private void ShowLichSuTK(string tentk)
        {
            lsvThongKe.FullRowSelect = true;

            string dk = layYeuLichSu(/*grbLichSu*/ pnt1);

            List <LichSu> ls = LichSuDAL.laylsGD(tentk, dk);

            if (tentk != "")
            {
                lsvThongKe.Columns.Add("Thời gian");
                lsvThongKe.Columns.Add("Tiền thêm");
                lsvThongKe.Columns.Add("TG thêm");

                //List<LichSu> ls = LichSuDAL.layLichSuGD(txbTkTk.Text);

                for (int i = ls.Count - 1; i >= 0; i--)
                {
                    ListViewItem item = new ListViewItem();
                    item.Text = ls[i].NgayGD.ToString();

                    item.SubItems.Add(new ListViewItem.ListViewSubItem()
                    {
                        Text = ls[i].TienThem.ToString() + " đồng"
                    });
                    item.SubItems.Add(new ListViewItem.ListViewSubItem()
                    {
                        Text = ls[i].TGThem.ToString() + " giờ"
                    });

                    lsvThongKe.Items.Add(item);
                }
            }
            else
            {
                lsvThongKe.Columns.Add("Tên tài khoản");
                lsvThongKe.Columns.Add("Thời gian");
                lsvThongKe.Columns.Add("Tiền thêm");
                lsvThongKe.Columns.Add("Thời gian thêm");

                // List<LichSu> ls = LichSuDAL.laylsGDtrongNgay();

                for (int i = ls.Count - 1; i >= 0; i--)
                {
                    ListViewItem item = new ListViewItem();
                    item.Text = ls[i].TenTK.Trim();

                    item.SubItems.Add(new ListViewItem.ListViewSubItem()
                    {
                        Text = ls[i].NgayGD.ToString()
                    });
                    item.SubItems.Add(new ListViewItem.ListViewSubItem()
                    {
                        Text = ls[i].TienThem.ToString() + " đồng"
                    });
                    item.SubItems.Add(new ListViewItem.ListViewSubItem()
                    {
                        Text = ls[i].TGThem.ToString() + " giờ"
                    });

                    lsvThongKe.Items.Add(item);
                }
            }
        }
 public LichSuBUS()
 {
     lsDAL = new LichSuDAL();
 }