我想把option的onchange功能放在select回圈中。特別是for我id用增量變數更改選擇標記的回圈。selectHTML 中的標記也在回圈中，其 id 通過遞增的 PHP 變數而變化
$(function() {
var row = document.getElementById("comments").textContent;
var text = 1;
for (var i = 1; i <= row; i ) {
$('#part').html(text).change(function() {
var display = $('#part').html(text).find(":selected").val();
$('#resone').val(display);
})
text ;
}
})
Item Name Price Qty Total
<td>Discount</td>
</tr>
<?php
$sql = "SELECT * FROM order_item WHERE order_id = {$edit['order_id']}";
$rs = mysqli_query($con, $sql);
$count = 1;
$counts = mysqli_num_rows($rs);
while ($row = mysqli_fetch_assoc($rs))
{ ?>
<div id="comments" hidden>
<?php echo $counts; ?>
</div>
<tr>
<td><input type="text" readonly="readonly" id="resone"></td>
<td>
<?php echo ucfirst(getProductNameFromId($con, $row['product_id']));?>
</td>
<td>
<?php echo $row['rate']; ?>
</td>
<td>
<?php echo $row['quantity']; ?>
</td>
<td>
<?php echo $row['total']; ?>
</td>
<td id="as">
<select name="artist_1" id="part<?php echo $count; ?>">
<option value="" disabled selected>Select Category</option>
<option value="1">lawa</option>
<option value="2">laaswa</option>
</select>
</td>
</tr>
<?php
$count ;
} ?>
</table>
uj5u.com熱心網友回復：
<?php
$gategory = $_GET["gategory"];
$sql = "SELECT * FROM order_item WHERE order_id = {$edit['order_id']}";
$rs = mysqli_query($con, $sql);
$count = 1;
$counts = mysqli_num_rows($rs);
while ($row = mysqli_fetch_assoc($rs))
{ ?>
<div id="comments" hidden>
<?php echo $counts; ?>
</div>
<tr>
<td><input type="text" readonly="readonly" id="resone"></td>
<td>
<?php echo ucfirst(getProductNameFromId($con, $row['product_id']));?>
</td>
<td>
<?php echo $row['rate']; ?>
</td>
<td>
<?php echo $row['quantity']; ?>
</td>
<td>
<?php echo $row['total']; ?>
</td>
<td id="as">
<select name="artist_1" id="part<?php echo $count; ?>">
<option value="" disabled selected>Select Category</option>
<option value="1">lawa</option>
<option value="2">laaswa</option>
</select>
</td>
</tr>
<?php
$count ;
} ?>
</table>
<script>
$(document).ready(function () {
$(".category").on('change', function(){
var value = $('select[name=artist_1] option').filter(':selected').val()
window.location.href="index.php?gategory=" value;
});
</script>
uj5u.com熱心網友回復：
當你在里面做一個 html 回圈時要小心：id 必須是唯一的。這就是 javascript 不起作用的原因??
您可以使用 getElementsByClassName 然后您可以迭代每個以放置事件偵聽器
轉載請註明出處，本文鏈接：https://www.uj5u.com/gongcheng/315370.html