当前位置: 首页 > 图文教程 > 网络编程 > ASP.NET > asp.net 购物车实现详细代码

ASP.NET
Asp.net利用JQuery弹出层加载数据代码
asp.net dataview做无限极分类的又一用法
asp.net ckeditor编辑器的使用方法
告别ADO.NET实现应用系统无缝切换的烦恼(总结篇)
asp.net 实现动态显示当前时间(不用javascript不考虑开销)
.net动态显示当前时间(客户端javascript)
asp.net 结合YUI 3.0小示例
asp.net 取消缓存相关问题说明
asp.net 计划任务管理程序实现，多线程任务加载
ASP.NET 跨页面传值方法
asp.net中url地址传送中文参数时的两种解决方案
Asp.net 菜单控件简洁版
asp.net jQuery Ajax用户登录功能的实现
asp.net SharpZipLib的压缩与解压问题
asp.net url重写后页面回传问题
asp.net与Discuz!NT整合集成实例教程
Discuz!NT 3与asp.net 整合的实例教程
测试控制台使用方法
.net 动态标题实现方法
asp.net *.ashx类型的文件使用说明

No. « 162 163 164 165 »

技术文章搜索

关键字

ASP.NET 中的 asp.net 购物车实现详细代码

出处:互联网   整理: 软晨网（RuanChen.com）   发布: 2009-09-13   浏览: 160 ::
收藏到网摘: n/a

asp.net 购物车实现详细代码 <%@ 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( );
}
public void UpdateShoppingCart( )
{
if( Session["myCartTable"]==null )//Session["myCartTable"]==null
{
CreateCartTable( );
//调用函数CreateCartTable( )新建一个DataTable WriteShoppingCart( );
}
else
{
//如果购物蓝中已有商品,则需要对购物信息表DataTable进行更新,并将其棒定到ShoppingCartDlt WriteShoppingCart( );
}
}
public void ViewShoppingCart( ) //查看购物车
{
if( Session["myCartTable"]!=null )
{
DataTable viewTable=new DataTable( "nowCartTable" );
viewTable=( DataTable )Session["myCartTable"];
ShoppingCartDlt.DataSource = viewTable.DefaultView;
//购物车棒定到ShoppingCartDlt ShoppingCartDlt.DataBind( );
}
}
public void WriteShoppingCart( )
{
if( Request.Params["mode"]!="view" ) //检查是否是直接查看购物车,如果直接查看,就不再写MYCARTTABLE
{
DataTable nowTable=new DataTable( "nowCartTable" );
nowTable=( DataTable )Session["myCartTable"];
int pn=nowTable.Rows.Count;
int i=0;
bool hasone=false;
int nowProdID;
while( i<pn && !hasone )
{
nowProdID=Int32.Parse( nowTable.Rows[i][0].ToString( ) );
if( nowProdID==Int32.Parse( AddProID ) ) //判断购物信息表中,是否存有当前放入商品. if( nowProdID==Int32.Parse( AddProID ) )
{
hasone=true;
}
else
{
i++;
}
}
if( hasone )
{
//如果已有该商品,则 hasone=true,更改该数据行 DataRow oldDR;
oldDR=nowTable.Rows[i];
oldDR["ProdCount"]=Int32.Parse( oldDR["ProdCount"].ToString( ) )+1;
oldDR["TotalPrice"]=Int32.Parse( oldDR["ProdCount"].ToString( ) )*Double.Parse( oldDR["UnitPrice"].ToString( ) );
}
else
{
//如果没有该商品,在表中新加如一行. DataRow newDR;
double unitp;
String strcon="provider=Microsoft.jet.OLEDB.4.0;
data Source="+Server.MapPath( ConfigurationSettings.AppSettings["MDBpath2"] )+";
";
OleDbConnection myConnection = new OleDbConnection( strcon );
string strSQL= "select * from pro where product_id="+AddProID+"";
OleDbDataAdapter myCommand = new OleDbDataAdapter( strSQL, myConnection );
DataSet ds = new DataSet( );
myCommand.Fill( ds, "AddP" );
newDR=nowTable.NewRow( );
newDR[0]=AddProID;
newDR[2]=ds.Tables["Addp"].Rows[0]["product_name"].ToString( );
unitp=Double.Parse( ds.Tables["AddP"].Rows[0]["product_memprice"].ToString( ) );
