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POASP.net MVC returning JSONP
 

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    <p>I am looking to return some JSON across domains and I understand that the way to do this is through JSONP rather than pure JSON. I am using ASP.net MVC so I was thinking about just extending the JSONResult type and then extendig Controller so that it also implemented a Jsonp method. Is this the best way to go about it or is there a built in ActionResult which might be better?</p> <p>Edit: I went ahead and did that. Just for reference sake I added a new result:</p> <pre><code>public class JsonpResult : System.Web.Mvc.JsonResult { public override void ExecuteResult(ControllerContext context) { if (context == null) { throw new ArgumentNullException("context"); } HttpResponseBase response = context.HttpContext.Response; if (!String.IsNullOrEmpty(ContentType)) { response.ContentType = ContentType; } else { response.ContentType = "application/javascript"; } if (ContentEncoding != null) { response.ContentEncoding = ContentEncoding; } if (Data != null) { // The JavaScriptSerializer type was marked as obsolete prior to .NET Framework 3.5 SP1 #pragma warning disable 0618 HttpRequestBase request = context.HttpContext.Request; JavaScriptSerializer serializer = new JavaScriptSerializer(); response.Write(request.Params["jsoncallback"] + "(" + serializer.Serialize(Data) + ")"); #pragma warning restore 0618 } } } </code></pre> <p>and also a couple of methods to a superclass of all my controllers:</p> <pre><code>protected internal JsonpResult Jsonp(object data) { return Jsonp(data, null /* contentType */); } protected internal JsonpResult Jsonp(object data, string contentType) { return Jsonp(data, contentType, null); } protected internal virtual JsonpResult Jsonp(object data, string contentType, Encoding contentEncoding) { return new JsonpResult { Data = data, ContentType = contentType, ContentEncoding = contentEncoding }; } </code></pre> <p>Works like a charm. </p>
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      1. USRay Lu
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    1. COThanks! Just implemented this in our project! :)
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      1. USAdam Kahtava
    2. CONice! But JSONP should be served as application/javascript http://stackoverflow.com/questions/111302/best-content-type-to-serve-jsonp
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      1. POASP.net MVC returning JSONP
      1. USMauricio Scheffer
    3. COsee also http://support.github.com/discussions/api/18-content-type-should-applicationjavascript-for-jsonp-request http://stackapps.com/questions/1668/wrong-content-type-in-jsonp-calls
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      1. USMauricio Scheffer
 

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