//Thống kê Price private void btnThongKe_Click(object sender, EventArgs e) { int priceMonth, priceYear, valMonth, valYear; if (lbDay.Text == "" || lbMonth.Text == "" || lbYear.Text == "") { MessageBox.Show("Bạn Chưa Fill Day ,Month ,Year"); } else { if (gvThongke.Rows.Count > 0) { priceMonth = _thongkeBLL.FillMonth(month, year); tbPrice.Text = priceMonth.ToString(); priceYear = _thongkeBLL.FillPriceYear(year); tbYearPrice.Text = priceYear.ToString(); valMonth = _thongkeBLL.FillValueMonth(month, year); valYear = _thongkeBLL.FillValueYear(year); valueMonth.Value = valMonth; PerMonth.Text = valMonth.ToString(); ValueYear.Value = valYear; PerYear.Text = valYear.ToString(); } else { tbPrice.Text = ""; tbYearPrice.Text = ""; valueMonth.Value = 0; ValueYear.Value = 0; PerMonth.Text = "0"; PerYear.Text = "0"; } } return; }