private void Window_Loaded(object sender, RoutedEventArgs e)
{
PageDangNhap dn = new PageDangNhap();
dn.ShowInTaskbar = false;
dn.ShowDialog();
}
private void btndangxuat_Click(object sender, RoutedEventArgs e)
{
btnkhuvuc.IsEnabled = false;
btnban.IsEnabled = false;
btnthucdon.IsEnabled = false;
btngiamgia.IsEnabled = false;
btnthongke.IsEnabled = false;
btntaikhoan.IsEnabled = false;
btnphucvu.IsEnabled = false;
btndangxuat.IsEnabled = false;
btnthoat.IsEnabled = false;
PageDangNhap dn = new PageDangNhap();
dn.ShowDialog();
}
