Excel 2007-2025 Open XML (*.xlsx) SpreadsheetGear API Sample

// Create a new workbook and some local variables for convenience.
SpreadsheetGear.IWorkbook workbook = SpreadsheetGear.Factory.GetWorkbook();
SpreadsheetGear.IWorksheet worksheet = workbook.Worksheets["Sheet1"];
SpreadsheetGear.IRange cells = worksheet.Cells;

// Rename the worksheet.
worksheet.Name = "My Worksheet";

// Add some cell data.
cells["A1"].Value = "Hello World!";

// Save to Excel 2007 and later compatible Open XML (*.xlsx) file.
workbook.SaveAs(@"c:\path\to\workbook.xlsx", 
    SpreadsheetGear.FileFormat.OpenXMLWorkbook);