blocks|key|1346329|text|这是与您的代码等效的jQuery。不过，还有更优雅的解决方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1346330|var+values+=+[];

$(lb).children('option').each(function+()+{
+++values.push($(this).text());
});

$(txtfield).val(values.join(','));|code-block|syntax|javascript|1346331|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>This is the jQuery equivalent to your code. There are more elegant solutions, though.</p>

<pre><code>var values = [];

$(lb).children('option').each(function () {
   values.push($(this).text());
});

$(txtfield).val(values.join(','));
</code></pre>


blocks|key|3658132|text|txtfield.value+=+$(lb.options).map(function()+{+
+++++++++++++++++++++++++++++++++++++++return+this.value;+
+++++++++++++++++++++++++++++++++++}).get().join(',');|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3658133|此uses+.map()通过返回每个数组的value来创建一个option对象，然后使用uses+.get()从对象中提取数组。|unstyled|offset|length|style|CODE|3658134|3658135|编辑：正如@Nick+Craver在下面的评论中指出的那样，如果您需要获得最佳性能(使用jQuery)，使用the+$.map()+variation会更有意义，因为您已经有了一个集合。See+his+answer获取详细信息。|BOLD|3658136|3658137|编辑：为了获得更好的性能，执行for循环，但是缓存对属性的引用。It+makes+a+difference。|3658138|var+arr+=+[],+opts+=+lb.options,+len+=+opts.length;
for+(var+i+=+0;+i+<+len;+i%2B%2B)+{
++++arr[i]+=+opts[i].value;
}
txtfield.value+=+arr.join(',');|3658139|entityMap|0|LINK|mutability|MUTABLE|url|http://api.jquery.com/map/|1|http://api.jquery.com/get/|2|https://stackoverflow.com/users/13249/nick-craver|3|http://api.jquery.com/jquery.map/|4|https://stackoverflow.com/questions/4199826/idiomatic-jquery-to-get-all-options-in-a-listbox-into-comma-separated-string/4199864#4199864|5|http://jsperf.com/map-vs-jquery-map/3^0|0|6|6|L|5|V|6|1D|6|1|B|0|18|B|1|0|0|0|3|1M|7|5|C|2|1I|L|3|2L|E|4|0|0|0|3|F|3|Z|I|5|0|0^^$0|@$1|2|3|4|5|6|7|1B|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|1C|8|@$G|1D|H|1E|I|J]|$G|1F|H|1G|I|J]|$G|1H|H|1I|I|J]|$G|1J|H|1K|I|J]]|9|@$G|1L|H|1M|1|1N]|$G|1O|H|1P|1|1Q]]|A|$]]|$1|K|3|-4|5|F|7|1R|8|@]|9|@]|A|$]]|$1|L|3|M|5|F|7|1S|8|@$G|1T|H|1U|I|N]|$G|1V|H|1W|I|J]]|9|@$G|1X|H|1Y|1|1Z]|$G|20|H|21|1|22]|$G|23|H|24|1|25]]|A|$]]|$1|O|3|-4|5|F|7|26|8|@]|9|@]|A|$]]|$1|P|3|Q|5|F|7|27|8|@$G|28|H|29|I|N]|$G|2A|H|2B|I|J]]|9|@$G|2C|H|2D|1|2E]]|A|$]]|$1|R|3|S|5|6|7|2F|8|@]|9|@]|A|$B|C]]|$1|T|3|-4|5|F|7|2G|8|@]|9|@]|A|$]]]|U|$V|$5|W|X|Y|A|$Z|10]]|11|$5|W|X|Y|A|$Z|12]]|13|$5|W|X|Y|A|$Z|14]]|15|$5|W|X|Y|A|$Z|16]]|17|$5|W|X|Y|A|$Z|18]]|19|$5|W|X|Y|A|$Z|1A]]]]

<pre><code>txtfield.value = $(lb.options).map(function() { 
                                       return this.value; 
                                   }).get().join(',');
</code></pre>

