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嗨，我正在尝试在 CRM 2011 中加入多个实体，但我收到错误消息：{“'xrmsm_sessionEnrollments' 实体不包含名称 = 'xrmsm_termsid'.”的属性。”}。这是正确的，但我正在加入具有该属性的实体。

我的 Linq 查询：

var query2 = from e in svsContext.xrmsm_sessionEnrollmentsSet 

        join s in svsContext.xrmsm_sessionsSet on e.xrmsm_SessionLookup.Id equals s.xrmsm_sessionsId
        join ic in svsContext.xrmsm_institutionCoursesSet on s.xrmsm_institutionCourseLookup.Id equals ic.xrmsm_institutionCoursesId
        join ts in svsContext.xrmsm_term_sessionsSet on e.xrmsm_termSessionLookup.Id equals ts.xrmsm_term_sessionsId
        join t in svsContext.xrmsm_termsSet on ts.xrmsm_TermLookup.Id equals t.xrmsm_termsId
        where (e.xrmsm_StudentLookup.Equals(studentlookup)
               && e.xrmsm_YearLookup.Equals(entity.GetAttributeValue("xrmsm_studentlookup"))
               && ic.xrmsm_institutionCoursesId == institutionCourseGuid
               && t.xrmsm_termsId == termGuid)
        select new { sessionName = s.xrmsm_sessionsName, StudentName = e.xrmsm_studentsName, StudentId = e.xrmsm_StudentLookup.Name };

我在 SQL Server 上工作的原始 SQL 查询：

SELECT en.xrmsm_currentsessionenrollmentsname
      ,en.xrmsm_isreadonlyname
      ,en.xrmsm_sessionenrollmentsaverage
      ,en.xrmsm_sessionenrollmentsgrade
      ,en.xrmsm_sessionenrollmentsid
      ,en.xrmsm_sessionenrollments_id
      ,en.xrmsm_sessionlookup as sessionid
      ,en.xrmsm_sessionlookupname
      ,en.xrmsm_sessionsname
      ,en.xrmsm_studentlookup AS studentid
      ,en.xrmsm_studentlookupname
      ,en.xrmsm_studentsname
      ,en.xrmsm_termsessionlookup
      ,en.xrmsm_termsessionlookupname
      ,en.xrmsm_withdrawal
      ,en.xrmsm_yearaverage
      ,en.xrmsm_yeargrade
      ,en.xrmsm_yearlookup
      ,en.xrmsm_yearlookupname
  FROM CoseyTest_MSCRM.dbo.Filteredxrmsm_sessionEnrollments as en INNER JOIN 
  CoseyTest_MSCRM.dbo.Filteredxrmsm_sessions crmsessions ON 
  (en.xrmsm_sessionlookup = crmsessions.xrmsm_sessionsid AND en.xrmsm_yearlookup = crmsessions.xrmsm_yearlookup)
  INNER JOIN Filteredxrmsm_institutionCourses institutionCourses
  on crmsessions.xrmsm_institutioncourselookup = institutionCourses.xrmsm_institutioncoursesid
  Inner Join Filteredxrmsm_term_sessions as termsession
  on en.xrmsm_termsessionlookup = termsession.xrmsm_term_sessionsid
  Inner Join Filteredxrmsm_terms as terms
  on termsession.xrmsm_termlookup = terms.xrmsm_termsid 
  where en.xrmsm_yearlookup = '4BA07BED-3F51-E211-8359-00155D004403' 
  and en.xrmsm_studentlookup = 'C844AF65-5B51-E211-8359-00155D004403'
  and terms.xrmsm_termsid = 'D1D107B7-4551-E211-8359-00155D004403' 
  and institutionCourses.xrmsm_institutioncoursesid = '2121914E-4551-E211-8359-00155D004403'
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3 回答 3

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CRM 的 Linq 提供程序有一些限制。你可以在这里找到它。检查您的查询是否违反限制。

于 2013-03-22T10:14:47.987 回答
1

尝试查看它正在生成的实际查询并在 SQL 中运行它，它可能有助于了解正在发生的事情。

可能是您在 LINQ 中所做的某些事情在 CRM 中不可用，正如 paramosh 所提到的，但我看不到任何让我兴奋的东西。

于 2013-03-22T10:39:34.240 回答
1

感谢您的所有回复。我做了以下解决方法。

  1. 进行查询以检索所有学生注册的列表

  2. 使用List<T>类的 Find 方法来查找是否存在符合我正在搜索的条件的记录。

     var query2 = (from e in svsContext.xrmsm_sessionEnrollmentsSet
                 join s in svsContext.xrmsm_sessionsSet on e.xrmsm_SessionLookup.Id equals s.xrmsm_sessionsId
                 join ic in svsContext.xrmsm_institutionCoursesSet on s.xrmsm_institutionCourseLookup.Id equals ic.xrmsm_institutionCoursesId
                 join ts in svsContext.xrmsm_term_sessionsSet on e.xrmsm_termSessionLookup.Id equals ts.xrmsm_term_sessionsId
                 join t in svsContext.xrmsm_termsSet on ts.xrmsm_TermLookup.Id equals t.xrmsm_termsId
                 where (e.xrmsm_StudentLookup.Equals(studentlookup))
                 select new
                 {
                     EnrollmentId = e.xrmsm_sessionEnrollments_id,
                     SessionId = s.xrmsm_sessions_id,
                     EnrollmentYear = e.xrmsm_YearLookup,
                     InstitutionCourseId = (Guid)ic.xrmsm_institutionCoursesId,
                     TermId = (Guid)t.xrmsm_termsId,
                     Student = e.xrmsm_StudentLookup
                 }).ToList();


    var q = query2.Find(r => r.EnrollmentYear.Id == entity.GetAttributeValue<EntityReference>("xrmsm_yearlookup").Id
                         && r.InstitutionCourseId == institutionCourseGuid
                         && r.TermId == termGuid);
于 2013-03-28T23:42:06.907 回答