Help with Objects containing objects

[pdidow]

I have an Object, called boot. This boot contains two other objects - a headset and a shellset.

Each headset and shellset contains 1 head and 1 shell respectively.
My code is not working as expected....I really need some help on this one!

Here is the code for my Head/HeadSet

Option Explicit On
Public Class Head
    Inherits WQS_BusinessEntity.HeadSet
#Region "Private Variables"
    Private _iVesselID As Integer
    Private _iHeadID As Integer
    Private _iMaterialID As Integer
    Private _iLocationID As Integer
    Private _strMaterial As String
    Private _dDiameter As Double
    Private _dCurrentThickness As Double
    Private _dNominalThickness As Double

    Private _strShape As String
    Private _iShapeID As Integer
    Private _strLocation As String

#End Region

#Region "Constructors"
    Public Sub New()

    End Sub
    Public Sub New(ByVal iVesselID As Integer, ByVal iHeadID As Integer, ByVal iMaterialID As Integer, ByVal iLocationID As Integer, _
   ByVal strMaterial As String, ByVal dDiameter As Double, ByVal dCurrentThickness As Double, ByVal dNominalThickness As Double, ByVal strShape As String, ByVal iShapeID As Integer, ByVal strLocation As String)
        _iVesselID = iVesselID
        _iHeadID = iHeadID
        _iLocationID = iLocationID
        _strMaterial = strMaterial
        _dDiameter = dDiameter
        _dCurrentThickness = dCurrentThickness
        _dNominalThickness = dNominalThickness
        _iShapeID = iShapeID
        _strShape = strShape
        _strLocation = strLocation


    End Sub
#End Region

#Region "Public Properties"
    Public Property iVesselID() As Integer
        Get
            Return _iVesselID
        End Get
        Set(ByVal iValue As Integer)
            _iVesselID = iValue
        End Set
    End Property
    Public Property iHeadID() As Integer
        Get
            Return _iHeadID
        End Get
        Set(ByVal iValue As Integer)
            _iHeadID = iValue
        End Set
    End Property
    Public Property iShapeID() As Integer
        Get
            Return _iShapeID
        End Get
        Set(ByVal iValue As Integer)
            _iShapeID = iValue
        End Set
    End Property
    Public Property iLocationID() As Integer
        Get
            Return _iLocationID
        End Get
        Set(ByVal iValue As Integer)
            _iLocationID = iValue
        End Set
    End Property

    Public Property iMaterialID() As Integer
        Get
            Return _iMaterialID
        End Get
        Set(ByVal iValue As Integer)
            _iMaterialID = iValue
        End Set
    End Property

    Public Property strMaterial() As String
        Get
            Return _strMaterial
        End Get
        Set(ByVal strValue As String)
            _strMaterial = strValue
        End Set
    End Property

    Public Property dDiameter() As Double
        Get
            Return _dDiameter
        End Get
        Set(ByVal dValue As Double)
            _dDiameter = dValue
        End Set
    End Property

    Public Property dCurrentThickness() As Double
        Get
            Return _dCurrentThickness
        End Get
        Set(ByVal dValue As Double)
            _dCurrentThickness = dValue

        End Set
    End Property

    Public Property dNominalThickness() As Double
        Get
            Return _dNominalThickness
        End Get
        Set(ByVal dValue As Double)
            _dNominalThickness = dValue

        End Set
    End Property

    Public Property strShape() As String
        Get
            Return _strShape
        End Get
        Set(ByVal strValue As String)
            _strShape = strValue
        End Set
    End Property

    Public Property strLocation() As String
        Get
            Return _strLocation
        End Get
        Set(ByVal strValue As String)
            _strLocation = strValue
        End Set
    End Property







#End Region

End Class
Public Class HeadSet
    Inherits Collections.ArrayList

    Public Shadows Function Add(ByVal oValue As Head) As Integer
        If Not oValue Is Nothing Then
            MyBase.Add(oValue)
        End If
    End Function

    Default Public Shadows Property Item(ByVal iIndex As Integer) As Head
        Get
            Return CType(MyBase.Item(iIndex), Head)

