我有一个简单的jquery点击事件
<script type="text/javascript">
$(function() {
$('#post').click(function() {
alert("test");
});
});
</script>
以及在site.master中定义的jquery引用
<script src="<%=ResolveUrl("~/Scripts/jquery-1.3.2.js")%>" type="text/javascript"></script>
我已经检查了脚本被正确解析，我能够看到标记，并直接在firebug中查看脚本，所以我必须被发现。然而，我仍然得到:
$没有定义
jquery没有一个是有效的。我还尝试了它的各种变体，比如$(document)。ready和jQuery等。
这是一个。net 3.5上的MVC 2应用程序，我确信我真的很密集，谷歌上的所有地方都说要检查文件是否被正确引用，我已经检查了一遍又一遍，请建议!: /
当前回答
I had this problem once for no apparent reason. It was happenning locally whilst I was running through the aspnet development server. It had been working and I reverted everything to a state where it had previously been working and still it didn't work. I looked in the chrome debugger and the jquery-1.7.1.min.js had loaded without any problems. It was all very confusing. I still don't know what the problem was but closing the browser, closing the development server and then trying again sorted it out.
其他回答
是否使用其他JavaScript库?如果是这样，你可能需要在兼容模式下使用jQuery:
http://docs.jquery.com/Using_jQuery_with_Other_Libraries
我也遇到过类似的问题。在我的c# MVC应用程序中，JQuery没有被识别出来。我需要移动@Scripts.Render("~/bundles/jquery")从底部的我的_Layout。CSHTML文件到section的头。另外，如果你正在使用visual studio，请确保你已经将Jquery作为Nuget包!
<head>
@Scripts.Render("~/bundles/jquery")
</head>
这个错误意味着jQuery还没有加载到页面上。使用$(document).ready(…)或其任何变体都没有好处，因为$是jQuery函数。
使用窗口。Onload应该在这里工作。注意，只有一个函数可以分配给window.onload。为了避免丢失原始的onload逻辑，你可以像这样装饰原始函数:
originalOnload = window.onload;
window.onload = function() {
if (originalOnload) {
originalOnload();
}
// YOUR JQUERY
};
这将执行最初分配给window的函数。onload，然后执行// YOUR JQUERY。
有关装饰器模式的更多详细信息，请参阅https://en.wikipedia.org/wiki/Decorator_pattern。
I had this problem once for no apparent reason. It was happenning locally whilst I was running through the aspnet development server. It had been working and I reverted everything to a state where it had previously been working and still it didn't work. I looked in the chrome debugger and the jquery-1.7.1.min.js had loaded without any problems. It was all very confusing. I still don't know what the problem was but closing the browser, closing the development server and then trying again sorted it out.
我得到了同样的错误消息，当我拼写错误的jQuery引用，而不是type="text/javascript"，我键入"…javascirpt"。；）