//会员价 newDR[3]=unitp;
newDR[4]=unitp;
//第一次读库,所以总价格和单价是一样的. //newDR[5]="0";
nowTable.Rows.Add( newDR );
myConnection.Close( );
}
ShoppingCartDlt.DataSource = nowTable.DefaultView;
//将更新后的 DataTable棒定到ShoppingCartDlt ShoppingCartDlt.DataBind( );
Session["myCartTable"] = nowTable;
//重新保存更新过的DataTable
}
}
public void Caculator( )
{
if( Session["myCartTable"]!=null ) //购物车是否为空
{
int h;
Double TotalPri;
TotalPri=0;
DataTable nowTable3=new DataTable( "nowCartTable3" );
nowTable3=( DataTable )Session["myCartTable"];
if( nowTable3.Rows.Count>0 ) //返回购物车中是否有货物
{
for( h=0;
h<=nowTable3.Rows.Count-1;
h++ )
{
TotalPri=TotalPri+Int32.Parse( nowTable3.Rows[h][4].ToString( ) );
//Double.Parse( ( string )TotalText.Text );
}
label.Text="总计: "+TotalPri.ToString( )+" 元" ;
}
}
}
public void Update( )
{
int i;
int j;
int k;
ArrayList deleteItem = new ArrayList( 10 );
DataGridItem _item ;
j=0;
int deleteid;
k=0;
DataTable nowTable2=new DataTable( "nowCartTable2" );
nowTable2=( DataTable )Session["myCartTable"];
for( i=0;
i<=this.ShoppingCartDlt.Items.Count-1;
i++ )
{
_item = this.ShoppingCartDlt.Items[i];
TextBox CountText=( TextBox )this.ShoppingCartDlt.Items[i].Cells[4].FindControl( "CountTb" );
//Controls[1];
//_item.FindControl( "CountTb" );
CheckBox ProductIDCheck =( CheckBox ) _item.FindControl( "chkProductID" );
nowTable2.Rows[i][1] = Int32.Parse( CountText.Text.ToString( ) );
nowTable2.Rows[i][4] = Int32.Parse( nowTable2.Rows[i][1].ToString( ) ) * Double.Parse( nowTable2.Rows[i][3].ToString( ) );
if( ProductIDCheck.Checked )
{
nowTable2.Rows[i][5] = 1;
//添加删除标记1 j=j+1;
}
}
string strExpr="IsDeleted>0";
//http://msdn.microsoft.com/library/chs/default.asp?url=/library/CHS/cpref/html/frlrfSystemDataDataTableClassSelectTopic.asp DataRow[] foundRows = nowTable2.Select( strExpr );
for( int m = 0;
m < foundRows.Length;
m ++ )
{
//Console.WriteLine( foundRows[i][0] );
foundRows[m].Delete( );
}
ShoppingCartDlt.DataSource = nowTable2.DefaultView;
ShoppingCartDlt.DataBind( );
Session["myCartTable"] = nowTable2;
Caculator( );
}
#region Web 窗体设计器生成的代码 override protected void OnInit( EventArgs e )
{
// // CODEGEN: 该调用是 asp.NET Web 窗体设计器所必需的. // InitializeComponent( );
base.OnInit( e );
}
/// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容. /// </summary> private void InitializeComponent( )
{
this.update.Click += new System.EventHandler( this.update_Click );
this.CheckOut.Click += new System.EventHandler( this.CheckOut_Click );
this.Load += new System.EventHandler( this.Page_Load );
}
#endregion
private void update_Click( object sender, System.EventArgs e )
{
Update( );
}
private void CheckOut_Click( object sender, System.EventArgs e )
{
Update( );
Response.Redirect( "checkout.aspx" );
}
}
}