asp.net 实现购物车详细代码

＜%@ 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" /＞ ＜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＞=======================================================================================以上为HTML页面部分 ========================================================================================== using System; using System.Collections; using System.ComponentModel; using System.Web.SessionState;using System.Web; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Data; using System.Data.OleDb; using System.Configuration; namespace myshop { /// ＜summary＞ /// shoppingcart 的摘要说明. /// ＜/summary＞ public class shoppingcart : System.Web.UI.Page { protected System.Web.UI.WebControls.DataGrid ShoppingCartDlt; protected System.Web.UI.WebControls.Button update; protected System.Web.UI.WebControls.Button CheckOut; protected System.Web.UI.HtmlControls.HtmlForm Form1; protected System.Web.UI.WebControls.Label label; protected System.Web.UI.WebControls.CheckBox chkProductID; protected System.Web.UI.WebControls.TextBox txtCount; protected System.Web.UI.WebControls.TextBox CountTb; string AddProID; private void Page_Load( object sender, System.EventArgs e ) { try { if ( Session["logon"]!="yes"　　Session["username"]==null ) { Response.Redirect( "error.htm" ) ; } } catch { Response.Redirect( "error.htm" ) ; } /查看用户是否已经登陆. if( !IsPostBack ) { if( Request.Params["mode"]=="view" ) //检测是否为直接查看购物车. { ViewShoppingCart( ); Caculator( ); } if( Request.Params["productID"]!=null　　Request.Params["productID"]!="" ){ AddProID=Request["productID"]; UpdateShoppingCart( ); Caculator( ); } } // 在此处放置用户代码以初始化页面 } public void CreateCartTable( ) //创建购物车 { DataSet ds = new DataSet( ); DataTable newDT=new DataTable( "CartTable" ); ds.Tables.Add( newDT ); DataColumn newDC; newDC=new DataColumn( "ProdID",System.Type.GetType( "System.Int32" ) ); ds.Tables["CartTable"].Columns.Add( newDC ); newDC=new DataColumn( "ProdCount",System.Type.GetType( "System.Int32" ) ); newDC.DefaultValue=1; ds.Tables["CartTable"].Columns.Add( newDC ); newDC=new DataColumn( "ProName",System.Type.GetType( "System.String" ) ); ds.Tables["CartTable"].Columns.Add( newDC ); newDC=new DataColumn( "UnitPrice",System.Type.GetType( "System.Double" ) ); ds.Tables["CartTable"].Columns.Add( newDC ); newDC=new DataColumn( "TotalPrice",System.Type.GetType( "System.Double" ) ); ds.Tables["CartTable"].Columns.Add( newDC ); newDC=new DataColumn( "IsDeleted",System.Type.GetType( "System.Int32" ) ); newDC.DefaultValue=0; // public void WriteShoppingCart( ) 中 newDR[5]="0"; 行,已被注销, ds.Tables["CartTable"].Columns.Add( newDC ); Session["myCartTable"]=newDT; ShoppingCartDlt.DataSource=ds.Tables["CartTable"].DefaultView; ShoppingCartDlt.DataBind( ); }