private void grcBaoCaoDanhSoTheoKhachHang_Load(object sender, EventArgs e) { grcBaoCaoDanhSoTheoKhachHang.DataSource = cusBUS.getListKhachHangMuaHang(b, b, 0); dtTu.Text = dtDen.Text = DateTime.Now.ToString("M/d/yyyy"); listInforSell = detailSellBus.getThongTinHoaDon(b, b, 0); }