JsonResult 操作未被触发
我的 UpdatesController 中有一个带有以下签名的操作方法：
public JsonResult GetUpdates(DateTime lastUpdate)
在我看来，我有以下代码来调用该方法（此时它只是在按钮的 onclick 事件上进行测试，具有 id clickme 的按钮）：
$(document).ready(function(){
$("#clickme").click(function(){
alert("Before");
$.getJSON("http://localhost/Updates/GetUpdates", "04/05/2011 11:44:37", function(data){ alert(data); });
alert("After");
});
});
点击事件触发，并且 Before 和 After 警报都触发，但是我没有收到任何数据，因为我没有收到 json 警报数据。我还在 GetUpdates 方法中设置了一个断点，并且从未命中该断点，我认为这表明请求未发送？
会不会是参数有问题？
谢谢
更新
所以我终于在 Visual Studio 中单步执行了，并且操作方法运行没有错误。但是，警报未显示，如果我查看 Firebug 中的“网络”选项卡，我会收到针对此特定请求的 500 错误？
I have an action method in my UpdatesController with the following signature:
public JsonResult GetUpdates(DateTime lastUpdate)
In my view, I have the following code to call the method (at this moment in time it's just on a button's onclick event for testing, the button having id clickme):
$(document).ready(function(){
$("#clickme").click(function(){
alert("Before");
$.getJSON("http://localhost/Updates/GetUpdates", "04/05/2011 11:44:37", function(data){ alert(data); });
alert("After");
});
});
The click event fires, and the Before and After alert's both fire, however I don't get any data back as I get no alert with json data. I have also set a breakpoint in the GetUpdates method and the breakpoint is never hit, which I believe indicates that the request isn't getting sent?
Could there be some issue with the parameter?
Thanks
Update
So I finally got it to step through in Visual Studio and the action method runs with no errors. However, the alert isn't shown and if I look at the Net tab in Firebug I get a 500 error for this specific request?
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尝试更改它来执行此操作：
可能没有找到正确的操作，因为可能没有匹配的路线。
运行 fiddler 并检查响应是什么将是我要尝试的下一步
编辑：
还要确保如果您使用的是 MVC 2，您的 Json 调用将 JsonRequestBehavior.AllowGet 作为参数。例如
Try changing it to do this:
It's possible it's not finding the correct action as there may not be a matching route.
Running fiddler and checking what the response is would be the next step I would try
Edit:
Also make sure that your Json call has JsonRequestBehavior.AllowGet as a parameter if you're using MVC 2. e.g.