<p>This <a href="http://api.jquery.com/map/" rel="nofollow noreferrer">uses <code>.map()</code></a> to create a jQuery object by returning the <code>value</code> of each <code>option</code>, then <a href="http://api.jquery.com/get/" rel="nofollow noreferrer">uses <code>.get()</code></a> to extract the Array from the object.</p>

<hr>

<p><strong>EDIT:</strong> As <a href="https://stackoverflow.com/users/13249/nick-craver">@Nick Craver</a> noted in the comment below, if you need to get optimal performance (with jQuery), it makes more sense to use <a href="http://api.jquery.com/jquery.map/" rel="nofollow noreferrer">the <code>$.map()</code> variation</a> since you already have a collection. <a href="https://stackoverflow.com/questions/4199826/idiomatic-jquery-to-get-all-options-in-a-listbox-into-comma-separated-string/4199864#4199864">See his answer</a> for details.</p>

<hr>

<p><strong>EDIT:</strong> To get better performance, do your <code>for</code> loop, but cache the references to the properties. It <a href="http://jsperf.com/map-vs-jquery-map/3" rel="nofollow noreferrer">makes a difference</a>.</p>

<pre><code>var arr = [], opts = lb.options, len = opts.length;
for (var i = 0; i &lt; len; i++) {
    arr[i] = opts[i].value;
}
txtfield.value = arr.join(',');
</code></pre>


blocks|key|1348106|text|jQuery版本是这样的.map()：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1348107|var+arr+=+$(lb).find("option").map(function()+{+return+this.value;+}).get();
txtfield.value+=+arr.join(',');|code-block|syntax|javascript|1348108|或者像这样使用$.map()会更快一些：|1348109|var+arr+=+$.map(lb.options,+function(o)+{+return+o.value;+});
txtfield.value+=+arr.join(',');|1348110|然而，这两个都是的，效率明显低于for循环，请使用您已有的普通JavaScript版本。|BOLD|1348111|entityMap|0|LINK|mutability|MUTABLE|url|http://api.jquery.com/map/|1|http://api.jquery.com/jQuery.map/^0|C|6|C|6|0|0|0|7|7|7|7|1|0|0|8|1|G|3|0^^$0|@$1|2|3|4|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@$9|14|A|15|1|16]]|E|$]]|$1|F|3|G|5|H|7|17|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|18|8|@$9|19|A|1A|B|C]]|D|@$9|1B|A|1C|1|1D]]|E|$]]|$1|M|3|N|5|H|7|1E|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|1F|8|@$9|1G|A|1H|B|Q]|$9|1I|A|1J|B|C]]|D|@]|E|$]]|$1|R|3|-4|5|6|7|1K|8|@]|D|@]|E|$]]]|S|$T|$5|U|V|W|E|$X|Y]]|Z|$5|U|V|W|E|$X|10]]]]

<p>The jQuery version is <a href="http://api.jquery.com/map/" rel="noreferrer"><code>.map()</code></a> like this:</p>

<pre><code>var arr = $(lb).find("option").map(function() { return this.value; }).get();
txtfield.value = arr.join(',');
</code></pre>

<p>Or a bit faster with <a href="http://api.jquery.com/jQuery.map/" rel="noreferrer"><code>$.map()</code></a> like this:</p>

<pre><code>var arr = $.map(lb.options, function(o) { return o.value; });
txtfield.value = arr.join(',');
</code></pre>

<p>However, both are <strong>significantly less efficient</strong> than a <code>for</code> loop, go with the plain JavaScript version you already have.</p>


blocks|key|2090560|text|看看map()..|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2090561|$('#lbID+option').map(function()+{
++return+$(this).val();
}).get().join(',');|code-block|syntax|javascript|2090562|entityMap|0|LINK|mutability|MUTABLE|url|http://api.jquery.com/map/^0|2|5|2|5|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

