I can't make sense from the logic, nor do I know what your class objects look like. But, in the page load event, it appears that not all objects have the chance of being instantiated. Customer - this is always created Order - creates a new object unless found in the session object. Cart - Never creates a new instance and assumes there will always be a "cart" object in session object. The easiest way is to put a break point on your code and see where it blows up.. :wtf: My Personal Site

Displaying binary data directly in ASP is a bit hairy. I'd stick with an <img tag; View Source in IE to see what the path is, and check the data list to see if it's formatting your HTML as text - there should be a property in there somewhere. Again, View Source will help you out. My instinct is that it's some kind of HTML formatting issue.

And this is code for Order.aspx. Incorrect syntax that I can't find. That makes me really worried! <%@ Page Language="VB" MasterPageFile="~/MasterPage.master" Title="Untitled Page" AutoEventWireup="False" %> <%@ Register Src="~/Manage/Order.ascx" TagName="Order" TagPrefix="uc1" %> <script runat="server"> Protected Sub Page\_Load(ByVal sender As Object, ByVal e As System.EventArgs) If Not IsPostBack Then ddlOrder.DataBind() End If Session("OrderNum") = ddlOrder.SelectedValue End Sub </script> <asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server"> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server"> Choose an order to display: <asp:DropDownList ID="ddlOrder" runat="server" AutoPostBack="True" DataSourceID="SqlDataSource1" DataTextField="OrderNum" DataValueField="OrderNum"> </asp:DropDownList>  <asp:LinkButton ID="LinkButton1" runat="server" PostBackUrl="~/Manage/PrintOrder.aspx">Print this page</asp:LinkButton> <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ProjectConnectionString %>" SelectCommand="SELECT OrderNum FROM Order ORDER BY OrderNum"> </asp:SqlDataSource><br /><br /> <uc1:Order ID="Order1" runat="server" /> </asp:Content>

this is the function in ShoppingCart class. Imports Microsoft.VisualBasic Imports System.Collections.Generic Public Class ShoppingCart Private \_cart As List(Of CartItem) Public Sub New() \_cart = New List(Of CartItem)() End Sub Public Function GetItems() As List(Of CartItem) Return \_cart End Function Public Sub AddItem(ByVal id As String, ByVal name As String, ByVal price As Decimal) Dim itemFound As Boolean = False For Each Item As CartItem In \_cart If Item.ID = id Then Item.Quantity += 1 itemFound = True End If Next If Not itemFound Then Dim item As CartItem item = New CartItem(id, name, price, 1) \_cart.Add(item) End If End Sub Public Sub UpdateQuantity(ByVal index As Integer, ByVal quantity As Integer) 'update quantity function Dim item As CartItem item = \_cart(index) item.Quantity = quantity End Sub Public Sub DeleteItem(ByVal index As Integer) 'delete item function \_cart.RemoveAt(index) End Sub Public ReadOnly Property Count() As Integer Get Return \_cart.Count End Get End Property End Class