private void HienThiDonViTinhLenComboBox() { lstGiaLoaiPhong = LoaiPhong_BLL.HienThiGiaLoaiPhongLenComboBox(); cmbGiaLoaiPhong.DataSource = lstGiaLoaiPhong; cmbGiaLoaiPhong.DisplayMember = "GiaLoaiPhong"; cmbGiaLoaiPhong.ValueMember = "MaLoaiPhong"; cmbGiaLoaiPhong.FormatString = "#,## VND"; }