zoukankan      html  css  js  c++  java

  • 实现购物车详细代码vs03

     1<%@ Page language="c#" CodeFile="Default2.aspx.cs" AutoEventWireup="false" Inherits="myshop.shoppingcart" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ><HTML> <HEAD> 
     2<title>shoppingcart</title> 
     3<meta http-equiv="Content-Type" content="text/html; 
     4charset=gb2312"> <LINK href="mycss.css" type="text/css" rel="stylesheet"> 
     5<meta name="vs_defaultClientScript" content="JavaScript"> 
     6<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> </HEAD> 
     7<body> <center> 
     8<form id="Form1" runat="server"> <table width="500" border="0" cellspacing="0" cellpadding="0"> <tr> <td> 
     9<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> 
    10<asp:TemplateColumn HeaderText="删除"> 
    11<ItemTemplate> <center> 
    12<asp:CheckBox id="chkProductID" runat="server" /> </center> 
    13</ItemTemplate> </asp:TemplateColumn> 
    14<asp:BoundColumn DataField="ProdID" HeaderText="ID" /> 
    15<asp:BoundColumn DataField="ProName" HeaderText="商品名称" /> 
    16<asp:BoundColumn DataField="UnitPrice" HeaderText="单价" /> 
    17<asp:TemplateColumn HeaderText="数量"> 
    18<ItemTemplate> 
    19<asp:TextBox id="CountTb" runat="server" Text='<%#DataBinder.Eval( Container.DataItem,"ProdCount" )%>'> </asp:TextBox> 
    20</ItemTemplate> </asp:TemplateColumn> 
    21<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> 
    22<asp:Button id="update" runat="server" Text="更新我的购物车" CssClass="button2" OnClick="update_Click" /></td> <td> 
    23<asp:Button id="CheckOut" runat="server" Text="结算" CssClass="button5" /> 
    24
    25<input type="button" name="close2" value="继续购物" onClick="window.close( ); 
    26return false; 
    27" class="button2"></td> <td align="right"><br> 
    28<asp:Label id="label" runat="server" Width="100px" Visible="True" ForeColor="#FF8080" Height="18px"></asp:Label></td> </tr> </table> 
    29</form> </center> 
    30</body></HTML>
      1using System; 
      2using System.Collections; 
      3using System.ComponentModel; 
      4using System.Web.SessionState;
      5using System.Web; 
      6using System.Web.UI; 
      7using System.Web.UI.HtmlControls; 
      8using System.Web.UI.WebControls; 
      9using System.Data; 
     10using System.Data.OleDb; 
     11using System.Configuration;
     12namespace myshop
     13{
     14    /// <summary＞ /// shoppingcart 的摘要说明. /// </summary＞ 
     15    public class shoppingcart : System.Web.UI.Page
     16    {
     17        string AddProID;
     18        private void Page_Load(object sender, System.EventArgs e)
     19        {
     20            try
     21            {
     22                if (Session["logon"] != "yes" || Session["username"] == null)
     23                {
     24                    Response.Redirect("error.htm");
     25                }
     26            }
     27            catch
     28            {
     29                Response.Redirect("error.htm");
     30            }
     31            /////////////查看用户是否已经登陆. 
     32            if (!IsPostBack)
     33            {
     34                if (Request.Params["mode"] == "view") //检测是否为直接查看购物车. 
     35                {
     36                    ViewShoppingCart();
     37                    Caculator();
     38                }
     39                if (Request.Params["productID"] != null || Request.Params["productID"] != "")
     40                {
     41                    AddProID = Request["productID"];
     42                    UpdateShoppingCart();
     43                    Caculator();
     44                }
     45            }
     46            // 在此处放置用户代码以初始化页面 
     47        }
     48        public void CreateCartTable() //创建购物车 
     49        {
     50            DataSet ds = new DataSet();
     51            DataTable newDT = new DataTable("CartTable");
     52            ds.Tables.Add(newDT);
     53            DataColumn newDC;
     54            newDC = new DataColumn("ProdID", System.Type.GetType("System.Int32"));
     55            ds.Tables["CartTable"].Columns.Add(newDC);
     56            newDC = new DataColumn("ProdCount", System.Type.GetType("System.Int32"));
     57            newDC.DefaultValue = 1;
     58            ds.Tables["CartTable"].Columns.Add(newDC);
     59            newDC = new DataColumn("ProName", System.Type.GetType("System.String"));
     60            ds.Tables["CartTable"].Columns.Add(newDC);
     61            newDC = new DataColumn("UnitPrice", System.Type.GetType("System.Double"));
     62            ds.Tables["CartTable"].Columns.Add(newDC);
     63            newDC = new DataColumn("TotalPrice", System.Type.GetType("System.Double"));
     64            ds.Tables["CartTable"].Columns.Add(newDC);
     65            newDC = new DataColumn("IsDeleted", System.Type.GetType("System.Int32"));
     66            newDC.DefaultValue = 0;
     67            // public void WriteShoppingCart( ) 中 newDR[5]="0";行,已被注销, ds.Tables["CartTable"].Columns.Add( newDC ); 
     68            Session["myCartTable"] = newDT;
     69            ShoppingCartDlt.DataSource = ds.Tables["CartTable"].DefaultView;
     70            ShoppingCartDlt.DataBind();
     71        }
     72
     73        public void UpdateShoppingCart()
     74        {
     75            if (Session["myCartTable"] == null)//Session["myCartTable"]==null 
     76            {
     77                CreateCartTable();
     78                //调用函数CreateCartTable( )新建一个DataTable WriteShoppingCart( ); 
     79            }
     80            else
     81            {
     82                //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( ); 
     83            }
     84        }
     85        public void ViewShoppingCart() //查看购物车 
     86        {
     87            if (Session["myCartTable"] != null)
     88            {
     89                DataTable viewTable = new DataTable("nowCartTable");
     90                viewTable = (DataTable)Session["myCartTable"];
     91                ShoppingCartDlt.DataSource = viewTable.DefaultView;
     92                //购物车棒定到ShoppingCartDlt ShoppingCartDlt.DataBind( ); 
     93            }
     94        }
     95        public void WriteShoppingCart()
     96        {
     97            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 
     98            {
     99                DataTable nowTable = new DataTable("nowCartTable");
    100                nowTable = (DataTable)Session["myCartTable"];
    101                int pn = nowTable.Rows.Count;
    102                int i = 0;
    103                bool hasone = false;
    104                int nowProdID;
    105                while (i < pn && !hasone)
    106                {
    107                    nowProdID = Int32.Parse(nowTable.Rows[i][0].ToString());
    108                    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 ) ) 
    109                    {
    110                        hasone = true;
    111                    }
    112                    else
    113                    {
    114                        i++;
    115                    }
    116                }
    117                if (hasone)
    118                {
    119                    //如果已有该商品,则 hasone=true,更改该数据行 DataRow oldDR; 
    120                    oldDR = nowTable.Rows[i];
    121                    oldDR["ProdCount"] = Int32.Parse(oldDR["ProdCount"].ToString()) + 1;
    122                    oldDR["TotalPrice"] = Int32.Parse(oldDR["ProdCount"].ToString()) * Double.Parse(oldDR["UnitPrice"].ToString());
    123                }
    124                else
    125                {
    126                    //如果没有该商品,在表中新加如一行. DataRow newDR; 
    127                    double unitp;
    128                    String strcon = "provider=Microsoft.jet.OLEDB.4.0;data Source=" + Server.MapPath(ConfigurationSettings.AppSettings["MDBpath2"]) + ";";
    129                    OleDbConnection myConnection = new OleDbConnection(strcon);
    130                    string strSQL = "select * from pro where product_id=" + AddProID + "";
    131                    OleDbDataAdapter myCommand = new OleDbDataAdapter(strSQL, myConnection);
    132                    DataSet ds = new DataSet();
    133                    myCommand.Fill(ds, "AddP");
    134                    newDR = nowTable.NewRow();
    135                    newDR[0] = AddProID;
    136                    newDR[2] = ds.Tables["Addp"].Rows[0]["product_name"].ToString();
    137                    unitp = Double.Parse(ds.Tables["AddP"].Rows[0]["product_memprice"].ToString());
    138                    //会员价 newDR[3]=unitp; 
    139                    newDR[4] = unitp;
    140                    //第一次读库,所以总价格和单价是一样的. //newDR[5]="0"; 
    141                    nowTable.Rows.Add(newDR);
    142                    myConnection.Close();
    143                }
    144                ShoppingCartDlt.DataSource = nowTable.DefaultView;
    145                //将更新后的 DataTable棒定到ShoppingCartDlt ShoppingCartDlt.DataBind( ); 
    146                Session["myCartTable"] = nowTable;
    147                //重新保存更新过的DataTable 
    148            }
    149        }
    150        public void Caculator()
    151        {
    152            if (Session["myCartTable"] != null) //购物车是否为空 
    153            {
    154                int h;
    155                Double TotalPri;
    156                TotalPri = 0;
    157                DataTable nowTable3 = new DataTable("nowCartTable3");
    158                nowTable3 = (DataTable)Session["myCartTable"];
    159                if (nowTable3.Rows.Count > 0) //返回购物车中是否有货物 
    160                {
    161                    for (h = 0;
    162                    h <= nowTable3.Rows.Count - 1;
    163                    h++)
    164                    {
    165                        TotalPri = TotalPri + Int32.Parse(nowTable3.Rows[h][4].ToString());
    166                        //Double.Parse( ( string )TotalText.Text ); 
    167                    }
    168                    label.Text = "总计: " + TotalPri.ToString() + " 元";
    169                }
    170            }
    171        }
    172
    173
    174        public void Update()
    175        {
    176            int i;
    177            int j;
    178            int k;
    179            ArrayList deleteItem = new ArrayList(10);
    180            DataGridItem _item;
    181            j = 0;
    182            int deleteid;
    183            k = 0;
    184            DataTable nowTable2 = new DataTable("nowCartTable2");
    185            nowTable2 = (DataTable)Session["myCartTable"];
    186            for (i = 0;
    187            i <= this.ShoppingCartDlt.Items.Count - 1;
    188            i++)
    189            {
    190                _item = this.ShoppingCartDlt.Items[i];
    191                TextBox CountText = (TextBox)this.ShoppingCartDlt.Items[i].Cells[4].FindControl("CountTb");
    192                //Controls[1]; 
    193                //_item.FindControl( "CountTb" ); 
    194                CheckBox ProductIDCheck = (CheckBox)_item.FindControl("chkProductID");
    195                nowTable2.Rows[i][1] = Int32.Parse(CountText.Text.ToString());
    196                nowTable2.Rows[i][4] = Int32.Parse(nowTable2.Rows[i][1].ToString()) * Double.Parse(nowTable2.Rows[i][3].ToString());
    197                if (ProductIDCheck.Checked)
    198                {
    199                    nowTable2.Rows[i][5] = 1;
    200                    //添加删除标记1 j=j+1; 
    201                }
    202            }
    203            string strExpr = "IsDeleted>0";
    204            //http://msdn.microsoft.com/library/chs/default.asp?url=/library/CHS/cpref/html/frlrfSystemDataDataTableClassSelectTopic.asp DataRow[] foundRows = nowTable2.Select( strExpr ); 
    205            for (int m = 0;
    206            m < foundRows.Length;
    207            m++)
    208            {
    209                //Console.WriteLine( foundRows[i][0] ); 
    210                foundRows[m].Delete();
    211            }
    212            ShoppingCartDlt.DataSource = nowTable2.DefaultView;
    213            ShoppingCartDlt.DataBind();
    214            Session["myCartTable"] = nowTable2;
    215            Caculator();
    216        }
    217        Web 窗体设计器生成的代码
    231        private void update_Click(object sender, System.EventArgs e)
    232        {
    233            Update();
    234        }
    235        private void CheckOut_Click(object sender, System.EventArgs e)
    236        {
    237            Update();
    238            Response.Redirect("checkout.aspx");
    239        }
    240    }
    241}
  • 相关阅读:
    JS-15 (class)
    JS-14 (解构)
    AI CycleGAN
    AI GAN
    AI StarGAN
    AI VGG
    硬件 PCIe总线
    工具 docker
    MySql开启慢速查询日志
    AI StyleGAN
  • 原文地址：https://www.cnblogs.com/zwl12549/p/608915.html
Copyright © 2011-2022 走看看