ecshop的购物车使用是相当的不方便．ecshop购物车一旦加入了商品，就必须点更新数量的按扭才能够更新．这样对ecshop使用者相当的不方便。我们将结合ecshop ajax的思路。来讲讲用ecshop的ajax无刷新更新购物车.

1:首先要包含js/shopping_flow.js 该文件主要是针对ecshop购买流程控制的js.我们将增加以下函数．

function submit_update_cart(rec_id){

var goods_number = document.getElementById("goods_number_"+rec_id).value;

Ajax.call('flow.php?step=ajax_update_cart', 'goods_number=' + goods_number+'&rec_id='+rec_id, submit_update_cartResponse_cart, 'GET', 'JSON');

}

2:在flow.dwt中。我们要修改input输入框．<input type="text" name="goods_number[{$goods.rec_id}]" id="goods_number_{$goods.rec_id}"

3:在ecshop的购物车函数中。什么json来结合ecshop ajax处理更新结果．部分程序如下

include_once('includes/cls_json.php');

$result = array('error' => '', 'content' => '', 'fanliy_number' => '0', 'rec_id' => '');

$json = new JSON();

/* AJAX修改购物车 */

$rec_id = $_REQUEST['rec_id']; //购物车ID

$goods_number = $_REQUEST['goods_number'];//

/* 判断库存 */

$num = $db -> getOne("select g.goods_number from ".$ecs->table('goods')." g ,".$ecs->table('cart')." c where c.rec_id = '$rec_id' and g.goods_id = c.goods_id ");

if($goods_number > $num){

$goods_number = $num;

$result['error'] = 1;

$result['fanliy_number']= $num;

$result['rec_id'] = $rec_id;

$result['content'] = '该商品库存不足'.$goods_number." 件,只有".$num."件";

die($json->encode($result));

}

/* 修改商品购物车 */

$sql = "update ".$ecs->table('cart')." set goods_number = '".$goods_number."' where rec_id = '".$rec_id."' and session_id = '" . SESS_ID . "' ";

$db -> query($sql);

4:通过flow.php中的php．返回更新数量后的结果．

function submit_update_cartResponse_cart(result){

if(result.error == '1'){

document.getElementById("goods_number_"+result.rec_id).value = result.fanliy_number;

alert(result.content)

}else{

var layer = document.getElementById("xianshi_price");

layer.innerHTML = (typeof result == "object") ? result.content : result;

}

}

通过以上ecshop二次开发例子，我们完成了ecshop购物车无刷新更新。