private void LoadSanPham()
{
TruyVanLayDuLieu dao = new TruyVanLayDuLieu();
dataSanPham.DataSource = dao.Laydulieu("SanPham_Select");
dataSanPham.DataBind();
}
private void LoadDanhMuc()
{
TruyVanLayDuLieu dao = new TruyVanLayDuLieu();
dataDanhMuc.DataSource = dao.Laydulieu("DanhMuc_Select");
dataDanhMuc.DataBind();
}