using System;
using System.Collections.Generic;
using System.Text;
using Bytescout.XLS;

namespace Changing_data_in_existing_XLS
{
class Program
{
static void Main(string[] args)
{
// Open XLSDocument
XLSDocument document = new XLSDocument("AdvancedReport.xls");
// Get Worksheet
Worksheet worksheet = document.WorkBook.Worksheets[0];
// Set cell value
worksheet.Cell(1, 1).Value = "Homer Jay Simpson 2";
// Save document
document.SaveAs("AdvancedReport1.xls");
// Close XLSDocument
document.Close();
}
}
}

Download example source code: bytescoutxls_changing_data_in_existing_xls.zip (8 KB)