asp.net 实现购物车

<%@ Page language="c#" Codebehind="shoppingcart.aspx.cs" AutoEventWireup="false" Inherits="myshop.shoppingcart" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
  <HEAD>
  <title>shoppingcart</title>
  <meta http-equiv="Content-Type" content="text/html; charset=gb2312">
  <LINK href="mycss.css" type="text/css" rel="stylesheet">
  <meta name="vs_defaultClientScript" content="JavaScript">
  <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
  </HEAD>
 <body>
  <center>
   <form id="Form1" runat="server">
    <table width="500" border="0" cellspacing="0" cellpadding="0">
     <tr>
      <td>
       <ASP:DataGrid id="ShoppingCartDlt" runat="server" Width="500" BackColor="white" BorderColor="black"
        ShowFooter="false" CellPadding="3" CellSpacing="0" Font-Name="Verdana" Font-Size="8pt" HeaderStyle-BackColor="#cecfd6"
        AutoGenerateColumns="false" MaintainState="true">
        <Columns>
         <asp:TemplateColumn HeaderText="删除">
          <ItemTemplate>
           <center>
            <asp:CheckBox id="chkProductID" runat="server" />
           </center>
          </ItemTemplate>
         </asp:TemplateColumn>
         <asp:BoundColumn DataField="ProdID" HeaderText="ID" />
         <asp:BoundColumn DataField="ProName" HeaderText="商品名称" />
         <asp:BoundColumn DataField="UnitPrice" HeaderText="单价" />
         <asp:TemplateColumn HeaderText="数量">
          <ItemTemplate>
           <asp:TextBox id="CountTb" runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"ProdCount")%>'>
           </asp:TextBox>
          </ItemTemplate>
         </asp:TemplateColumn>
         <asp:BoundColumn DataField="TotalPrice" HeaderText="小计(元)" />
        </Columns>
       </ASP:DataGrid></td>
     </tr>
    </table>
    <br>
    <table width="500" border="0" cellspacing="0" cellpadding="0">
     <tr>
      <td><asp:Button id="update" runat="server" Text="更新我的购物车"  CssClass="button2" /></td>
      <td><asp:Button id="CheckOut" runat="server" Text="结算"  CssClass="button5" />&nbsp;&nbsp;<input type="button" name="close2" value="继续购物" onClick="window.close();return false;"
        class="button2"></td>
      <td align="right"><br>
       <asp:Label id="label" runat="server" Width="100px" Visible="True" ForeColor="#FF8080" Height="18px"></asp:Label></td>
     </tr>
    </table>
   </form>
  </center>
 </body>
</HTML>
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