        End Get
        Set(ByVal Value As Head)
            MyBase.Item(iIndex) = Value
        End Set
    End Property

End Class

...And here is the code containing the Shells

Option Explicit On
Public Class Shell
    Inherits WQS_BusinessEntity.ShellSet

#Region "Private Variables"
    Private _iVesselID As Integer
    Private _iShellID As Integer
    Private _iMaterialID As Integer
    Private _strMaterial As String
    Private _dDiameter As Double
    Private _dCurrentThickness As Double
    Private _dNominalThickness As Double
    Private _cOrientation As Char


#End Region

#Region "Constructors"
    Public Sub New()

    End Sub
    Public Sub New(ByVal iVesselID As Integer, ByVal iShellID As Integer, ByVal iMaterialID As Integer, _
   ByVal strMaterial As String, ByVal dDiameter As Double, ByVal dCurrentThickness As Double, _
   ByVal dNominalThickness As Double, ByVal cOrientation As Char)
        _iVesselID = iVesselID
        _iShellID = iShellID
        _iMaterialID = iMaterialID
        _strMaterial = strMaterial
        _dDiameter = dDiameter
        _dCurrentThickness = dCurrentThickness
        _dNominalThickness = dNominalThickness
        _cOrientation = cOrientation


    End Sub
#End Region



#Region "Public Properties"
    Public Property iVesselID() As Integer
        Get
            Return _iVesselID
        End Get
        Set(ByVal iValue As Integer)
            _iVesselID = iValue
        End Set
    End Property
    Public Property iShellID() As Integer
        Get
            Return _iShellID
        End Get
        Set(ByVal iValue As Integer)
            _iShellID = iValue
        End Set
    End Property

    Public Property iMaterialID() As Integer
        Get
            Return _iMaterialID
        End Get
        Set(ByVal iValue As Integer)
            _iMaterialID = iValue
        End Set
    End Property

    Public Property strMaterial() As String
        Get
            Return _strMaterial
        End Get
        Set(ByVal strValue As String)
            _strMaterial = strValue
        End Set
    End Property

    Public Property dDiameter() As Double
        Get
            Return _dDiameter
        End Get
        Set(ByVal dValue As Double)
            _dDiameter = dValue
        End Set
    End Property

    Public Property dCurrentThickness() As Double
        Get
            Return _dCurrentThickness
        End Get
        Set(ByVal dValue As Double)
            _dCurrentThickness = dValue

        End Set
    End Property

    Public Property dNominalThickness() As Double
        Get
            Return _dNominalThickness
        End Get
        Set(ByVal dValue As Double)
            _dNominalThickness = dValue

        End Set
    End Property

    Public Property cOrientation() As Char
        Get
            Return _cOrientation
        End Get
        Set(ByVal chValue As Char)
            _cOrientation = chValue
        End Set
    End Property

#End Region
End Class


Public Class ShellSet
    Inherits Collections.ArrayList

    Public Shadows Function Add(ByVal oValue As Shell) As Integer
        If Not oValue Is Nothing Then
            MyBase.Add(oValue)
        End If
    End Function

    Default Public Shadows Property Item(ByVal iIndex As Integer) As Shell
        Get
            Return CType(MyBase.Item(iIndex), Shell)

        End Get
        Set(ByVal Value As Shell)
            MyBase.Item(iIndex) = Value
        End Set
    End Property

End Class

Both of these live in the Business Entity layer.

I am encountering the difficult in my DataAccess Layer.
Here is the code DataSet to BootSet from the BootDAL:

Private Function DataSetToBootSet(ByVal oDS As DataSet) As WQS_BusinessEntity.BootSet

        Dim oRow As DataRow
        Dim oSet As New WQS_BusinessEntity.BootSet
        Dim iCount As Integer = 0
        'Dim iTable As Integer
        'iTable = oDS.Tables.Count - 1
        For Each oRow In oDS.Tables(1).Rows
            Dim oItem As New WQS_BusinessEntity.Boot

           

            With oItem
                'Add a Shell and a Head to the Boot's Head and Shell Sets
                'oItem.oShellSet.Add(New WQS_BusinessEntity.Shell)
                'oItem.oHeadSet.Add(New WQS_BusinessEntity.Head)
                'Boot Data
                .iBootID = oDS.Tables(0).Rows(iCount).Item("BootID")
                .iBootTypeID = oDS.Tables(1).Rows(iCount).Item("BootFunctionTypeId")
                .iVesselID = oDS.Tables(1).Rows(iCount).Item("VesselId")
                '1 head, 1 shell per boot now.

