如何将无节制转换为列表

Question

我正在构建此方法，该方法从表中返回值列表。

public IQueryable<RRSlotFiltriXDatiAggregatiElaborati> getTimeDomainTable(int idFiltri, int idTipoElaborazione)
        {
            return from f in dbData.RRSlotFiltriXDatiAggregatiElaborati
                   where f.IdRRSlotFiltri == idFiltri && f.idTipoElaborazione == idTipoElaborazione
                   select new RRSlotFiltriXDatiAggregatiElaborati
                   {
                       ID = f.ID,
                       IdRRSlotFiltri = f.IdRRSlotFiltri,
                       PHR_CCD_Units = (from u in dbData.PHR_CCD_Units
                                        where u.ID == f.idUm
                                        select new PHR_CCD_Units()
                                        {
                                            Code = u.Code,
                                            CodeSystem = u.CodeSystem,
                                            CodeSystemName = u.CodeSystemName
                                        }).FirstOrDefault(),
                       RRParametri = (from p in dbData.RRParametri
                                      where p.ID == f.idParametro
                                      select new RRParametri()
                                      {
                                         ID = p.ID,
                                         Descrizione = p.Descrizione
                                      }).FirstOrDefault(),
                       valore = f.valore
                   };
        }

现在，我想将此可疑对象列表。如果我尝试执行此行代码：

var iq = getTimeDomainTable(1, 1).toList();

我遇到此错误：

  

System.NotSupportedException：'实体或复杂类型'dbname.RRSlotFiltriXDatiAggregatiElaborati'不能在LINQ to Entities查询中构建。'

我该如何解决？