Question

<?php for($i = 1; $i <=5; $i++ ){?>
    <tr id="row">
      <td class="input-field col s2">
       <label>Week Days</label>
        <select id="week_days<?php echo $i;?>" data-rel="chosen" name="week_days<?php echo $i;?>[]" class="form-control" multiple="multiple">
                <option value="1">Monday</option>
                <option value="2">Tuesday</option>
                <option value="3">Wednesday</option>
                <option value="4">Thursday</option>
                <option value="5">Friday</option>
                </select>
              </td>   
                </tr>
   <?php } ?>
<a id="more_btn" class="right" href="javascript:void(0);"><img src="../../assets/images/icons/add-icon.ico" width="23px" title="Add More"/></a>

如何使用jquery获取option的值？

问题是我在点击锚标记上得到了一个空值。适当是获得期权价值的正确方法。第一个用户选择一个星期一选项，然后单击添加更多锚标记，然后在警报中显示正确的1个值，但是当用户更改一个选项并单击添加更多锚标记，然后警报将其显示为空。为什么显示空而不是1,2,3,4,5？

<script type="text/javascript">
 var j=1;
 $('#more_btn').click(function() {
   j++;
   var u = j-1;
   var prev_weekdays = $('#week_days'+u).val();
   alert(prev_weekdays);
 });
 </script>

Answer 1

当more_btn链接单击时，获取选定的工作日值并发出警报，请参见示例例如-

<script type="text/javascript">

 $('#more_btn').click(function() {
    var prev_weekdays = $('#week_days').find(":selected").text();
    alert(prev_weekdays);
 });
 </script>

将您的选择设为

<select id="week_days" data-rel="chosen"  class="form-control" multiple="multiple">
            <option value="1">Monday</option>
            <option value="2">Tuesday</option>
            <option value="3">Wednesday</option>
            <option value="4">Thursday</option>
            <option value="5">Friday</option>
            </select>

告诉我这是否有效

Answer 2

希望这可以解决您的问题

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>jQuery Get Values from Multiple Select Box</title>
<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$("button").click(function(){
    var countries = [];
    $.each($(".country option:selected"), function(){            
        countries.push($(this).val());
    });
    alert("You have selected the country - " + countries.join(", "));
});
});
</script>
</head>
<body>
<p>Press control key (Ctrl) to select multiple values:</p>
<form>
    <label>Country:</label>
    <select class="country" multiple="multiple" size="5">
        <option value="1">United States</option>
        <option value="2">India</option>
        <option value="3">United Kingdom</option>
        <option value="4">Brazil</option>
        <option value="5">Germany</option>
    </select>
    <button type="button">Get Values</button>
</form>
</body>
</html>

使用jQuery获取多个选择标签中的选项值

2 个答案: