Spreadsheetgear Example May 2026

// 7. Format currency column worksheet.Cells["C2:C3"].NumberFormat = "$#,##0.00"; worksheet.Cells["D2:D5"].NumberFormat = "$#,##0.00";

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

For .NET developers, programmatically creating, reading, or modifying Excel files often feels like a high-wire act. You can use Microsoft’s Office Interop—but that requires Excel to be installed, is notoriously slow, unstable in server environments, and expensive to license. Enter SpreadsheetGear : a high-performance, server-friendly .NET library that reads, writes, and renders Excel workbooks without Microsoft Excel. worksheet.Cells["D2:D5"].NumberFormat = "$#

public void CreateSalesReport()