private void BtnThongKe_Click(object sender, EventArgs e) { try { string cbbSelected = cbbSelectThongKe.SelectedItem.ToString(); if (cbbSelected == "Ngày" || cbbSelected == "Tháng" || cbbSelected == "Năm" || cbbSelected == "Tổng") { dtgvThongKe.Rows.Clear(); int ID = dtgvThongKe.Rows.Count + 1; ThongKe NV = new ThongKe(); string valueThongke = cbbSelectThongKe.SelectedItem.ToString(); foreach (THONGKEDONHANGDABAN item in NV.THONGKETHEONTN(dTimePicker.Value, valueThongke)) { dtgvThongKe.Rows.Add(ID, item.MADH, item.TENKH, item.TENNV, item.TIMEXUAT, item.THANHTIEN); ID++; } lbTongTien.Text = String.Format("{0:n0} VNĐ", NV.TongThanhTien()); } if (cbbSelected == "Quý") { dtgvThongKe.Rows.Clear(); int ID = dtgvThongKe.Rows.Count + 1; ThongKe NV = new ThongKe(); string valueThongke = cbbQuy.SelectedItem.ToString(); foreach (THONGKEDONHANGDABAN item in NV.TKQuy(dTimePicker.Value, valueThongke)) { dtgvThongKe.Rows.Add(ID, item.MADH, item.TENKH, item.TENNV, item.TIMEXUAT, item.THANHTIEN); ID++; } lbTongTien.Text = String.Format("{0:n0} VNĐ", NV.TongThanhTien()); } } catch (Exception) { } }