我有 2 个正在使用的页面：第一个页面是从 php 服务器获取值并填充选择/输入的页面，第二个页面是一个对话框，它从第一页中的隐藏输入中获取值. 第一个转换打开对话框并正确获取值。之后我将值保存在 php 会话中并重新加载第一页。在此过程之后，当我再次打开对话框时，jquery 无法获取 val() 并显示未定义。我不确定这是由于重新加载页面问题还是其他原因。如果我刷新页面，那么它将再次正常工作。
<div data-role="page" id="page1">
<div data-theme="a" data-role="header">
.....
<div data-role="navbar" data-iconpos="top">
.....
</div>
<div data-theme="c" id="cashtab" data-role="content">
<div style="display:none" id="proddata" data=""></div>
<div style="display:none" id="prodstock" data=""></div>
<form id="mainsubmit" action="form.php" method="post" data-ajax="false">
<input id="formproduct" type="hidden" name="product" value=""/>
<div id="productsearch" style="width:48%; float:left; margin-right:2%;">
<label for="search">Search Product:</label><br/><br/>
<ul id="productautocomplete" data-role="listview" data-inset="true" data-filter="true" data-filter-placeholder="Select a product... (type at least 3 letters)" data-filter-theme="d"></ul>
</div>
<div id="packingselect" style=" width:23%; float:left; margin-right:2%;">
<label for="packing">Select Packing:</label>
<select name="packing" id="packing" data-iconpos="left">
</select>
</div>
<div id="qtyenter" style=" width:23%; float:left; margin-right:2%;">
<label for="quantity">Select Qty:</label>
<input type="number" data-clear-btn="true" name="quantity" id="qty" value=""/>
</div><br/><br/><br/><br/><br/><br/><br/><br/>
<div style="display:inline-block; width:33%; margin-left:33%; margin-right:33%;">
<a href="#page3" data-rel="dialog" data-role="button" >ADD</a>
</div>
</form>
</div>
</div>
<div data-role="page" id="page3" data-url="dialog.html" data-close-btn="right">
<div data-role="header">
<h1>Batch Selection</h1>
</div>
<div data-role="content">
<div style="overflow:auto;">
<table id="batchsel" style="border:1px;">
<thead>
<tr>
<th></th>
<th>Batch No</th>
<th>Exp Date</th>
<th>Brate</th>
<th>Srate</th>
<th>Packing</th>
<th>Stock</th>
<th>Supplier</th>
<th>ST%</th>
<th>Bill Date</th>
<th>Bill No</th>
<th>btax</th>
</tr>
</thead>
<!--data populated from server once the values from first page is read properly.
<!-- currently not loading the second time as unable to fetch val() -- >
<tbody>
</tbody>
</table>
</div>
<div id="remainingdata">
<p1 id="changeable_requirements"></p1>
<!-- function the send the checked checkboxes relavent info to store in session -->
<button id="saveprod" onclick="addProduct(); return false;">Add Product</button>
</div>
</div>
</div>
<script>
$( document ).on( "pageinit", "#page1", function() {
//for product select autopopulate -- working //
$("#productautocomplete").live( "listviewbeforefilter", function ( e, data ) {
var $ul = $( this ),$input = $( data.input ),value = $input.val(),html = "";
$ul.html( "" );
if ( value && value.length > 2 ) {
$ul.html( "<li><div class='ui-loader'><span class='ui-icon ui-icon-loading'></span></div></li>" );
$ul.listview( "refresh" );
$.getJSON('ajax/getProductList.php', {term:$input.val()}, function(data) {
var items = [];
var str = "";
for (var key in data) {
if (data.hasOwnProperty(key)) {
var value = data[key].value;
var label = data[key].label;
var stock = data[key].stock;
var proddata = data[key].data;
str += '<li code="'+value+'" name="'+label+'" stock="'+stock+'" data="'+proddata+'">';
str += '<a data-ajax="false" rel="external">'+label+' [ '+stock+' ]</a>';
str += '</li>';
}
}
$ul.html( str );
$ul.listview( "refresh" );
$ul.trigger( "updatelayout" );
});
}
});
//end search
//on click set hidden input fields to be used in dialog box. -- working
$('#productautocomplete li').live('click', function(e) {
//--------------------fetch data ------------------------
var id = $(this).attr('code');
var name = $(this).attr('name');
var data = $(this).attr('data');
var stock = $(this).attr('stock');
//add packaging type and unit info to div data
$('#proddata').attr('data',data);
//add currstock info to div
$('#prodstock').attr('data',stock);
//----------------------hide list
$('#productautocomplete li').hide();
//----------------------place name in visible input box
$('#productsearch input').attr('value',name);
//----------------------place id in hidden input box for the actual form.
