标签：加油！ ati undefined response 数据处理 target lse 操作 更改
在最近学习的经典模块中有使用JavaScript实现购物车自动刷新商品数量和商品价格的功能；经过我的一番研究后把代码整理出来；
由于这个例子中并没有使用到数据库，定义了一个数组作为数据源，代码如下
<?php $shopcar=array( array("0","手机","20","100","98","9.8"), array("1","电脑","25","120","88","9"), array("2","汽车","19","200","180","9"), array("3","香蕉","10","2","1.8","9"), array("4","苹果","5","5","4.8","9"), ); ?> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <table border="0" cellspacing="0" cellpadding="0" align="center"> <form id="myshopcar" name="myshopcar" method="post" action="#"> <tr> <td height="30" colspan="7" align="center" valign="middle" class="first">我的购物车</td> </tr> <tr> <td width="35" height="25" align="center" valign="middle" class="left"> </td> <td width="100" height="25" align="center" valign="middle" class="center">商品名称</td> <td width="100" height="25" align="center" valign="middle" class="center">购买数量</td> <td width="100" height="25" align="center" valign="middle" class="center">市场价格</td> <td width="100" height="25" align="center" valign="middle" class="center">会员价格</td> <td width="100" height="25" align="center" valign="middle" class="center">折扣率</td> <td width="100" height="25" align="center" valign="middle" class="right">合计</td> </tr> <?php foreach ($shopcar as $key => $value) { ?> <tr> <td height="25" align="center" valign="middle" class="left"><input id="chk" name="chk[]" type="checkbox" value="<?php echo $value[0]; ?>"></td> <td height="25" align="center" valign="middle" class="center"><div id = "c_name<?php echo $value[0]; ?>"> <?php echo $value[1]; ?></div></td> <td height="25" align="center" valign="middle" class="center"> <input id="cnum<?php echo $value[0]; ?>" name="cnum<?php echo $value[0]; ?>" type="text" class="shorttxt" value="<?php echo $value[2]; ?>" onkeyup="cvp(<?php echo $value[0]; ?>,<?php echo $value[4]; ?>,<?php echo count($shopcar) ?>)"></td> <td height="25" align="center" valign="middle" class="center"><div id="m_price<?php echo $value[0]; ?>"> <?php echo $value[3]; ?></div></td> <td height="25" align="center" valign="middle" class="center"><div id="v_price<?php echo $value[0]; ?>"> <?php echo $value[4]; ?></div></td> <td height="25" align="center" valign="middle" class="center"><div id="fold<?php echo $value[0]; ?>"> <?php echo $value[5]; ?></div></td> <td height="25" align="center" valign="middle" class="right"><div id="total<?php echo $value[0]; ?>"> <?php echo $value[2]*$value[4]; ?></div></td> <tr> <?php } ?> <td height="25" colspan="3" align="left" valign="middle"> <a href="#" onclick="return alldel(myshopcar)">全选</a> <a href="#" onclick="return overdel(myshopcar);">反选</a> <input type="button" value="删除选择" class="btn" style="border-color: #FFFFFF;" onClick = ‘return del(myshopcar);‘> </td> <td height="25" align="center" valign="middle"><input id="cont" name="cont" type="button" class="btn" value="去数据库修改" onclick="return conshop(myshopcar)" /></td> <td height="25" align="center" valign="middle"><input id="uid" name="uid" type="hidden" value="tang" ><input id="settle" name="settle" type="button" class="btn" value="去收银台" onclick="return formset(form)" /></td> <td height="25" colspan="2" align="right" valign="middle"><div id=‘sum‘>共计7622 元</div></td> </tr> </form> </table> </body> </html>
