实现购物车详细代码vs03

<%@ 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

charset=gb2312"> <LINK href="mycss.css" type="text/css" rel="stylesheet">
5

<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

<input type="button" name="close2" value="继续购物" onClick="window.close( );
26

return 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>

using System;
2

using System.Collections;
3

using System.ComponentModel;
4

using System.Web.SessionState;
5

using System.Web;
6

using System.Web.UI;
7

using System.Web.UI.HtmlControls;
8

using System.Web.UI.WebControls;
9

using System.Data;
10

using System.Data.OleDb;
11

using System.Configuration;
12

namespace 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

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

}

posted @ 2006-12-31 14:22 子午阅读(2311) 评论(0) 编辑收藏举报

会员力量，点亮园子希望

刷新页面返回顶部

实现购物车详细代码vs03

公告