$('#formproduct').val(id);
//----------------------fill options for package + show select package div
var filteroptions = data.split(",");
$('#packing option').remove();
for (var x=0; x<3 ; x++) {
var eachoption = filteroptions[x].split(":");
//if unit wise option is less than that of stock show as option.
if (eachoption[0]!="0" && eachoption[0] <= stock.valueOf()) {
$('#packing').append($('<option>', {
value: eachoption[0]+':'+eachoption[1],
text : eachoption[1]+' [ '+eachoption[0]+' ] '
}));
}
}
});
});
//this is where the problem lies ..
//have tried with pageinit.. but that only calls it once.
$( document ).on( "pageshow", "#page3", function() {
$('#batchsel tbody').empty();
// !!!!!!!!!!!!!!!!!!!!!!! // !!!!!!!!!!!!!!!!!!!!!!! //
//doesnt fetch any of 4 following values after pageChange back to page1.
//not sure if this is due to how i'm reloading the page1.
//see function addProduct below.
var prodcode = $('#formproduct').val(); //
var prodstock = $('#prodstock').attr('data');
var prodqty = $('#qty').val();
var packing = $('#packing').find(":selected").val();
//returns undefined
alert(prodcode); alert(packing); alert(prodqty);
//always ends here when dialog opens second time.
if (!prodcode || !packing || !prodqty) {
alert("Please give all required information");
//does not close also when opens the second time.
$('#page3').dialog('close');
}
var packinginfo = packing.split(":");
var totalrequired = prodqty * packinginfo[0];
//alert(packinginfo[1]);alert(totalrequired);
if (totalrequired > prodstock ) {
alert("Not enough Stock");
$('#page3').dialog('close');
} else {
//------------------------------ Getting Batch Info ---------------------------------------------------
var rows = '';
$.getJSON('ajax/getBatchDetails.php', {code:prodcode,pack:packinginfo[1],qty:totalrequired}, function(data) {
for (var key in data) {
if (data.hasOwnProperty(key)) {
//alert (data[key].Batch);
rows += '<tr><td><input type="checkbox" class="batchcheckbox" id="batchcheckbox_'+data[key].BatchId+'" value="'+data[key].BatchId+':'+data[key].Stock+'" onchange="resetRemainingQty(this.value);""/></td><td>' + data[key].Batch + '</td><td>' + data[key].ExDt +'</td><td>' + data[key].BRate + '</td><td>' + data[key].SRate + '</td><td>' + data[key].Pack + '</td><td>' + data[key].Stock + '</td><td>' + data[key].Supname + '</td><td>' + data[key].Stax + '</td><td>' + data[key].BillDt + '</td><td>' + data[key].BillNo + '</td><td>' + data[key].btax + '</td><tr>';
}
}
$('#batchsel tbody').append(rows);
//add remaining amount in the data field of p1.
$('#remainingdata p1').attr('data',totalrequired);
$('#remainingdata p2').attr('data',totalrequired);
$('#remainingdata p1').html("<h4>Remaining Amount : "+totalrequired+"</h4>");
});
//---------------------------------------------end batch info display: -----------------------------------
}
});
function addProduct() {
//--------code info---------
var prodcode = $("#formproduct").val(); // to send
//--------packing info---------------
var packing = $('#packing').find(":selected").val();
var packinginfo = packing.split(":");
//-----------qty req ---------------------
var prodqty = $('#qty').val();
var totalrequired = prodqty * packinginfo[0]; // to send
//-------------batch info -----------
var allbatchids = "";
$('.batchcheckbox').each(function() {
if($(this).is(':checked')){
var data = $(this).val();
var datasplit = data.split(":");
var batchid = datasplit[0];
allbatchids += batchid+":";
}
});
allbatchids = allbatchids.substring(0, allbatchids.length - 1); // to send
alert(prodcode+",,"+packinginfo[1]+",,"+totalrequired+",,"+allbatchids);
//-------------- send to server to save to session ---------
$.getJSON('ajax/saveProductSession.php', {code:prodcode,pack:packinginfo[1],qty:totalrequired,batch:allbatchids}, function(data) {
if (data.error == "1") {
alert(data.message);
} else {
/// !!!!!!!! !!!!!!!!!!!!!!! !!!!!!!!!!!!!!!
///
/// the loads the page1. but jquery doesnt take val() after this.
///tried multiple variations of this but to no effect.
///removed all options.. redirect to main.php.. reloadpage:false.. etc.
///Any other way to reload the page so that the dialog once open again can
///get the values from the page1 again.
$.mobile.changePage("#page1", { reloadPage: true , dataUrl : "page1", reverse : true, changeHash: true } );
}
});
//
// $.ajax({
// type: "POST",
// url: "ajax/saveProductSession.php",
// data: { code:prodcode,pack:packinginfo[1],qty:totalrequired,batch:allbatchids }
// }).done(function() {});
}
</script>