Aspose.Cells create excel from a list of object

public static void CreateXls(IList<ExportItem> exportItems, string file)
{
    var workbook = new Workbook();
    Worksheet worksheet = workbook.Worksheets[0];
    Cells cells = worksheet.Cells;
    cells.ImportCustomObjects(new Collection<ExportItem>(exportItems),
        new[] { "ExportCode", "Topic", "Title", "Name", "LastName", "Email", "NewFileName", "NewLicenseAgreement" },
        true, 0, 0, exportItems.Count, true, "dd/MM/yyyy HH:mm", false);
    worksheet.AutoFitColumns();
    workbook.Save(file, SaveFormat.Excel97To2003);
}