private void btnSua_Click(object sender, EventArgs e) { int MaPN = Convert.ToInt32(txtMaPN.Text); int MaNV = Convert.ToInt32(txtMaNV.Text); int MaNCC = Convert.ToInt32(txtNCC.Text); string NgayNhap = dtpNgayNhap.Value.ToString("MM/dd/yyyy"); NhanVien NV = new NhanVien(MaNV, "", ""); PhieuNhap phieunhap = new PhieuNhap(MaPN, NgayNhap, MaNV, MaNCC); PhieuNhapBLL.PhieuNhap_Update(phieunhap); LoadPhieuNhap(); }