public Form1()
{
conn = new DAL_KetNoiDB();
InitializeComponent();
}
public Luong()
{
conn = new DAL_KetNoiDB();
InitializeComponent();
}
public PhongBancs()
{
conn = new DAL_KetNoiDB();
InitializeComponent();
}
public Chucvu()
{
conn = new DAL_KetNoiDB();
InitializeComponent();
}