然后是最主要的JavaScript脚本，实现自动刷新的功能代码如下：
实现商品删除代码：
<script>
/* 删除记录 */
function del(form){ if(!window.confirm(‘是否要删除数据??‘)){ }else{ var leng = form.chk.length;//返回复选框的长度 if(leng==undefined){ if(!form.chk.checked){ alert(‘请选取要删除数据!‘); }else{//如果只有一个复选框，而且处于选中状态 rd = form.chk.value;//将复选框的value值直接赋给变量rd var url = ‘test.php?rd=‘+rd;//根据rd生成url xmlhttp.open("GET",url,true); xmlhttp.onreadystatechange = delnow;//调用delnow函数 xmlhttp.send(null); } }else{ //如果复选框为多个 var rd=new Array();//声明数组 var j = 0; for( var i = 0; i < leng; i++){//循环检查复选框状态 if(form.chk[i].checked){ rd[j++] = form.chk[i].value;//将被选中的复选框的value值存到rd内 } } if(rd == ‘‘){ alert(‘请选取要删除数据!‘); }else{ var url = "test.php?rd="+rd; alert(url); xmlhttp.open("GET",url,true); xmlhttp.onreadystatechange = delnow; xmlhttp.send(null); } } } return false; } function delnow(){ if(xmlhttp.readyState == 4&&xmlhttp.status == 200){ var msg = xmlhttp.responseText; if(msg != ‘1‘){ alert(‘删除失败‘+msg); }else{ alert(‘删除成功‘); location=(‘?page_type=shopcar‘); } } } //全部选择/取消 function alldel(form){ var leng = form.chk.length; if(leng==undefined){ if(!form.chk.checked) form.chk.checked=true; }else{ for( var i = 0; i < leng; i++) { if(!form.chk[i].checked) form.chk[i].checked = true; } } return false; } // 反选 function overdel(form){ var leng = form.chk.length; if(leng==undefined){ if(!form.chk.checked) form.chk.checked=true; else form.chk.checked=false; }else{ for( var i = 0; i < leng; i++) { if(!form.chk[i].checked) form.chk[i].checked = true; else form.chk[i].checked = false; } } return false; }
实现自动刷新总金额代码：
//自动刷新总金额 // key商品id // vpr商品单价 // shoparr商品数量 function cvp(key,vpr,shoparr){ var n_pre = ‘total‘;//获取div标签的id前缀 var num = ‘cnum‘+key.toString();//根据key值生成文本域的id值 var total = n_pre+key.toString();//根据key值生成的div标签的id值 var t_number = document.getElementById(num).value;//获取输入的商品数量 var ttl = t_number * vpr;//根据商品数量和单价，计算商品金额 document.getElementById(total).innerHTML = ttl;//计算商品总金额 var sm = 0; //所有商品总金额，初始为0 for(var i = 0; i < shoparr; i++){//根据商品种类数，循环得到其他商品金额 var aaa = document.getElementById(n_pre+i.toString()).innerText; sm += parseInt(aaa);//将所有商品金额累加 } document.getElementById(‘sum‘).innerHTML = ‘共计：‘+sm+‘ 元‘; } //更改商品数量 function conshop(form){ var n_pre = ‘cnum‘;//获取商品数量文本域前缀 var lang = form.chk.length;//获取复选框的数量 if(lang == undefined){//如果只有一个复选框，那么将商品id和商品数量直接保存到变量中 var fst = form.chk.value; var snd = form.cnum0.value; }else{//否则将商品id和对应的商品数量保存到两个相应数组中 var fst= new Array();//商品id数组 var snd = new Array();//商品数量数组 for(var i = 0; i < lang; i++){//循环获取复选框的value值和商品数量文本框的value值 var nm = n_pre+i.toString(); var stmp = document.getElementById(nm).value; if(stmp == ‘‘ || isNaN(stmp)){ alert(‘不允许为空、必须为数字‘);//对商品数量文本框判断 document.getElementById(nm).select(); return false; } snd[i] = stmp; var ftmp = form.chk[i].value; fst[i] = ftmp; } } var url = ‘test.php?fst=‘+fst+‘&snd=‘+snd; alert(url); xmlhttp.open("GET",url,true); xmlhttp.onreadystatechange = updatecar;//调用updatecar函数 xmlhttp.send(null); } function updatecar(){//对xmlhttp对象返回值进行处理 if(xmlhttp.readyState == 4){ var msg = xmlhttp.responseText; if(msg == ‘1‘){ location=‘index.php‘; }else{ alert(‘操作失败‘+msg); } } }
