<asp:GridView ID="GridView1" runat="server" OnSelectedIndexChanged="GridView1_SelectedIndexChanged" AutoGenerateColumns="False" BackColor="White" BorderColor="#999999" BorderStyle="Solid" BorderWidth="1px" CellPadding="3" DataSourceID="SqlDataSource4" ForeColor="Black" GridLines="Vertical" Height="300px" Width="1265px" AllowPaging="True" AllowSorting="True">
           <AlternatingRowStyle BackColor="#CCCCCC" />
           <Columns>
               <asp:CommandField ShowSelectButton="True" SelectText="Add to Cart"></asp:CommandField>
               <asp:BoundField DataField="ID_CARTE" HeaderText="Id" SortExpression="ID_CARTE"/>
               <asp:BoundField DataField="Titlu" HeaderText="Titlu" SortExpression="Titlu" />
               <asp:BoundField DataField="Nume_Autor" HeaderText="Nume Autor" SortExpression="Nume_Autor" />
               <asp:BoundField DataField="Prenume_Autor" HeaderText="Prenume Autor" SortExpression="Prenume_Autor" />
               <asp:BoundField DataField="ISBN" HeaderText="ISBN" SortExpression="ISBN" />
               <asp:BoundField DataField="An_Aparitie" HeaderText="An Aparitie" SortExpression="An_Aparitie" />
               <asp:BoundField DataField="Pret" HeaderText="Pret" SortExpression="Pret" />
               <asp:BoundField DataField="Format_Carte" HeaderText="Format Carte" SortExpression="Format_Carte" />
           </Columns>
           <FooterStyle BackColor="#CCCCCC" />
           <HeaderStyle BackColor="Black" Font-Bold="True" ForeColor="White" />
           <PagerStyle BackColor="#999999" ForeColor="Black" HorizontalAlign="Center" />
           <SelectedRowStyle BackColor="#000099" Font-Bold="True" ForeColor="White" />
           <SortedAscendingCellStyle BackColor="#F1F1F1" />
           <SortedAscendingHeaderStyle BackColor="#808080" />
           <SortedDescendingCellStyle BackColor="#CAC9C9" />
           <SortedDescendingHeaderStyle BackColor="#383838" />
       </asp:GridView>
```Carti.aspx.vb
''This is the Shopping Cart count
 Protected Sub GridView1_SelectedIndexChanged(sender As Object, e As EventArgs)

       Dim SelectedID_CARTE = Long.Parse(GridView1.SelectedRow.Cells()(1).Text)

       Dim shoppingCart = CType(HttpContext.Current.Session("ShoppingCart"), List(Of Integer))

       If shoppingCart Is Nothing Then
           shoppingCart = New List(Of Integer)
           HttpContext.Current.Session.Add("ShoppingCart", shoppingCart)
       End If

       If Not shoppingCart.Contains(SelectedID_CARTE) Then
           shoppingCart.Add(SelectedID_CARTE)
       End If

       Dim ItemsCount = CType(Master.FindControl("LoginView").FindControl("ItemsCount"), Label)

       If (Not (shoppingCart Is Nothing) And Not (ItemsCount Is Nothing)) Then
           ItemsCount.Text = shoppingCart.Count
       End If

   End Sub