public IActionResult RegistroAlumnos(AlumnoViewModel alumno) { if (alumno != null) { string error = ValidarAlumno(alumno); if (error != "") { ModelState.AddModelError("Error", error); return(View(alumno)); } try { AlumnoRepository repos = new AlumnoRepository(); repos.InsertAlumno(alumno); } catch (Exception ex) { ModelState.AddModelError("Error", ex.Message); return(View(alumno)); } } return(RedirectToAction("Index")); }