private void simpleButton1_Click(object sender, EventArgs e) { BUS_HDDK busdk = new BUS_HDDK(); DTO_HoaDonDangKy dto_dk = new DTO_HoaDonDangKy(); dto_dk.Ma_kh = txt_id.Text; dto_dk.Ngay = DateTime.Today; dto_dk.Phihoamang = Int64.Parse(txt_phm.Text); busdk.Insert(dto_dk); load(); }