<p>Look at <a href="http://api.jquery.com/map/" rel="noreferrer"><code>map()</code></a>..</p>

<pre><code>$('#lbID option').map(function() {
  return $(this).val();
}).get().join(',');
</code></pre>


blocks|key|2094870|text|可以这样做，但是我不确定你想要达到什么目的？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2094871|$('option',+$(lb)).each(function()+{+arr.push($(this).text())+});|code-block|syntax|javascript|2094872|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>Could do it like this but I'm not sure what you're trying to achieve?</p>

<pre><code>$('option', $(lb)).each(function() { arr.push($(this).text()) });
</code></pre>


blocks|key|5069479|text|请在此处查看演示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5069480|您可以使用分隔符获取多个选定的选项文本值。|5069481|​|5069482|+$('#testID').change(function+()+{
++++++++var+test=$(this).find("option:selected").map(function+()+{
++++++++return+$(this).text();
++++}).get().join('//');
+++++alert(test);
++++++++++++});|code-block|syntax|javascript|5069483|<script+src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<select+id="testID"+multiple="multiple">
++++<option+value="1">test+Value1</option>
++++<option+value="2">test+Value2</option>
++++<option+value="3">test+Value3</option>
++++<option+value="4">test+Value4</option>
++++<option+value="5">test+Value5</option>
++++<option+value="6">test+Value6</option>
</select>
<input+type="button"+value="Get+dropdown+selected+Value"+id="select-values">
++++<div+id="result"></div>|5069484|5069485|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|S|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|H|7|T|8|@]|9|@]|A|$I|J]]|$1|M|3|E|5|6|7|U|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|O|$]]

<p>See demo here: <a href="http://jsfiddle.net/938n3h87/" rel="nofollow"><strong>Fiddler Demo</strong></a></p>

<p>you can get the multiple selected option Text values with separator. </p>

<p><div class="snippet" data-lang="js" data-hide="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code> $('#testID').change(function () {
        var test=$(this).find("option:selected").map(function () {
        return $(this).text();
    }).get().join('//');
     alert(test);
            });</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"&gt;&lt;/script&gt;
&lt;select id="testID" multiple="multiple"&gt;
    &lt;option value="1"&gt;test Value1&lt;/option&gt;
    &lt;option value="2"&gt;test Value2&lt;/option&gt;
    &lt;option value="3"&gt;test Value3&lt;/option&gt;
    &lt;option value="4"&gt;test Value4&lt;/option&gt;
    &lt;option value="5"&gt;test Value5&lt;/option&gt;
    &lt;option value="6"&gt;test Value6&lt;/option&gt;
&lt;/select&gt;
&lt;input type="button" value="Get dropdown selected Value" id="select-values"&gt;
    &lt;div id="result"&gt;&lt;/div&gt;</code></pre>
</div>
</div>
</p>


<p>Where lb is a listbox, txtfield is a textbox, this code takes all the values of the options, puts them in an array and makes it into a comma-separated list:</p>

<pre><code>var arr = [];
for (var i = 0; i &lt; lb.length; i++) {
    arr[i] = lb.options[i].value;
}
txtfield.value = arr.join(',');
</code></pre>

<p>lb.options.toString() obviously doesn't work because it's an array of options (value and text).  I haven't found anything more succint than this.</p>

<p>What's the jQuery way to do this?  I tried messing around with <code>$(lb).each()</code>, but can't seem to get it to work in the same way.</p>


Idiomatic jQuery to get all options in a listbox into comma-separated string?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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其中lb是一个列表框，txtfield是一个文本框，下面的代码获取选项的所有值，将它们放入一个数组中，并将其放入一个逗号分隔的列表中：var arr = [];for (var i = 0; i < lb.length; i++) {    arr[i] = lb.options[i].value;}txtfield....

问习惯使用jQuery将列表框中的所有选项转换为逗号分隔的字符串？
EN

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问习惯使用jQuery将列表框中的所有选项转换为逗号分隔的字符串？EN