_System.Models.SystemContext)) as SystemContext;

            using (MySqlConnection conn = context.GetConnection())
            {
                conn.Open();
                string sql = $"Update examtitle set examtitle_name='{et.Name}' where id={et.Id}";
                using (MySqlCommand command = new MySqlCommand(sql, conn))
                {
                    command.ExecuteNonQuery();
                    conn.Close();
                }
            }
            return(Redirect("/examtitle/index"));
        }
        public IActionResult AddExamTitle(Examtitle examtitle)
        {
            SystemContext context = HttpContext.RequestServices.GetService(typeof(Exam_Management_System.Models.SystemContext)) as SystemContext;

            using (MySqlConnection conn = context.GetConnection())
            {
                conn.Open();
                string sql = $"Insert Into examtitle (examtitle_name) Values ('{examtitle.Name}')";
                using (MySqlCommand command = new MySqlCommand(sql, conn))
                {
                    command.ExecuteNonQuery();
                    conn.Close();
                }
            }
            return(Redirect("/examtitle/Index"));
        }