实现显示订单代码：
// 显示订单 function formset(form){ var uid = form.uid.value;//获取订单提交人的名称 var n_pre = ‘cnum‘; //商品数量文本前缀 var lang = form.chk.length; //复选框个数 if(lang == undefined){ // 如果复选框只有一个 var fst = form.chk.value; //商品id var snd = form.cnum0.value; //购买数量 }else{// 如果复选框多个 var fst= new Array(); var snd = new Array(); for(var i = 0; i < lang; i++){// 循环获取商品数量和商品id var nm = n_pre+i.toString(); var stmp = document.getElementById(nm).value; if(stmp == ‘‘ || isNaN(stmp)){ alert(‘不允许为空、必须为数字‘); document.getElementById(nm).select(); return false; } snd[i] = stmp; var ftmp = form.chk[i].value; fst[i] = ftmp; } } alert(‘test.php?uid=‘+uid+‘&fst=‘+fst+‘&snd=‘+snd); // open(‘test.php?uid=‘+uid+‘&fst=‘+fst+‘&snd=‘+snd,‘_blank‘,‘width=650 height=300‘,false); }
</script>
这里实现数据处理页面的代码参考简单购物车
如在实现商品删除功能代码如下
<?php session_start(); header ( "Content-type: text/html; charset=UTF-8" ); //设置文件编码格式 require("system/system.inc.php"); //包含配置文件 /* xmlhttp返回参数 */ $reback = ‘0‘; /* 将传过来的变量以逗号分割 */ $commid = explode(‘,‘,$_GET[‘rd‘]); /* 更新数据库所需数组 */ $newshop = array(); /* 查找当前用户 */ $sql = "select id,shopping from tb_user where name = ‘".$_SESSION[‘member‘]."‘"; $rst = $admindb->ExecSQL($sql,$conn); if($rst==false){ $reback = ‘2‘; }else{ /* 将shopping字段用@分割 */ if(!empty($rst[0][‘shopping‘])){ $tmpshop = array(); $shopping = explode(‘@‘,$rst[0][‘shopping‘]); foreach($shopping as $ky => $vl){ $tmp = explode(‘,‘,$vl); $boo = false; foreach($commid as $value){ if($value == $tmp[0]){ $boo = true; } } if(!$boo){ $tmpshop[$ky] = $vl; } } if(!empty($tmpshop)){ $update = "update tb_user set shopping=‘".implode(‘@‘,$tmpshop)."‘ where name = ‘".$_SESSION[‘member‘]."‘"; }else{ $update = "update tb_user set shopping=‘‘ where name = ‘".$_SESSION[‘member‘]."‘"; } $shop = $admindb->ExecSQL($update,$conn); if($shop){ $reback = 1; }else{ $reback = 3; } } } echo $reback; ?>
去数据库修改代码如下
<?php session_start(); header ( "Content-type: text/html; charset=UTF-8" ); //设置文件编码格式 require("system/system.inc.php"); //包含配置文件 $sql = "select id,shopping from tb_user where name = ‘".$_SESSION[‘member‘]."‘"; $rst = $admindb->ExecSQL($sql,$conn);//返回热二维数组 $reback = ‘0‘; $changecar = array(); if(isset($_GET[‘fst‘]) && isset($_GET[‘snd‘])){ $fst = $_GET[‘fst‘];//商品id $snd = $_GET[‘snd‘];//商品数量 $farr = explode(‘,‘,$fst); $sarr = explode(‘,‘,$snd); $upcar = array(); for($i = 0; $i < count($farr); $i++){ $upcar[$i] = $farr[$i].‘,‘.$sarr[$i]; } if(count($farr) > 1){ $update = "update tb_user set shopping=‘".implode(‘@‘,$upcar)."‘ where name = ‘".$_SESSION[‘member‘]."‘"; }else{ $update = "update tb_user set shopping=‘".$upcar[0]."‘ where name = ‘".$_SESSION[‘member‘]."‘"; } $shop = $admindb->ExecSQL($update,$conn); if($shop){ $reback = 1; }else{ $reback = 2; } } echo $reback; ?>
代码下载链接 附上一句诗句：海到尽头天作岸，山登绝顶我为峰。加油！
标签：加油！ ati undefined response 数据处理 target lse 操作 更改
原文地址：https://www.cnblogs.com/aten/p/8945382.html
