private FileResult ExportPerformanceReport(vmAdmin_PerformanceReport report, vmAdmin_PerformanceFilter filter, string title, string filename)
        {
            int rowNumber = 0;
            NPOI.SS.UserModel.IRow row;

            //Create new Excel workbook
            var workbook = new HSSFWorkbook();

            //Create new Excel sheet
            var sheet = CreateSheet(workbook);

            var allStyles = ReportUtilities.CreateStyles(workbook);

            ReportUtilities.ExportReportHeader(title, sheet, allStyles, ref rowNumber);
            ExportReportSubheader(sheet, filter, allStyles, ref rowNumber);

            ExportReportValues(report, sheet, allStyles, ref rowNumber);
            ExportReportTshirts(report, sheet, allStyles, ref rowNumber);
            ExportReportFees(report, sheet, allStyles, ref rowNumber);
            ExportReportCharges(report, sheet,allStyles, ref rowNumber);

            //Write the workbook to a memory stream
            var output = new MemoryStream();
            workbook.Write(output);

            //Return the result to the end user

            return File(output.ToArray(),   //The binary data of the XLS file
                "application/vnd.ms-excel", //MIME type of Excel files
                filename);     //Suggested file name in the "Save as" dialog which will be displayed to the end user
        }
        private static void ExportReportValues(vmAdmin_PerformanceReport report, NPOI.SS.UserModel.ISheet sheet,  StyleContainer allStyles, ref int rowNumber)
        {
            var row = sheet.CreateRow(rowNumber++);

            ReportUtilities.CreateCell(row, 0, "Event Revenue", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 1, report.TotalRevenue, allStyles.Currency);
            ReportUtilities.CreateCell(row, 2, "Available Spots", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 3, report.TotalSpots, allStyles.RightAligned);
            ReportUtilities.CreateCell(row, 4, "Fee Total", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 5, report.FeeValue, allStyles.Currency);
            ReportUtilities.CreateCell(row, 6, "Charge Total", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 7, report.ChargeValue, allStyles.Currency);

            row = sheet.CreateRow(rowNumber++);
            ReportUtilities.CreateCell(row, 0, "Days count", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 1, report.DayCount, allStyles.RightAligned);
            ReportUtilities.CreateCell(row, 2, "Active Registrations", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 3, report.SpotsTaken, allStyles.RightAligned);
            ReportUtilities.CreateCell(row, 4, "Discount value", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 5, report.DiscountValue, allStyles.Currency);
            ReportUtilities.CreateCell(row, 6, "Local Tax", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 7, report.ChargeLocalTaxValue, allStyles.Currency);

            row = sheet.CreateRow(rowNumber++);
            ReportUtilities.CreateCell(row, 0, "Event count", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 1, report.EventCount, allStyles.RightAligned);
            ReportUtilities.CreateCell(row, 2, "Spots Available", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 3, report.SpotsLeft, allStyles.RightAligned);
            ReportUtilities.CreateCell(row, 4, "Local Tax", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 5, report.LocalTaxValue, allStyles.Currency);
            ReportUtilities.CreateCell(row, 6, "State Tax", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 7, report.ChargeStateTaxValue, allStyles.Currency);

            row = sheet.CreateRow(rowNumber++);
            ReportUtilities.CreateCell(row, 0, "Revenue Per Day", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 1, report.RevenuePerDay, allStyles.Currency);
            ReportUtilities.CreateCell(row, 2, "Registrations Per Day", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 3, report.RegPerDay, allStyles.RightAligned);
            ReportUtilities.CreateCell(row, 4, "State Tax", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 5, report.StateTaxValue, allStyles.Currency);
            ReportUtilities.CreateCell(row, 6, "Total Revenue", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 7, report.ChargeActualRevenue, allStyles.Currency);

            row = sheet.CreateRow(rowNumber++);
            ReportUtilities.CreateCell(row, 0, "Revenue Per Event", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 1, report.RevenuePerEvent, allStyles.Currency);
            row.CreateCell(2);
            row.CreateCell(3);
            ReportUtilities.CreateCell(row, 4, "Total Revenue", allStyles.LeftAligned);
            ReportUtilities.CreateCell(row, 5, report.FeeActualRevenue, allStyles.Currency);
            row.CreateCell(6);
            row.CreateCell(7);

