public IActionResult GenerateKpcExcel(int id)
{
//id in this case is a business trip Id and it takes all pieces of this business trip
var pieces = _service.GetAll();
var excelName = _settings.Excel.KpcFileName;
var memoryStream = ExcelGenerator.GetKpcExcelMemoryStream(pieces, _env.WebRootPath, _settings.Excel.FolderName, excelName);
return(File(memoryStream, _excelFileType, excelName));
}