ASP.NET WebMethod Returns JSON wrapped in quotes

Question

I have an asp.net page with a WebMethod on it to pass JSON back to my javascript.

Bellow is the web method:

[WebMethod]
public static string getData         


        

Answer 1

I had a similar issue with my code. I was trying to return an XmlDocument as JSON to a calling script but returning XmlDocument from the WebService returned an empty set of arrays (as XmlDocument is NOT serializable!).

If i set the ScriptService with the attribute ResponseFormat.JSON then my JSON was double-escaped.

The way to out-fox ASP.NET is to tell ASP.NET that you're returning XML and then it won't double-escape your JSON ;-)

    [WebMethod(EnableSession = true)]
    [ScriptMethod(ResponseFormat = ResponseFormat.Xml)]
    public String MyJSONWebService(String sParam1, String sParam2, String sParam3)
    {
       ... do stuff.....
       XmlDocument oXMLDocument = new XmlDocument();
       oXMLDocument.LoadXml(sXML);
       sJSON = JsonConvert.SerializeXmlNode(oXMLDocument.SelectSingleNode("autnresponse"));
       return sJSON;
    }

I know it's a hack but .....