/// <summary>
/// The method creats XLSX file with all products, save it on server and returns it to client
/// </summary>
/// <returns>The XLSX (MS Exel) file with all products</returns>
public FileResult ExportToExel()
{
TransferData export = new TransferData();
string filePath = Server.MapPath("~/Content/documents/Catalog.xlsx");
string fileType = "xlsx";
string fileName = "Catalog.xlsx";
export.ExportToXLSX(productService.GetAllElements(), filePath);
return(File(filePath, fileType, fileName));
}