Question

    Public Function GetSubjectList(ci As CultureInfo, EACode As String) As IEnumerable(Of SelectListItem)
        Dim items

        Dim innerQuery = (From c In _context.TblSchoolDatas
                         Where c.EACODE = EACode And c.AnalystedStudents >= 10
                         Select (c.SubjectID)).Distinct()

        items = From s In _context.TblSubjects
                        Where innerQuery.Contains(s.SubjectID)
                        Order By s.Ordering
                        Select New SelectListItem With {.Text = s.ShortNameE, .Value = s.SubjectID}

        **items.Insert(0, New SelectListItem() With {.Text = "All", .Value = "All"})**

        Return items

    End Function

找不到类型'DbQuery（Of SelectListItem）'上的公共成员'插入'。 错误以粗体显示，谢谢

还有一个调试屏幕，供您参考

http://i.imgur.com/GsX1NqP.png

Answer 1

您正在尝试插入LINQ表达式。试试

items.ToList();

之前

items.Insert()

当我向SelectListItem添加一个项目时，ASP.NET MVC出错

1 个答案: