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POHow to return JSON from a 2.0 asmx web service
 

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    <p>I am using .Net framework 2.0 / jQuery to make an Ajax call to a 2.0 web service. No matter what I set the contentType to in the ajax call, the service always returns XML. I want it to return Json!</p> <p>Here is the call:</p> <pre><code> $(document).ready(function() { $.ajax({ type: "POST", url: "DonationsService.asmx/GetDate", data: "{}", contentType: "application/json; charset=utf-8", dataType: "json", success: function(msg) { // Hide the fake progress indicator graphic. $('#RSSContent').removeClass('loading'); // Insert the returned HTML into the &lt;div&gt;. $('#RSSContent').html(msg.d); } }); }); </code></pre> <p>Here is what the request header looks like in Fiddler:</p> <pre><code>POST /DonationsService.asmx/GetDate HTTP/1.1 x-requested-with: XMLHttpRequest Accept-Language: en-us Referer: http://localhost:1238/text.htm Accept: application/json, text/javascript, */* Content-Type: application/json; charset=utf-8 Accept-Encoding: gzip, deflate User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; eMusic DLM/4; .NET CLR 2.0.50727) Host: localhost:1238 Content-Length: 2 Connection: Keep-Alive Pragma: no-cache </code></pre> <p>I have tried setting the contentType to 'text/json' and get the same results.</p> <p>Here is the web service method:</p> <pre><code>&lt;WebMethod()&gt; _ Public Function GetDate() As String 'just playing around with Newtonsoft.Json Dim sb As New StringBuilder Dim sw As New IO.StringWriter(sb) Dim strOut As String = String.Empty Using jw As New JsonTextWriter(sw) With jw .WriteStartObject() .WritePropertyName("DateTime") .WriteValue(DateTime.Now.ToString) .WriteEndObject() End With strOut = sw.ToString End Using Return strOut End Function </code></pre> <p>and here is what it returns:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;string xmlns="http://DMS.Webservices.org/"&gt;{"DateTime":"11/13/2008 6:04:22 PM"}&lt;/string&gt; </code></pre> <p>Does anyone know how to force the web service to return Json when I ask for Json?</p> <p>Please don't tell me to upgrade to .Net Framework 3.5 or anything like that (I'm not that stupid). I need a 2.0 solution.</p>
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