请问如何在明细表 不加载的时候获取到 明细表 中的数据，生成到其 他表中？目前只能加载后才能获取到

If e.DataCol.Name = "卷号" Then
    Dim nms() As String = {"品名","厚度","宽度","规格","牌号","产地"}
    If e.NewValue Is Nothing Then
        For Each nm As String In nms
            e.DataRow(nm) = Nothing
        Next
    Else
        Dim dr As DataRow
        dr = DataTables("明细表").Find("[卷号] = \'" & e.NewValue & "\'")
        If dr IsNot Nothing
            For Each nm As String In nms
                e.DataRow(nm) = dr(nm)
            Next
        End If
    End If
End If