Gembox.spreadsheet.dll -

// 4. Style the header var headerStyle = new CellStyle

using (var reader = ExcelFile.LoadXlsx("hugefile.xlsx", new XlsxLoadOptions ReadDataOnly = true )) gembox.spreadsheet.dll

// Populate data for (int i = 1; i <= 10; i++) gembox.spreadsheet.dll

Here is a complete example demonstrating the core capabilities of the library. gembox.spreadsheet.dll

High-fidelity conversion between spreadsheet formats (e.g., XLS to PDF or XLSX to HTML) Reporting: