private void LoadDuLieuKhachHang()
{
//frmPhieuDangKy frmPDK = new frmPhieuDangKy();
KhachHang_DTO khDTO = KhachHang_BLL.LoadDuLieuKhachHang(frmPhieuDangKy.MaKH);
txtMaKH.Text = khDTO.MaKhachHang;
txtTenKH.Text = khDTO.TenKhachHang;
txtDiaChi.Text = khDTO.DiaChi;
txtDienThoai.Text = khDTO.SDT;
dtpNgaySinh.Text = Convert.ToDateTime(khDTO.NgaySinh).ToString();
txtCMND.Text = khDTO.CMND;
cmbQuocTich.Text = khDTO.QuocTich;
}