How to export the WinForms DataGrid (SfDataGrid) with RowHeader?

private void BtnExportExcel_Click(object sender, EventArgs e)
{
            var excelEngine = sfDataGrid.ExportToExcel(sfDataGrid.View, ExcelExportingOptions1());
            var workBook = excelEngine.Excel.Workbooks[0];
 
            IWorksheet sheet = workBook.Worksheets[0];
 
            sheet.InsertColumn(1, 1, ExcelInsertOptions.FormatDefault);
            var rowcount = this.sfDataGrid.RowCount;
 
            for (int i = 1; i < rowcount; i++)
            {
                sheet.Range["A" + (i + 1).ToString()].Number = (i - 1);
            }
 
            SaveFileDialog saveFilterDialog = new SaveFileDialog
            {
                FilterIndex = 2,
                Filter = "Excel 97 to 2003 Files(*.xls)|*.xls|Excel 2007 to 2010 Files(*.xlsx)|*.xlsx|Excel 2013 File(*.xlsx)|*.xlsx",
                FileName = "Sample1"
            };
 
            if (saveFilterDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                using (Stream stream = saveFilterDialog.OpenFile())
                {
                    if (saveFilterDialog.FilterIndex == 1)
                        workBook.Version = ExcelVersion.Excel97to2003;
                    else if (saveFilterDialog.FilterIndex == 2)
                        workBook.Version = ExcelVersion.Excel2016;
                    else
                        workBook.Version = ExcelVersion.Excel2013;
                    workBook.SaveAs(stream);
                }
 
                //Message box confirmation to view the created workbook.
                if (MessageBox.Show(this.sfDataGrid, "Do you want to view the workbook?", "Workbook has been created",
                                    MessageBoxButtons.YesNo, MessageBoxIcon.Information) == DialogResult.Yes)
                {
 
                    //Launching the Excel file using the default Application.[MS Excel Or Free ExcelViewer]
                    System.Diagnostics.Process.Start(saveFilterDialog.FileName);
                }
            }
}