private void OpenFunc(object sender, RoutedEventArgs e) { int value = cbFuncSelect.SelectedIndex; if (value == 0) { frmChucNang.MainWindow GDLoaiPhong = new frmChucNang.MainWindow(); GDLoaiPhong.Show(); } else if (value == 1) { frmChucNangThongKe.MainWindow GDThongKe = new frmChucNangThongKe.MainWindow(); GDThongKe.Show(); } else { frmChucNang.MainWindow GDLoaiPhong = new frmChucNang.MainWindow(guis[0].GetMainWindow()); GDLoaiPhong.Show(); } }