Help with binding gridview to an object containing a collection of objects

This is a followup question to one I posted a couple of weeks ago. I have an Object (bootset), which I want to bind to my gridview. It contains 2 sets of chilld objects, which i must access. Here is the Boot/Bootset classes:

Code:

---

Option Explicit On
Public Class Boot
    'Contains a head and shell
#Region "Private Variables"
    Private _oHeadSet As New HeadSet
    Private _oShellSet As New ShellSet
    Private _iBootID As Integer
#End Region

#Region "Constructors"
    Public Sub New()
        _oHeadSet = New WQS_BusinessEntity.HeadSet
        Dim oHead As New Head
        _oHeadSet.Add(oHead)
        _oShellSet = New WQS_BusinessEntity.ShellSet
        Dim oShell As New Shell
        _oShellSet.Add(oShell)


    End Sub
    Public Sub New(ByVal oHeadSet As HeadSet, ByVal oShellSet As ShellSet, ByVal iBootID As Integer, ByVal iBootTypeID As Integer, ByVal iVesselID As Integer)
        _oHeadSet = New WQS_BusinessEntity.HeadSet
        _oShellSet = New WQS_BusinessEntity.ShellSet
        Dim oHead As New Head
        Dim oShell As New Shell
        _oHeadSet.Add(oHead)
        _oShellSet.Add(oShell)
        _iBootID = iBootID
     
    End Sub
#End Region

#Region "Public Properties"
    Public Property oHeadSet() As WQS_BusinessEntity.HeadSet
        Get
            Return _oHeadSet
        End Get
        Set(ByVal oValue As HeadSet)
            _oHeadSet = oValue
        End Set
    End Property

    Public Property oShellSet() As WQS_BusinessEntity.ShellSet
        Get
            Return _oShellSet
        End Get
        Set(ByVal oValue As ShellSet)
            _oShellSet = oValue
        End Set
    End Property

    Public Property iBootID() As Integer
        Get
            Return _iBootID
        End Get
        Set(ByVal iValue As Integer)
            _iBootID = iValue
        End Set
    End Property
 #End Region
End Class


Public Class BootSet
    Inherits Collections.ArrayList

    Public Shadows Function Add(ByVal oValue As Boot) 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 Boot
        Get
            Return CType(MyBase.Item(iIndex), Boot)

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

End Class

---

And the Head/HeadSet Classes:

Code:

---

Option Explicit On
Public Class Head
    Inherits WQS_BusinessEntity.HeadSet
#Region "Private Variables"
 
    Private _iHeadID As Integer
 
#End Region

#Region "Constructors"
    Public Sub New()

    End Sub
    Public Sub New(ByVal iHeadID As Integer)
     
        _iHeadID = iHeadID
     

    End Sub
#End Region

#Region "Public Properties"
 
    Public Property iHeadID() As Integer
        Get
            Return _iHeadID
        End Get
        Set(ByVal iValue As Integer)
            _iHeadID = iValue
        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 my Shell/ShellSet:

Code:

---

Option Explicit On
Public Class Shell
    Inherits WQS_BusinessEntity.ShellSet

#Region "Private Variables"
 
    Private _iShellID As Integer
 

#End Region

#Region "Constructors"
    Public Sub New()

    End Sub
    Public Sub New(ByVal iShellID As Integer)
       
        _iShellID = iShellID
     
    End Sub
#End Region



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

---

Notice that this Bootset Object contains one to many boots, each of which contains a headset and a shellset. a headset/shellset can contain one or more heads/shells. I need to Access (display) the properties in the contained obects, and do so in my gridview. Here is my code from my gridview, but as you can see i just dont know how to do what Im trying to accomplish.

Code:

---

<asp:GridView ID="grdBoots" runat="server"  AutoGenerateColumns="false"  >


<AlternatingRowStyle CssClass="alt" />
<Columns>
<asp:TemplateField HeaderText="BootID" Visible="false">
<%--**********************************Boot Number************************************************************************* --%>
<HeaderTemplate>
<asp:Label id="lblBootID" runat="server" Text='<%# Eval("iBootID") %>'></asp:Label>
</HeaderTemplate>
</asp:TemplateField>



<%--**********************************Head Number*************************************************************************--%>
<asp:TemplateField HeaderText="HeadID" Visible="false" >
<ItemTemplate>
<asp:HiddenField ID="hfHeadID" runat="server" Visible="False" Value='<%# Eval(".oHeadSet(0).iHeadID") %>' ></asp:HiddenField>
</ItemTemplate>
</asp:TemplateField>
<%--**********************************Shell Number*************************************************************************--%>
<asp:TemplateField HeaderText="ShellID" Visible="false" >

<ItemTemplate>

<asp:HiddenField ID="hfShellID" runat="server" Visible="False" Value='<%# Eval("oShellSet(0).iShellID") %>' ></asp:HiddenField>

</ItemTemplate>
<FooterTemplate>
<asp:HiddenField ID="hfShellID" runat="server" Visible="False" Value='<%# Eval("oShellSet(0).iShellID") %>' ></asp:HiddenField>
</FooterTemplate>
</asp:TemplateField>

</Columns>

</asp:GridView>

---

I could really use help on this one!

asp.net...I am moving this thread there...
************************************
seems as if you're looking for a hiearchichal control, and thait is not natively gridview, but dataGrid. Yoou could extend the first, or use the second
here some samples that could help you (do not expect them to be perfect, you will have to adjust them to your needs):
http://www.codeproject.com/KB/custom...tgridview.aspx
http://www.codeproject.com/KB/webfor...rDataGrid.aspx

Actually, that is not what I am trying to do. It does help me however as I am building an extended gridview myself, which does what those articles illustrate.

With my current problem, I do not have child rows - just child objects. the Bootset is the parent object, and it contains a headset,a bootset, and a bootid. In my actual application there are other properties, but I simplified the problem for clarity. I want to display one row for each boot - which would also display the headid and the shellid for that boot.

I have attached a zipped solution, which may make things clearer....it also contains code which is my efforts to solve the problem (the GetHeadID and GetShellID functions)