// 1. Create a new workbook and get the active worksheet IWorkbook workbook = Factory.GetWorkbook(); IWorksheet worksheet = workbook.Worksheets["Sheet1"]; worksheet.Name = "Sales Report";

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// 8. Auto-fit columns for readability worksheet.Cells["A:D"].Columns.AutoFit();

worksheet.Cells["A3"].Value = "Widget B"; worksheet.Cells["B3"].Value = 75; worksheet.Cells["C3"].Value = 24.50;

public void CreateSalesReport()

// 9. Save to file (no Excel installed required) workbook.SaveAs(@"C:\Reports\SalesReport.xlsx", FileFormat.OpenXMLWorkbook);

// 2. Define headers worksheet.Cells["A1"].Value = "Product"; worksheet.Cells["B1"].Value = "Units Sold"; worksheet.Cells["C1"].Value = "Unit Price"; worksheet.Cells["D1"].Value = "Total Revenue";