C# AutoMapper 2.1.267.0不映射简单int？财产

我有以下课程

资料来源：

public class NewBusinessSubmission
{
    //other properties      
    public int? TermTypeId { get; set; }

}

目的地：

NewBusinessSubmission类继承自如下所示的PolicyTransaction类（是的，它是VB.NET）：

关于此属性未正确映射的原因，您有什么想法吗

---

谢谢。

您使用的是哪个版本的AutoMapper？更新了问题标题。我使用的是2.1.267.0

<System.Serializable()> Public MustInherit Class PolicyTransaction
    Inherits Framework2.BusinessBase(Of PolicyTransaction)
    Implements IDisposable

  ...........

Public Property TermTypeId() As Nullable(Of Integer)
    Get
        CanReadProperty(True)
        If Not _PolicyTermsDataRow.IsTermTypeIdNull Then
            Return Me._PolicyTermsDataRow.TermTypeId
        End If
    End Get
    Set(ByVal value As Nullable(Of Integer))
        If Nullable(Of Integer).Equals(value, Me.TermTypeId) Then Exit Property
        CanWriteProperty(True)
        If value.HasValue Then
            Me._PolicyTermsDataRow.TermTypeId = value.Value
        Else
            Me._PolicyTermsDataRow.SetTermTypeIdNull()
        End If
        AfterTermTypeIdChanged()
        Me.PropertyHasChanged()
    End Set
End Property
  ...........


End Class

    Mapper.CreateMap<NewBusinessSubmission, NewBusiness>()
        .ForMember(x => x.PolicyTxnNum, opt => opt.Ignore())
        .ForMember(x => x.ContactProducerLicId, opt => opt.Ignore())
        .ForMember(x => x.PolicyNames, opt => opt.Ignore())
        .ForMember(x => x.PolicyExp, opt => opt.Ignore());

    Mapper.CreateMap<NewBusinessSubmission, NewBusiness>()
        .ForMember(x => x.PolicyTxnNum, opt => opt.Ignore())
        .ForMember(x => x.ContactProducerLicId, opt => opt.Ignore())
        .ForMember(x => x.PolicyNames, opt => opt.Ignore())
        .ForMember(x => x.PolicyExp, opt => opt.Ignore())
        .ForMember(x => x.TermTypeId, opt => opt.MapFrom(x => x.TermTypeId));

        var newBusiness = Mapper.Map<NewBusinessSubmission, NewBusiness>(newBusinessSubmission);

        newBusinessInstance.TermTypeId = newBusinessSubmissionInstance.TermTypeId;