This document defines an Order page class that inherits from the System.Web.UI.Page class. It contains methods for loading product data from a data source and displaying product details based on a selected product. It also contains a method for adding the selected product to the shopping cart when the Add button is clicked, which redirects to the Cart page.

1. Imports System.Data
Partial Class Order
Inherits System.Web.UI.Page
Private selectedProduct As Product
Protected Sub Page_Load(ByVal sender As Object,
ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
ddlProducts.DataBind()
End If
selectedProduct = Me.GetSelectedProduct
lblName.Text = selectedProduct.Name
lblShortDescription.Text = selectedProduct.ShortDescription
lblLongDescription.Text = selectedProduct.LongDescription
lblUnitPrice.Text = FormatCurrency(selectedProduct.UnitPrice)
imgProduct.ImageUrl = "Images/Products/" &
selectedProduct.ImageFile
End Sub
Private Function GetSelectedProduct() As Product
Dim productTable As DataView = CType(AccessDataSource1.Select(
DataSourceSelectArguments.Empty), DataView)
productTable.RowFilter = "ProductID = '" &
ddlProducts.SelectedValue & "'"
Dim productRow As DataRowView = productTable(0)
Dim product As New Product
product.ProductID = productRow("ProductID").ToString
product.Name = productRow("Name").ToString
product.ShortDescription = productRow("ShortDescription").ToString
product.LongDescription = productRow("LongDescription").ToString
product.UnitPrice = CDec(productRow("UnitPrice"))
product.ImageFile = productRow("ImageFile").ToString
Return product
End Function
Protected Sub btnAdd_Click(ByVal sender As Object,
ByVal e As System.EventArgs) Handles btnAdd.Click
If Page.IsValid Then
Dim cart As CartItemList = CartItemList.GetCart
Dim cartItem As CartItem = cart(selectedProduct.ProductID)
If cartItem Is Nothing Then
cart.AddItem(selectedProduct, CInt(txtQuantity.Text))
Else
cartItem.AddQuantity(CInt(txtQuantity.Text))
End If
Response.Redirect("Cart.aspx")
End If
End Sub
End Class