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copied!<p>You can't, to my knowledge call a function on an ASP.NET Webforms page in such a manner. And forgive me, I am making the assumption that this is a Webforms application. If this were an ASP.NET MVC application in which the Calender.aspx [sic] page is a View for the CalenderController you could do something like:</p> <pre><code>public JsonResult GetCDCatalog() { // your logic return Json(CDs.ToList<CD>()); } </code></pre> <p>More info: <a href="http://geekswithblogs.net/michelotti/archive/2008/06/28/mvc-json---jsonresult-and-jquery.aspx" rel="nofollow noreferrer">http://geekswithblogs.net/michelotti/archive/2008/06/28/mvc-json---jsonresult-and-jquery.aspx</a></p> <p>Also, would it be possible to make the GetCDCatalog() method into a web service method? It looks like that's where you might be headed.</p> <p>EDIT: Ok, so I made a little proof of concept that hopefully you'll be able to adapt to your project/solution.</p> <p>I created an ASP.NET Webforms (Visual Studio 2010/Webforms 4) application with the following method on the Default.aspx page:</p> <pre><code> [WebMethod] public static string[] GetSomeThings(int numberOfThings) { List<string> strings = new List<string>(); for (int i = 0; i < numberOfThings; ++i) strings.Add(i.ToString()); return strings.ToArray<string>(); } </code></pre> <p>On the Default.aspx page of my application, I added the following jQuery:</p> <p>(NOTE: You're probably looking to call your Calender.aspx page from a different page, but as long as it is not cross-domain, it should be fine. Otherwise, you'll need to use JSONP and add a callback=? to the end of the URL to which you're POSTing).</p> <pre><code> function GetSomeThingsUsingJSON() { $.ajax({ url: 'default.aspx/GetSomeThings', type: 'POST', contentType: 'application/json; charset=utf-8', dataType: 'json', data: '{ "numberOfThings": 2 }', success: OnSuccess, error: OnError }); } function OnSuccess(data, textStatus, XMLHttpRequest) { $("span#json").text("The length of the array returned is " + data.d.length); } function OnError(XMLHttpRequest, textStatus, errorThrown) { $("span#json").text("An error occurred - " + textStatus); } </code></pre> <p>Then, I just called GetSomeThingsUsingJSON() on the page load (document.ready). It returns the following JSON:</p> <pre><code>{"d":["0","1"]} </code></pre> <p>I believe the "d" is a .NET convention/annoyance. Regardless, to access the data you want in your OnSuccess method, you'll need to reference the d property for the array you're looking for as I do to get the length of the array returned.</p>

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