            row = sheet.CreateRow(rowNumber++);
        }
        private static void ExportReportFees(vmAdmin_PerformanceReport report, NPOI.SS.UserModel.ISheet sheet, StyleContainer allStyles, ref int rowNumber)
        {
            if (report.FeeReport.Count > 0)
            {
                var row = sheet.CreateRow(rowNumber++);
                ReportUtilities.CreateCell(row, 0, "Event Fees", allStyles.Header2Style);
                foreach (var feeType in report.FeeReport.GroupBy(x => x.FeeType).Select(x => x.Key))
                {
                    row = sheet.CreateRow(rowNumber++);
                    ReportUtilities.CreateCell(row, 0, feeType.ToString(), allStyles.Header3Style);
                    row = sheet.CreateRow(rowNumber++);
                    ReportUtilities.CreateCell(row, 0, "Cost", allStyles.TitleStyle);
                    ReportUtilities.CreateCell(row, 1, "Use Count", allStyles.TitleStyle);
                    ReportUtilities.CreateCell(row, 2, "Cost Total", allStyles.TitleStyle);
                    ReportUtilities.CreateCell(row, 3, "Discount Total", allStyles.TitleStyle);
                    ReportUtilities.CreateCell(row, 4, "Local Tax Total", allStyles.TitleStyle);
                    ReportUtilities.CreateCell(row, 5, "State Tax Total", allStyles.TitleStyle);
                    ReportUtilities.CreateCell(row, 6, "Actual Total", allStyles.TitleStyle);

                    foreach (var fee in report.FeeReport.Where(x => x.FeeType == feeType).OrderBy(x => x.Cost))
                    {
                        row = sheet.CreateRow(rowNumber++);
                        ReportUtilities.CreateCell(row, 0, fee.Cost, allStyles.Currency);
                        ReportUtilities.CreateCell(row, 1, fee.UseCount, allStyles.RightAligned);
                        ReportUtilities.CreateCell(row, 2, fee.CostTotal, allStyles.Currency);
                        ReportUtilities.CreateCell(row, 3, fee.DiscountTotal, allStyles.Currency);
                        ReportUtilities.CreateCell(row, 4, fee.LocalTaxTotal, allStyles.Currency);
                        ReportUtilities.CreateCell(row, 5, fee.StateTaxTotal, allStyles.Currency);
                        ReportUtilities.CreateCell(row, 6, fee.ActualTotal, allStyles.Currency);
                    }
                    row = sheet.CreateRow(rowNumber++);
                }
            }
        }
        private static void ExportReportTshirts(vmAdmin_PerformanceReport report, NPOI.SS.UserModel.ISheet sheet,  StyleContainer allStyles, ref int rowNumber)
        {
            if (report.TShirtSizes != null && report.TShirtSizes.Count > 0)
            {
                var row = sheet.CreateRow(rowNumber++);
                ReportUtilities.CreateCell(row, 0, "T-Shirts", allStyles.Header3Style);
                foreach (var size in report.TShirtSizes)
                {
                    row = sheet.CreateRow(rowNumber++);
                    ReportUtilities.CreateCell(row, 0, size.Keys.ElementAt(0).ToString(), allStyles.LeftAligned);
                    ReportUtilities.CreateCell(row, 1, size.Values.ElementAt(0), allStyles.RightAligned);
                }

                row = sheet.CreateRow(rowNumber++);

            }
        }
        private static void ExportReportCharges(vmAdmin_PerformanceReport report, NPOI.SS.UserModel.ISheet sheet, StyleContainer allStyles, ref int rowNumber)
        {
            if (report.ChargeReport.Count > 0)
            {
                var row = sheet.CreateRow(rowNumber++);
                ReportUtilities.CreateCell(row, 0, "Event Charges", allStyles.Header2Style);
                row = sheet.CreateRow(rowNumber++);

                ReportUtilities.CreateCell(row, 0, "Name", allStyles.TitleStyle);
                ReportUtilities.CreateCell(row, 1, "Cost Total", allStyles.TitleStyle);
                ReportUtilities.CreateCell(row, 2, "Discount Total", allStyles.TitleStyle);
                ReportUtilities.CreateCell(row, 3, "Local Tax Total", allStyles.TitleStyle);
                ReportUtilities.CreateCell(row, 4, "State Tax Total", allStyles.TitleStyle);
                ReportUtilities.CreateCell(row, 5, "Actual Total", allStyles.TitleStyle);

                foreach (var charge in report.ChargeReport.OrderBy(x => x.Name))
                {
                    row = sheet.CreateRow(rowNumber++);
                    ReportUtilities.CreateCell(row, 0, charge.Name, allStyles.LeftAligned);
                    ReportUtilities.CreateCell(row, 1, charge.CostTotal, allStyles.Currency);
                    ReportUtilities.CreateCell(row, 2, charge.DiscountTotal, allStyles.Currency);
                    ReportUtilities.CreateCell(row, 3, charge.LocalTaxTotal, allStyles.Currency);
                    ReportUtilities.CreateCell(row, 4, charge.StateTaxTotal, allStyles.Currency);
                    ReportUtilities.CreateCell(row, 5, charge.ActualTotal, allStyles.Currency);
                }

            }
        }