linq一堆多再对多

查出来0条

        public async Task<PagedResultDto<ProFileListDto>> GetAll(ProFileListInput input)
        {
            var query = from a in _proFileRepository.GetAll()
                        join b in _filingAgreementRepository.GetAll() on a.Id equals b.ProFileId into list
                        from c in list.DefaultIfEmpty()
                        join d in _filesRepository.GetAll() on c.PdfFileUrlId equals d.Id
                        where (string.IsNullOrEmpty(input.Name) || a.Name == input.Name) &&
                              (!input.GraduationTime.HasValue || a.GraduationTime.Year == input.GraduationTime.Value) &&
                              (!input.Birthday.HasValue || a.Birthday.Value.Year == input.Birthday.Value.Year
                                                             && a.Birthday.Value.Month == input.Birthday.Value.Month) &&
                              (string.IsNullOrEmpty(input.IdCard) || a.IdCard == input.IdCard) &&
                              (!input.ProFileState.HasValue || a.ProFileState == input.ProFileState) &&
                              (!input.ProFileType.HasValue || a.ProFileType == input.ProFileType) &&
                              (string.IsNullOrEmpty(input.GraduatedSchool) || a.GraduatedSchool == input.GraduatedSchool)
                        select new { a, url=d==null?"":d.FliePath };



            var count = await query.CountAsync();
            var items = await query.OrderBy(input.Sorting).PageBy(input).ToListAsync();

            return new PagedResultDto<ProFileListDto>(
                count,
                items.Select(item =>
                {
                    var dto = ObjectMapper.Map<ProFileListDto>(item.a);
                    //if (item.c != null)
                    //{
                    //    dto.FilingAgreementFileUrl = ( _filesRepository.Get(item.c.PdfFileUrlId)).FliePath;
                    //}
                    dto.FilingAgreementFileUrl = item.url;
                    return dto;
                }).ToList());
        }

正常

       public async Task<PagedResultDto<ProFileListDto>> GetAll(ProFileListInput input)
        {
            var query = from a in _proFileRepository.GetAll()
                        join b in _filingAgreementRepository.GetAll() on a.Id equals b.ProFileId into list
                        from c in list.DefaultIfEmpty()
                        join d in _filesRepository.GetAll() on c.PdfFileUrlId equals d.Id into list2
                        from e in list2.DefaultIfEmpty()
                        where (string.IsNullOrEmpty(input.Name) || a.Name == input.Name) &&
                              (!input.GraduationTime.HasValue || a.GraduationTime.Year == input.GraduationTime.Value) &&
                              (!input.Birthday.HasValue || a.Birthday.Value.Year == input.Birthday.Value.Year
                                                             && a.Birthday.Value.Month == input.Birthday.Value.Month) &&
                              (string.IsNullOrEmpty(input.IdCard) || a.IdCard == input.IdCard) &&
                              (!input.ProFileState.HasValue || a.ProFileState == input.ProFileState) &&
                              (!input.ProFileType.HasValue || a.ProFileType == input.ProFileType) &&
                              (string.IsNullOrEmpty(input.GraduatedSchool) || a.GraduatedSchool == input.GraduatedSchool)
                        select new { a, url = e == null ? "" : e.FliePath };
            


            var count = await query.CountAsync();
            var items = await query.OrderBy(input.Sorting).PageBy(input).ToListAsync();

            return new PagedResultDto<ProFileListDto>(
                count,
                items.Select(item =>
                {
                    var dto = ObjectMapper.Map<ProFileListDto>(item.a);
                    //if (item.c != null)
                    //{
                    //    dto.FilingAgreementFileUrl = (_filesRepository.Get(item.c.PdfFileUrlId)).FliePath;
                    //}
                    dto.FilingAgreementFileUrl = item.url;
                    return dto;
                }).ToList());
        }