private void XuatBBGioKoDungQuyDinh_Va_DiTreVesom(object sender, WaitWindowEventArgs e)
        {
            string saveFileName = (string)e.Arguments[0];

            using (var p = new ExcelPackage()) {
                //2. xuat bb bang ChiTietVaoTreRaSom

                #region ghi sheet bang ChiTietVaoTreRaSom

                p.Workbook.Worksheets.Add("ChiTietVaoTreRaSom");
                var ws = p.Workbook.Worksheets["ChiTietVaoTreRaSom"];
                ws.Name = "ChiTietVaoTreRaSom";                 //Setting Sheet's name
                XL.ExportSheetTreSom(ws, m_dsnv);
                #endregion

                #region ghi sheet bang ChiTietVaoTreRaSom

                p.Workbook.Worksheets.Add("ThieuChamCong_KhongNhanDienCa");
                ws      = p.Workbook.Worksheets["ThieuChamCong_KhongNhanDienCa"];
                ws.Name = "ThieuChamCong_KhongNhanDienCa";                 //Setting Sheet's name
                XL.ExportSheetThieuChamCong_KhongHieuCa(ws, m_dsnv);
                #endregion
                Byte[] bytes = p.GetAsByteArray();
                XL.XuatFileExcel(saveFileName, bytes, "frmXuatBBCongPC_XuatBBGioKoDungQuyDinh_Va_DiTreVesom");
            }
        }