使用jQuery更改下拉列表的选定值 [英] Change the selected value of a drop-down list with jQuery
问题描述
我有一个包含已知值的下拉列表。我想要做的是将下拉列表设置为我知道使用jQuery存在的特定值。使用常规JavaScript,我会做类似的事情:
I have a drop-down list with known values. What I'm trying to do is set the drop down list to a particular value that I know exists using jQuery. Using regular JavaScript, I would do something like:
ddl = document.getElementById("ID of element goes here");
ddl.value = 2; // 2 being the value I want to set it too.
但是,我需要用jQuery做这个,因为我正在为我的选择器使用CSS类(愚蠢的 ASP.NET 客户端ID ...)。
However, I need to do this with jQuery, because I'm using a CSS class for my selector (stupid ASP.NET client ids...).
以下是我尝试过的一些事情:
Here are a few things I've tried:
$("._statusDDL").val(2); // Doesn't find 2 as a value.
$("._statusDDL").children("option").val(2) // Also failed.
如何使用jQuery进行操作?
How can I do it with jQuery?
更新
事实证明,我第一次做对了:
So as it turns out, I had it right the first time with:
$("._statusDDL").val(2);
当我在上方发出警报时,它工作正常,但当我删除警报并让它运行时全速,我收到错误
When I put an alert just above it works fine, but when I remove the alert and let it run at full speed, I get the error
无法设置所选属性。索引无效
Could not set the selected property. Invalid Index
我不确定这是jQuery还是Internet Explorer 6的错误(我猜的是Internet Explorer 6),但它非常烦人。
I'm not sure if it's a bug with jQuery or Internet Explorer 6 (I'm guessing Internet Explorer 6), but it's terribly annoying.
推荐答案
jQuery的文档声明:
[jQuery.val]检查或 选择 ,所有单选按钮,复选框,并选择与该组值匹配的选项。
[jQuery.val] checks, or selects, all the radio buttons, checkboxes, and select options that match the set of values.
此行为在 jQuery
版本 1.2
及以上。
你最有可能想要这个:
$("._statusDDL").val('2');
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