使用Javascript载入下拉值
[英]Using Javascript to load dropdown values
问题描述
I have following code where I am trying to load values into a dropdown from an array(from file page students.js): 
我有以下代码尝试在其中将值从数组（从文件页面students.js）加载到下拉列表中：
student.js student.js
var STU_NAME = 0;
var STU_ID = 1;
var STU_AGE = 2;
var STUDENTS = [
["Apple", 1, 15],
["Billy", 2, 16]
["Cathy", 3, 14]
];
Functions.js Functions.js
var jQ = $.noConflict();
function populateStudents() {
jQ('#students').empty();
jQ('#students').append(jQ("<option></option>").attr("value", "").text("-- Please Select --"));
for (var _i = 0; _i < students.length; _i++) {
jQ('#students').append(jQ("<option></option>").attr("value", _i).text(STUDENTS[_i][STU_NAME]));
}
}
jQ(document).ready(function () {
populateStudents();
});
mypage.aspx mypage.aspx
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<style type="text/css">
</style>
</head>
<body>
<div id="model">
<form>
<div>
<div id="StudentLabel">
Student:
</div>
<select id="students" name="students">
</select>
</div>
<script src="../Scripts/Functions.js" type="text/javascript"></script>
<script src="../Scripts/student.js" type="text/javascript"></script>
</form>
</div>
</body>
</html>
I get an error "Microsoft JScript runtime error: '$' is undefined" at line 1 of Functions.js 我在Functions.js的第1行收到错误“ Microsoft JScript运行时错误：'$'未定义”
Can anyone help me on what I would be missing to make it working here. 任何人都可以帮助我解决在这里无法正常使用的问题。
2 个解决方案
解决方案1
2 2012-10-19 11:54:04
You have forgotten to add the jquery library 您忘记添加jQuery库
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js" type="text/javascript"></script>
<script src="../Scripts/Functions.js" type="text/javascript"></script>
<script src="../Scripts/student.js" type="text/javascript"></script>
It is highly recommended to use CDN version of jquery to improve pagespeed, check this link 强烈建议使用CDN版本的jquery来提高页面速度， 请检查此链接
解决方案2
1 已采纳 2012-10-19 11:50:37
You need to include jquery library , you can download from here Add the script tag in head of page or before you use jquery. You need to include jquery library ，您可以从此处下载在页面顶部或使用jquery之前添加script标签。
<head runat="server">
<title></title>
<style type="text/css">
</style>
<script language="javascript" type="text/javascript" src="JS/jquery-1.7.2.js"></script>
<script src="../Scripts/Functions.js" type="text/javascript"></script>
<script src="../Scripts/student.js" type="text/javascript"></script>
</head>
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