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我正在接收在我的RosterSummaryData_Subject_Local实体上执行linq查询时列出的错误。我似乎无法弄清楚什么是错误或解决方案。LINQ to entity错误:“无法创建类型为''System.Int32 []”的空常量值。只有实体类型,枚举类型
Unable to create a null constant value of type 'System.Int32[]'. Only entity types, enumeration types or primitive types are supported in this context.
我在我的代码第一实体上下文LINQ查询:
var subjLocal = customerContext.RosterSummaryData_Subject_Local.Where(s =>
(s.fkRosterSetID == 0) &&
(statsInfo.TestInstanceIDsList.Contains(s.fkTestInstanceID)) &&
(s.fkTestTypeID == statsInfo.TestTypeID) &&
(statsInfo.SchoolYearIDsList.Contains(s.fkSchoolYearID)) &&
(s.fkRosterTypeID == 1) &&
(s.fkSchoolID == 0) &&
(s.fkDepartmentID == 1) &&
(s.fkCourseID == 1) &&
(s.fkPeriodID == 1) &&
(statsInfo.DemoCatIDsList.Contains(s.fkDemoCommonCategoryID)) &&
(statsInfo.DemoCodeIDsList.Contains(s.fkDemoCommonCodeID)) &&
(statsInfo.TestSubjectIDsList.Contains(s.fkTest_SubjectID)));
您确定所有的列表都是非空吗? (即'TestInstanceIDsList') – 2014-11-21 00:16:07
@KirkWoll哦,这个人很尴尬。感谢那个地方。其中一个列表为空,我认为它们已正确通过。解决了这个问题,谢谢 – frontin 2014-11-21 00:28:14
EF错误消息通常会有很多不足之处。 :) – 2014-11-21 00:29:37