使用Javascript从动态下拉列表中捕获选定的值 [英] Capture Selected Values from Dynamic Drop-down Lists using Javascript

问题描述

我正在尝试从表单中的动态下拉列表中获取值，但是我的代码无法正常工作.

I'm trying to get the value from dynamic drop-down list in my form, but my code isn't working.

View.php

<div class="input_fields_wrap">
    <input type="button" class="btn btn-info add_field_button" value="Tambah Cara Pengolahan" /> <br /><br />
</div>
<div class="service-container" data-service=
    "<div class='form-group'>
        <select class='form-control' style='width:88%; display:inline-block; margin-right:10px;' name='cara_pengolahan[]' required>
            <option value=''>No Selected</option>
            <?php foreach($pengolahan as $row):?>
            <option value='<?php echo $row->id_pengolahan;?>'><?php echo $row->cara_pengolahan;?></option>
            <?php endforeach;?>></div>
        </select>
        <button class='btn btn-danger closebtn remove_field'><b>&times</b></button>
    </div>"
</div>

Javascript.js

Javascript.js

$('.service-container').each(function() {
    var container = $(this);
    var service = container.data('service');
    // Service variable now contains the value of html + php variable;  

    var max_fields      = 10; //maximum input boxes allowed
    var wrapper         = $(".input_fields_wrap"); //Fields wrapper
    var add_button      = $(".add_field_button"); //Add button ID

    var x = 1; //initlal text box count
    $(add_button).click(function(e){ //on add input button click
        e.preventDefault();
        if(x < max_fields){ //max input box allowed
            x++; //text box increment
            $(wrapper).append(service);
        }
    });

    $(wrapper).on("click",".remove_field", function(e){ //user click on remove text
        e.preventDefault();
        $(this).parent('div').remove();
        x--;
    })
});
var cara_pengolahan = document.forms[0].elements["cara_pengolahan[]"];
if(typeof cara_pengolahan !== 'undefined'){
    for (var i=0; i<cara_pengolahan.length; i++) {
        console.log(cara_pengolahan[i].value);
    }
}

当有一个动态下拉列表时，它返回它的所有数组值.但是我想要捕获的是该下拉列表的选定值.

When there is one dynamic drop-down list, it returns all the array values of it. But what I want is to capture the selected value of that drop-down list.

并且当有多个动态下拉列表时，它将返回该下拉列表的正确选择值.

And when there are more than one dynamic drop-down lists, it returns the correct selected values of that drop-down lists.

如何捕获所有动态下拉列表中的选定值? 预先感谢.

How to capture the selected value of all the dynamic drop-down lists? Thanks in advance.

推荐答案

要检查是否存在动态下拉列表，可以简单地检查选择器是否存在 与

To check if there is a dynamic Drop down you can simple check if the selector exists with

 $('#elemId').length>0

对于选定的值，您可以使用$(#selectorid").find("option:selected").val();

And for selected value you can use $("#selectorid").find("option:selected").val();

这篇关于使用Javascript从动态下拉列表中捕获选定的值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！