public void listTinh(string selected)
{
List <vTinh> tinh = _thanhphoRepository.ListTinh().ToList();
ViewBag.tinh = new SelectList(tinh, "Matinh", "Tentinh", selected);
}
public IActionResult index()
{
var listTinh = _thanhphoRepository.ListTinh().OrderBy(x => x.Matinh);
return(View(listTinh));
}