public IHttpActionResult FetchEssentialData(Guid?processInstanceId = null)
{
ParameterEssentialDataDto dto = new ParameterEssentialDataDto();
dto.AlarmList = _alarmService.Fetch <Alarm>(null, null, null).Select(e => Mapper.Map <Alarm, AlarmDetailDto>(e)).ToList();
dto.DeviceList = _deviceService.FetchWithoutProcessInstanceId(processInstanceId, null, null).Select(e => Mapper.Map <Device, DeviceDetailDto>(e)).ToList();
dto.FrequencyTypeList = Enum.GetValues(typeof(FrequencyType))
.Cast <FrequencyType>()
.Select(item => new ItemDto <FrequencyType?>
{
Description = item.GetDescription(),
Text = item.ToString(),
Id = item
}).ToList();
return(Ok(dto));
}