如果没有收到JSONP回调 [英] Not receiving JSONP callback
问题描述
我下面的ASP.NET MVC和JSONP博客文章示例code /教程：的 http://blogorama.nerdworks.in/entry-EnablingJSONPcallsonASPNETMVC.aspx
I am following the sample code/tutorial for ASP.NET MVC and JSONP blog post: http://blogorama.nerdworks.in/entry-EnablingJSONPcallsonASPNETMVC.aspx
我已经采取了code样品，并已修改为我自己的消费。
I have taken the code sample and have modified it for my own consumption.
当我打的页面，它激发了我的控制器的动作，但 $。的getJSON（调用函数（RSP）.. 不点火的。
When I hit the page, it fires off my controller's action but the $.getJSON(call, function (rsp).. is not firing at all.
控制器动作
[JsonpFilter]
public JsonpResult GetMyObjects(int id)
{
List<MyObject> list = MyDAO.GetMyObjects(id);
return new JsonpResult
{
Data = list,
JsonRequestBehavior = JsonRequestBehavior.AllowGet
};
}
HTML页
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
</head>
<body>
<script type="text/javascript">
var url = "http://localhost/MySite.ContentDelivery/MyController/GetMyObjects/?";
function getObjects() {
//
// build the URL
//
debugger;
var call = url + "id=48&jsoncallback=?";
//
// make the ajax call
//
$.getJSON(call, function (rsp) {
debugger;
alert(rsp);
if (rsp.stat != "ok") {
//
// something went wrong!
//
$("#myDiv").append(
"<label style=\"background-color:red;color:white;padding: 25px;\">Whoops! It didn't work!" +
" This is embarrassing! Here's what the system had to " +
" say about this - " + rsp.message + "</label>");
}
else {
//
// build the html
//
var html = "";
$.each(rsp.list.myObject, function () {
var obj = this;
html += "<span" + obj.Name + "</span> <br />";
});
//
// append this to the div
//
$("#myDiv").append(html);
}
});
}
//
// get the offers
//
$(document).ready(function() {
alert('go..');
$(getOobjects);
});
</script>
<div id="myDiv"></div>
</body>
</html>
TL;博士为什么我的的getJSON（）不点火，而我的 getObjects（）火灾和执行MVC控制器动作。
tl;dr why is my getJson() not firing while my getObjects() fires and executes the MVC controller action.
推荐答案
替换为：
var call = url + "id=48&jsoncallback=?";
与
var call = url + "id=48&callback=?";
自定义的Json presult 您使用的是依赖于一个名为回调，而不是一个查询字符串参数 jsoncallback ：
The custom JsonpResult you are using relies on a query string parameter called callback and not jsoncallback:
Callback = context.HttpContext.Request.QueryString["callback"];
另外你装饰了 [JsonpFilter] 属性您的控制器动作，返回一个的Json presult 。正如在文章中解释，你一定看过你应该选择一个：
Also you have decorated your controller action with a [JsonpFilter] attribute and returning a JsonpResult. As explained in the article you must have read you should choose one:
[JsonpFilter]
public ActionResult GetMyObjects(int id)
{
List<MyObject> list = MyDAO.GetMyObjects(id);
return Json(list, JsonRequestBehavior.AllowGet);
}
或其他
public ActionResult GetMyObjects(int id)
{
List<MyObject> list = MyDAO.GetMyObjects(id);
return new JsonpResult
{
Data = list,
JsonRequestBehavior = JsonRequestBehavior.AllowGet
};
}
但不要混用两种。
but do not mix the two.
这篇关于如果没有收到JSONP回调的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
