private void barButtonItem12_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
DocGia_DTO dg = new DocGia_DTO();
// dg.MaDocGia = int.Parse(MaDGia);
dg.HoTen = txtTen.Text;
dg.GioiTinh = 1;
if (txtGTinh.Text == "Nam")
{
dg.GioiTinh = 0;
}
dg.NgaySinh = dtNgaySinh.Value;
dg.Email = txtEmail.Text;
dg.DienThoai = txtDienThoai.Text;
dg.DiaChi = txtDiaChi.Text;
DocGia_DAO.Them(dg);
grdDocGia.DataSource = DocGia_DAO.LoadDuLieu();
}