//Load dataGridView dgv_AllChuDe
private void loadDataChuDe()
{
dgv_AllChuDe.DataSource = ChuDeBLL.getChuDe().DataSource;
txt_MaChuDe.Text = ChuDeBLL.getMa().ToString();
txt_TenChuDe.ResetText();
ckbx_ChuDe.ResetText();
}
public Form1()
{
InitializeComponent();
//dgv_AllHD.DataSource = HoaDonBLL.getAllSach().DataSource;
dtp_NgayHD.Value = DateTime.Now;
//txt_MaHD.Text = HoaDonBLL.getMaHD().ToString();
dgv_AllChuDe.DataSource = ChuDeBLL.getChuDe();
}