private void thongKeChiThu(object sender, EventArgs e) { if (rdNam.Checked) { int nam = int.Parse(cbxtknamNam.SelectedItem.ToString()); tblThongKe.DataSource = hd.thongKeNam(nam); } else if (rdQuy.Checked) { string quy = cbxtkquyQuy.SelectedItem.ToString(); int nam = int.Parse(cbxtkquyNam.SelectedItem.ToString()); tblThongKe.DataSource = hd.thongKeQuy(quy, nam); } else if (rdThang.Checked) { int thang = int.Parse(cbxtkthangThang.SelectedItem.ToString()); int nam = int.Parse(cbxtkthangNam.SelectedItem.ToString()); tblThongKe.DataSource = hd.thongKeThang(thang, nam); } double tongThuTienPhong = 0; double tongThuTienDichVu = 0; for (int i = 0; i < tblThongKe.RowCount; i++) { tongThuTienPhong += double.Parse(tblThongKe.Rows[i].Cells[3].Value.ToString().Trim()); tongThuTienDichVu += double.Parse(tblThongKe.Rows[i].Cells[4].Value.ToString().Trim()); } lblTongThuDichVu.Text = tongThuTienDichVu + ".00 VNĐ"; lblTongThuTienPhong.Text = tongThuTienPhong + ".00 VNĐ"; lblTongChiThu.Text = (tongThuTienDichVu + tongThuTienPhong) + ".00 VNĐ"; }