private void dgvHoaDon_Click(object sender, EventArgs e) { try { if (dgvHoaDon.SelectedRows != null) { btnXacNhanHD.Enabled = true; DataGridViewRow row = dgvHoaDon.SelectedRows[0]; MaPhong = row.Cells["MaPhongg"].Value.ToString(); ThanhTien = Convert.ToInt32(row.Cells["ThanhTienn"].Value); txtMaCTHD.Text = row.Cells["MaChiTietHoaDon"].Value.ToString(); txtSoTienDatTruoc.Text = Convert.ToString(HoaDon_BLL.LayTienDatCoc(MaPhong)); } } catch (Exception) { return; } }