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Workbook AutoCalculation | C#
Program.cs:
C#
using Bytescout.Spreadsheet; using System; using System.Collections.Generic; using System.Diagnostics; using System.Drawing; namespace WorkbookAutoCalculation { class Program { static void Main(string[] args) { try { // Data to be written in spreadsheet var lstProducts = new List<InvoiceProduct> { new InvoiceProduct{ ProductName = "Product 1", Price = 30, Quantity = 10 }, new InvoiceProduct{ ProductName = "Product 2", Price = 40, Quantity = 30 }, new InvoiceProduct{ ProductName = "Product 3", Price = 50, Quantity = 15 }, new InvoiceProduct{ ProductName = "Product 4", Price = 20, Quantity = 20 } }; // Generate Workbook in memory var document = _GetSpreadsheet(lstProducts); // Export to XLSX document.SaveAsXLSX("Invoice.xlsx"); //document.SaveAsXLS("Invoice.xls"); // Open output file Process.Start("Invoice.xlsx"); } catch (Exception ex) { Console.WriteLine(ex.Message); } Console.WriteLine("Press enter key to exit..."); Console.ReadLine(); } /// <summary> /// Get Spreadsheet /// </summary> private static Spreadsheet _GetSpreadsheet(List<InvoiceProduct> lstProducts) { // Create new Spreadsheet Spreadsheet document = new Spreadsheet(); // Enable auto-calculation of formulas document.Workbook.AutoCalculation = true; document.Workbook.DefaultFont = new SpreadsheetFont("Arial", 10); // Add new worksheet Worksheet Sheet = document.Workbook.Worksheets.Add("Invoice"); int startRow = 0; // Add Product Listing string startAddress = ""; string endAddress = ""; Sheet.Cell((startRow), 0).Value = "Item"; _AddAllBorders(Sheet.Cell(startRow, 0)); Sheet.Cell(startRow, 0).Font = new Font("Arial", 11, FontStyle.Bold); Sheet.Cell(startRow, 1).Value = "Quantity"; _AddAllBorders(Sheet.Cell(startRow, 1)); Sheet.Cell(startRow, 1).AlignmentHorizontal = Bytescout.Spreadsheet.Constants.AlignmentHorizontal.Right; Sheet.Cell(startRow, 1).Font = new Font("Arial", 11, FontStyle.Bold); Sheet.Cell(startRow, 2).Value = "Price"; _AddAllBorders(Sheet.Cell(startRow, 2)); Sheet.Cell(startRow, 2).AlignmentHorizontal = Bytescout.Spreadsheet.Constants.AlignmentHorizontal.Right; Sheet.Cell(startRow, 2).Font = new Font("Arial", 11, FontStyle.Bold); Sheet.Cell(startRow, 3).Value = "Total"; _AddAllBorders(Sheet.Cell(startRow, 3)); Sheet.Cell(startRow, 3).AlignmentHorizontal = Bytescout.Spreadsheet.Constants.AlignmentHorizontal.Right; Sheet.Cell(startRow, 3).Font = new Font("Arial", 11, FontStyle.Bold); for (int i = 0; i < lstProducts.Count; i++) { Sheet.Cell((++startRow), 0).Value = lstProducts[i].ProductName; _AddAllBorders(Sheet.Cell(startRow, 0)); Sheet.Cell(startRow, 1).Value = lstProducts[i].Quantity; Sheet.Cell(startRow, 1).AlignmentHorizontal = Bytescout.Spreadsheet.Constants.AlignmentHorizontal.Right; _AddAllBorders(Sheet.Cell(startRow, 1)); Sheet.Cell(startRow, 2).Value = lstProducts[i].Price; Sheet.Cell(startRow, 2).AlignmentHorizontal = Bytescout.Spreadsheet.Constants.AlignmentHorizontal.Right; _AddAllBorders(Sheet.Cell(startRow, 2)); // Calculated cell string formulaMultiplication = string.Format("={0}*{1}", Sheet.Cell(startRow, 1).GetAddress().ToString(), Sheet.Cell(startRow, 2).GetAddress().ToString()); Sheet.Cell(startRow, 3).Formula = formulaMultiplication; Sheet.Cell(startRow, 3).AlignmentHorizontal = Bytescout.Spreadsheet.Constants.AlignmentHorizontal.Right; _AddAllBorders(Sheet.Cell(startRow, 3)); // Address to be used for total sum if (i == 0) { startAddress = Sheet.Cell(startRow, 3).GetAddress().ToString(); } endAddress = Sheet.Cell(startRow, 3).GetAddress().ToString(); } Sheet.Cell((++startRow), 2).Value = "TOTAL"; Sheet.Cell(startRow, 2).Font = new Font("Arial", 11, FontStyle.Bold); Sheet.Cell(startRow, 2).AlignmentHorizontal = Bytescout.Spreadsheet.Constants.AlignmentHorizontal.Right; string formulaTotalSum = string.Format("=SUM({0}:{1})", startAddress, endAddress); Sheet.Cell(startRow, 3).Formula = formulaTotalSum; Sheet.Cell(startRow, 3).Font = new Font("Arial", 11, FontStyle.Bold); Sheet.Cell(startRow, 3).AlignmentHorizontal = Bytescout.Spreadsheet.Constants.AlignmentHorizontal.Right; // AutoFit all columns Sheet.Columns[0].AutoFit(); Sheet.Columns[1].AutoFit(); Sheet.Columns[2].AutoFit(); Sheet.Columns[3].AutoFit(); // Return all formatted document return document; } /// <summary> /// Add borders to cell /// </summary> private static void _AddAllBorders(Cell cell) { cell.LeftBorderStyle = Bytescout.Spreadsheet.Constants.LineStyle.Thin; cell.RightBorderStyle = Bytescout.Spreadsheet.Constants.LineStyle.Thin; cell.TopBorderStyle = Bytescout.Spreadsheet.Constants.LineStyle.Thin; cell.BottomBorderStyle = Bytescout.Spreadsheet.Constants.LineStyle.Thin; } } /// <summary> /// Invoice Product class /// </summary> public class InvoiceProduct { public string ProductName { get; set; } public int Quantity { get; set; } public decimal Price { get; set; } } }