【下载文档:  asp.net 购物车实现详细代码.txt 】

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asp.net 购物车实现详细代码
<%@ Page language="c#" Codebehind="shoppingcart.aspx.cs" AutoEventWireup="false" Inherits="myshop.shoppingcart" %>

=======================================================================================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 { ///

/// shoppingcart 的摘要说明. ///

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( i0 ) //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 ); } ///

/// 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. ///

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" ); } } }