实体类型不是当前上下文的模型的一部分-DBFirst

我有一个查询,它选择了 subrep

Public Async Function ReturnSubRepsAsync(user As BaseUser) As Task(Of IList(Of SubRep)) Implements IGeneralAccountManagementRepository.ReturnSubRepsAsync
        'The entity type SubRep is not part of the model for the current context.
        Using webDataDBContext As New WebDataEntities()
            'So here it just has an SQL query which it will execute when requested
            Dim subReps = webDataDBContext.Subreps.Where(Function(x) x.CID = user.CID)

            If (String.IsNullOrEmpty(user.Password) = False) Then
                'Add another where onto the SQL query
                subReps = subReps.Where(Function(x) x.HASH_PASSWORD = user.PasswordHash)
            End If

            If (String.IsNullOrEmpty(user.Username) = False) Then
                'Add another where onto the SQL query
                subReps = subReps.Where(Function(x) x.username = user.Username)
            End If

            'Execute the query
            Return Await subReps.ToListAsync()
        End Using
    End Function

现在由于实体框架数据库不包括验证,例如 MaxLength 关于字符串,我决定遵循本教程: https://docs.microsoft.com/en-us/aspnet/mvc/overview/getting-started/database-first-development/enhancing-data-validation

并添加另一个使用 MetaDataType

我的实体框架生成的类如下所示:

Partial Public Class Subrep
    Public Property id As Integer
    Public Property CID As String
    Public Property username As String
    Public Property LastName As String
    Public Property FirstName As String
    Public Property MIddleInitial As String
    Public Property Address As String
    Public Property Address2 As String
    Public Property City As String
    Public Property State As String
    Public Property Zip As String
    Public Property HomePhone As String
    Public Property EmailAddress As String
    Public Property InActive As String
    Public Property CellPhone As String
    Public Property StartDate As String
    Public Property AuditName As String
    Public Property Background As String
    Public Property FDCPA As String
    Public Property Choicepoint As String
    Public Property Badge As String
    Public Property ConfAgree As String
    Public Property NCCI_OK As String
    Public Property InactiveRepNo As String
    Public Property Approved As String
    Public Property DateApproved As String
    Public Property Denied As String
    Public Property DateDenied As String
    Public Property DeniedNotes As String
    Public Property DOB As String
    Public Property SSN As String
    Public Property MegansLaw As String
    Public Property MASTER As String
    Public Property VACATION As String
    Public Property FC_DEFAULT_FEE As Nullable(Of Decimal)
    Public Property LM_DEFAULT_FEE As Nullable(Of Decimal)
    Public Property MAS90 As String
    Public Property SOS As String
    Public Property HASH_PASSWORD As String
    Public Property changepass As String
    Public Property NOTIFICATION_OFF As String
    Public Property Capacity As String
    Public Property internalqc As String
    Public Property New_Rep As String
    Public Property Stand_By As String
    Public Property Vacation_Start_date As Nullable(Of Date)
    Public Property Vacation_End_date As Nullable(Of Date)
    Public Property sub_coreIP As String
    Public Property rating As String
    Public Property date_last_updated As Nullable(Of Date)

End Class

我的单独部分类应该用于验证,如下所示:

Partial Public Class SubRep
End Class

因此,即使它是空的,我也会在标题中列出错误。我已经很好地处理了多个实体。