I have a ASP.NET FormView, that - via an ObjectDataSource - is bound to my EventOrder-object:

    [Serializable]
public class EventOrder
{
    [Serializable]
    public class OrderTicket
    {
        public int Qty { get; set; }
        public int Id
        {
            get { return this.Ticket.Id; } 
        }
        public Ticket Ticket { get; set; }
        public double TicketPrice { get; set; }
    }

    [Serializable]
    public class OrderExtra
    {
        public int Qty { get; set; }
        public int Id
        {
            get { return this.Extra.Id; }
        }
        public Extra Extra { get; set; }
    }

    public Event Event { get; set; }
    public List<OrderTicket> OrderTickets { get; set; }
    public List<OrderExtra> OrderExtras { get; set; }
    public UserProfile UserProfile { get; set; }
    public List<Fee> Fees { get; set; }
    public List<Discount> Discounts { get; set; }

    public EventOrder()
    {
        this.OrderExtras = new List<OrderExtra>();
        this.OrderTickets = new List<OrderTicket>();
        this.Fees = new List<Fee>();
        this.Discounts = new List<Discount>();
    }
}

In my FormView, I have a bindingexpression on an inner listview for my collection of OrderTickets:

 <asp:ListView Visible="false" runat="server" DataKeyNames="Id" ID="lvTickets" DataSource='<%# Bind("OrderTickets") %>'>
 <ItemTemplate>
      <asp:TextBox ID="TextBox5" Text='<%# Bind("Qty") %>' runat="server"></asp:TextBox>
      <asp:Label ID="Label1" runat="server" Text='<%# Eval("Ticket.Title") %>'></asp:Label>
      <asp:Label ID="Label2" runat="server" Text='<%# Eval("TicketPrice") %>'></asp:Label><br />
 </ItemTemplate>

My problem is that the Qty-property isn't databound to the object when the parent container is updated.

Is it possible to have this kind of parent-child relation with 2-way databinding? Can I force the child listview to update it's bound dataobject when I submit the form?