                'Head Data
                oItem.oHeadSet.Item(0).iHeadID = ZeroIfNull(oDS.Tables(1).Rows(iCount).Item("HeadId"))
                oItem.oHeadSet.Item(0).iVesselID = ZeroIfNull(oDS.Tables(1).Rows(iCount).Item("VesselId"))
                oItem.oHeadSet.Item(0).iMaterialID = ZeroIfNull(oDS.Tables(1).Rows(iCount).Item("HeadMaterialId"))
                oItem.oHeadSet.Item(0).iLocationID = ZeroIfNull(oDS.Tables(1).Rows(iCount).Item("HeadLocationId"))
                oItem.oHeadSet.Item(0).strMaterial = oDS.Tables(1).Rows(iCount).Item("HeadMaterialName")
                oItem.oHeadSet.Item(0).dDiameter = ZeroIfNull(oDS.Tables(1).Rows(iCount).Item("HeadDiameter"))
                oItem.oHeadSet.Item(0).dCurrentThickness = ZeroIfNull(oDS.Tables(1).Rows(iCount).Item("HeadCurrentThickness"))
                oItem.oHeadSet.Item(0).dNominalThickness = ZeroIfNull(oDS.Tables(1).Rows(iCount).Item("HeadNominalThickness"))
                oItem.oHeadSet.Item(0).strShape = oDS.Tables(1).Rows(iCount).Item("HeadShapeName")
                oItem.oHeadSet.Item(0).iShapeID = ZeroIfNull(oDS.Tables(1).Rows(iCount).Item("HeadShapeId"))
                oItem.oHeadSet.Item(0).strLocation = EmptyIfNull(oDS.Tables(1).Rows(iCount).Item("HeadLocationOnVesselName"))
                'Shell(Data)
                oItem.oShellSet.Item(0).iShellID = ZeroIfNull(oDS.Tables(1).Rows(iCount).Item("ShellId"))
                oItem.oShellSet.Item(0).iVesselID = ZeroIfNull(oDS.Tables(1).Rows(iCount).Item("VesselId"))
                oItem.oShellSet.Item(0).iMaterialID = ZeroIfNull(oDS.Tables(1).Rows(iCount).Item("ShellMaterialId"))
                oItem.oShellSet.Item(0).strMaterial = EmptyIfNull(oDS.Tables(1).Rows(iCount).Item("ShellMaterialName"))
                oItem.oShellSet.Item(0).dDiameter = ZeroIfNull(oDS.Tables(1).Rows(iCount).Item("ShellDiameter"))
                oItem.oShellSet.Item(0).dCurrentThickness = ZeroIfNull(oDS.Tables(1).Rows(iCount).Item("ShellCurrentThickness"))
                oItem.oShellSet.Item(0).dNominalThickness = ZeroIfNull(oDS.Tables(1).Rows(iCount).Item("ShellNominalThickness"))
                Select Case oDS.Tables(1).Rows(iCount).Item("ShellOrientation")
                    Case 0.0
                        oItem.oShellSet.Item(0).cOrientation = "H"
                    Case 90.0
                        oItem.oShellSet.Item(0).cOrientation = "V"
                    Case Else
                        'default to horizontal
                        oItem.oShellSet.Item(0).cOrientation = "H"
                End Select

            End With
            'Add the Boot to the BootSet
            oSet.Add(oItem)
            iCount = iCount + 1

        Next

        Return oSet
    End Function

The code does not throw an error. But when I put a watch on oSet (the returned BootSet Object) I get what you see in the attached screenshot. I need to be able to access the Head and Shell Data, which I dont see ...this data is used to populate a gridview on the presentation layer. Please Help!