Question

我使用的是LINQ to SQL datacontext，它有一个Sample实体，Sample实体有一个子实体集Drums。我已经在Sample partial class中编写了这段代码来处理添加新鼓：

Partial Class Sample

Public Sub New(ByVal limsNumber As String, ByVal lotNumber As String, ByVal createDate As Date)
    Me.New()
    Me.LIMSNum = limsNumber
    Me.LotNum = lotNumber
    Me.DateReceived = createDate

End Sub

Public Sub AddDrum()
    Me.Drums.Add(New Drum With {.DrumNum = Me.Drums.Count + 1})
End Sub

Public Sub AddDrum(ByVal palletNum As Integer, ByVal grossWeight As Integer, ByVal tareWeight As Integer)
    AddDrum(New Drum With {.GrossWeight = grossWeight, .TareWeight = tareWeight, .PalletNum = palletNum})
End Sub

Public Sub AddDrum(ByVal thisDrum As Drum)
    If Me.Drums Is Nothing OrElse Me.Drums.Count = 0 Then
        thisDrum.DrumNum = 1
    Else
        thisDrum.DrumNum = Me.Drums.Max(Function(d) CInt(d.DrumNum)) + 1
    End If
    thisDrum.DateEntered = Now
    Me.Drums.Add(thisDrum)
End Sub

在WinForm中，我有SampleBindingSource和DrumsBindingSource，它有SampleBindingSource作为数据源，“Drums”作为DataMember。如果我调用第二个AddDrum重载，则Sample实例中的Drums实体集将增加1，SampleBindingSource的Drums成员也会增加。但是，DrumsBindingSource中不会发生此更改。

我已经为SampleBindingSource和DrumsBindingSource尝试了ResetBindings（false和true）和EndEdit。似乎没有任何东西导致DrumsBindingSource中发生更改。

我该如何解决这个问题？

Answer 1

我发布了一个类似问题的答案：

Child bindingsource bound to child entityset does not update

父绑定源中的更改未显示在子绑定源中

1 个答案: