asp.net 购物车实现详细代码
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2022-05-28 12:17:00
<%@ page language="c#" codebehind="shoppingcart.aspx.cs" autoeventwireup="false" in...
<%@ 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" );
}
}
}
<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" );
}
}
}
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