所以我正在研究这个项目，我使用的是一个以Windows CE 5.0为操作系统的条形码扫描仪。每当我扫描条形码时，页面会自动刷新，而不应该刷新。在扫描条形码之后，用户应该能够输入数量的数字，然后用户将单击预览按钮，该按钮将用户带到另一页面。我已经在网上搜索了这个问题的解决方案，但仍然无效。请帮忙。谢谢。
<?php
include("webconfig.php");
ob_start();
session_start();
if(!isset($_SESSION["USER_CODE"]) || $_SESSION["ACTIVE"] == '0')
header("location:login.php");
$barcode = $_REQUEST["barcode"];
$item_desc = $_REQUEST["item_desc"];
$price = $_REQUEST["price"];
$quantity = $_REQUEST["txtQty"];
$pricef = number_format($price, 2);
$sql = ibase_query($conn, "SELECT * FROM ITEM_MASTER WHERE ITEM_CODE = '$barcode'") or die(ibase_errmsg());
$row = ibase_fetch_assoc($sql);
$imgname = $row['IMGNAME'];
?>
<!DOCTYPE html>
<html>
<head>
<link href="docs/css/metro.css" rel="stylesheet">
<link href="docs/css/metro-icons.css" rel="stylesheet">
<link href="docs/css/docs.css" rel="stylesheet">
<script src="docs/js/jquery-2.1.3.min.js"></script>
<script src="docs/js/metro.js"></script>
<script src="docs/js/docs.js"></script>
<script src="docs/js/prettify/run_prettify.js"></script>
<script src="docs/js/ga.js"></script>
<script src="js/jquery.js"></script>
<script src="js/jquery.ajaxcomplete.js"></script>
<script type="text/javascript" src="keyboard.js" charset="UTF-8"></script>
<link rel="stylesheet" type="text/css" href="keyboard.css">
<link rel="shortcut icon" href="_img/assigns-favicon.PNG">
<title>Albert Smith Signs - Warehouse Inventory System</title>
</head>
<body>
<div class="page-content">
<div class="align-center">
<div class="container">
<!-- Default -->
<div class="panel">
<div class="content">
<div class="grid">
<div class="row cells12">
<!-- Default -->
<div class="panel">
<div class="heading">
<span class="title">ENTER QUANTITY</span>
</div>
<div class="content">
<div class="grid">
<div class="row cells12">
<div class="cell colspan12">
<form onsubmit="return false;" method="post">
<label>Enter Quantity</label>
<br />
<div class="input-control text full-size" placeholder="Type search keyword here" data-role="input">
<!-- <input name="txtQty" class="keyboardInput" style="width: 225px;" type="text" value="1" autocomplete="off" /> -->
Scan Barcode
<input name="txtBarcode" id="ip" type="text" autofocus />
<br />
<br />
Enter Quantity
<input name="txtQty" id="next" type="text" />
</div>
<div class="cell colspan12">
<hr>
<br />
<br />
<br />
<br />
<br />
<input type="submit" onsubmit="return true;" name="btnPreview" style="width:80px; height:50px;" class="button primary rounded large-button" value="Preview" />
</div>
</div>
<?php
if(isset($_POST['btnPreview']) && $_POST['txtQty'] > 0)
{
$quantity = $_POST['txtQty'];
$barcode = $_POST['txtBarcode'];
$sql = "SELECT * FROM ITEM_MASTER WHERE ITEM_CODE = '$barcode'";
$query = ibase_query($conn, $sql) or die(ibase_errmsg());
if ($row = ibase_fetch_assoc($query))
{
$item_desc = $row['ITEM_DESC'];
$price = $row['COST'];
header("location:preview.php?barcode=$barcode&quantity=$quantity&item_desc=$item_desc&price=$price");
}
else{
echo "Barcode not found";
}
}
?>
</form>
<div class="cell colspan1">
</div>
</div>
</div>
</div>
</div><!-- panel -->
</div><!-- row cells12 -->
</div><!-- grid -->
</div><!-- content -->
</div><!-- panel -->
</div>
</div>
</div>
<script>
//$("#ip").focus();
/*var d = false;
$("#ip").on('change', function(){
//$("#ip").keyup(function(){
if(d == false){
$(".block").animate({"top": "-=50px"});
d = true;
}
var v = $(this).val();
$(".res").html("Search results for " + v );
$("#next").focus();
});*/
$("#ip").focus();
function init() {
key_count_global = 0; // Global variable
document.getElementById("ip").onkeypress = function() {
key_count_global++;
setTimeout("lookup("+key_count_global+")", 1000);//Function will be called 1 second after user types anything. Feel free to change this value.
}
}
window.onload = init; //or $(document).ready(init); - for jQuery
function lookup(key_count) {
if(key_count == key_count_global) { // The control will reach this point 1 second after user stops typing.
// Do the ajax lookup here.
$("#next").focus();
}
}
</script>
</body>
</html>