private void SuDungDichVu_Load(object sender, EventArgs e) { int i = dgvKhachHang.CurrentCell.RowIndex; string str_mapt = dgvKhachHang.Rows[i].Cells["MaPT"].Value.ToString().Trim(); //lấy tên các dịch vụ vào combo box cboLoaiDV.DataSource = dal_LoaiDV.ThongTinCacLoaiDichVu(); cboLoaiDV.DisplayMember = "TenLDV"; cboLoaiDV.ValueMember = "MaLDV"; dgvTenDV.DataSource = dal_DichVu.ThongTinCacDichVuTheoMaLoaiDichVu(cboLoaiDV.SelectedValue.ToString().Trim()); dgvDichVuDaSuDung.DataSource = dal_SDDV.ThongTinSuDungDichVuTheoMaPhieuThue(str_mapt); }