javascript 如何在组合框中获取选定的值？
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How to get selected value in combo box?
提问by Sandra Schlichting
If I have a form like this.
如果我有这样一个形式，这样。
<form name="myform" action="" method="POST">
<select name="mydropdown">
<option value="A">AAA</option>
<option value="B">BBB</option>
<option value="C">CCC</option>
</select>
</form>
For radio buttons I would do
对于单选按钮，我会做
var type = $(this).find('input:radio[name="ctype"]:checked').val() || '';
but this can't I get to work on combo boxes.
但这不能在组合框上工作。
How can I get the value of the selected option in a combo box?
如何获取组合框中所选选项的值？
Update
更新
It is called on a webpage with many forms, so I need the selected value from thisparticular combo box.
它在具有多种形式的网页上被调用，因此我需要从this特定组合框中选择的值。
Here is how I get the values from text boxes and radio buttons.
这是我从文本框和单选按钮获取值的方法。
$('form').live('submit', function(){
var title = this.elements.title.value;
var type = $(this).find('input:radio[name="ctype"]:checked').val() || '';
var sect = ?
...
采纳答案by leandre_b
Simply :
简单地 ：
$('select[name="mydropdown"]').val();
UPDATE:
更新：
And when inside one of the forms :
当在其中一种形式中时：
$('form').live('submit', function(){
var value_of_dropdown = $(this).find('select[name="mydropdown"]').val();
...
回答by DrStrangeLove
$('select[name="mydropdown"] option:selected').val()
UPDATE:
更新：
$('form').live('submit', function(){
var value_of_dropdown = $(this).find('select[name="mydropdown"] option:selected').val();
...
});
回答by brezanac
For select boxes its enough to use val()to get the selected value.
对于选择框，它足以val()用于获取所选值。
$('select[name="mydropdown"]').val();
EDIT:I edited the response because I could have sworn there was an id named mydropdown:)
编辑：我编辑了回复，因为我可以发誓有一个名为mydropdown的 id :)
回答by Chakavak Behzad
Get value selected with javascript:
获取使用 javascript 选择的值：
var countsw=document.getElementById("controlid").options[document.getElement.getElementById("controlid").selectedIndex].value;
With this code you can get value selected combobox even if client-side control has this attribute runat="server"that use in server-side.
使用此代码，即使客户端控件具有runat="server"在服务器端使用的此属性，您也可以获得选定的组合框的值。
回答by abhijit
$('select[name="mydropdown"]').change(function() {
$('select[name="mydropdown"]').val();
});
回答by jAndy
Using jQuery, just go for it like:
使用 jQuery，就像这样：
$('select').val();
