Error with passing json constructed data and receiving xmldocument as output

Question

I have the following ajax call to webservice to pass json data and get response xml data, when i debug the code the flow is not reaching the webservice

var keyword2 = "{\"keyword1\":\"" + keyword1 + "\",\"streetname\":\"" + address1 + "\",\"lat\":\"" + lat + "\",\"lng\":\"" + lng + "\",\"radius\":\"" + radius + "\"}";
                    $.ajax({
                        type: "POST",
                        async: false,
                        url: "/blockseek3-9-2010/JsonWebService.asmx/GetList",
                        data: keyword2,
                        contentType: "application/json; charset=utf-8",
                        dataType: "json",
                        failure: ajaxCallFailed,
                        success: function(response) {
                            GDownloadUrl(response, function(data) {
                                var xml = GXml.parse(response.xml);
                                var markers = xml.documentElement.getElementsByTagName('marker');
                                map.clearOverlays();

                            var sidebar = document.getElementById('sidebar');
                            sidebar.innerHTML = '';
                            alert(markers.length);

                            if (markers.length == 0) {
                                sidebar.innerHTML = 'No results found.';
                                map.setCenter(new GLatLng(40, -100), 4);
                                return;
                            }

                            var bounds = new GLatLngBounds();
                            for (var i = 0; i < markers.length; i++) {
                                var name = markers[i].getAttribute('name');
                                var address = markers[i].getAttribute('address');
                                var distance = parseFloat(markers[i].getAttribute('distance'));
                                var point = new GLatLng(parseFloat(markers[i]
                    .getAttribute('lat')), parseFloat(markers[i]
                    .getAttribute('lng')));
                                var imagepath = markers[i].getAttribute('imagepath');

                                var marker = createMarker(point, name, address, imagepath);
                                map.addOverlay(marker);
                                var sidebarEntry = createSidebarEntry(marker, name, address,
                    distance, imagepath);
                                sidebar.appendChild(sidebarEntry);


                                bounds.extend(point);
                            }
                            map.setCenter(bounds.getCenter(), map.getBoundsZoomLevel(bounds));
                        });

                    }

                });
            });

This will be my code snippet on webservice side

[WebMethod]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    public XmlDocument GetList(string keyword1, string streetname, string lat, string lng, string radius)
    {

  XmlDocument xmlDoc=  CreateXML( keyword1,streetname,lat,lng,radius);
    //save file to application folder which will be refferd by client application
  xmlDoc.Save(@"D:\blockseek3-9-2010\Block3.xml");
  return xmlDoc;

}

Answer 1

Two things.

1. Are you sure that the URL /blockseek3-9-2010/JsonWebService.asmx/GetList is correct, this is relative to the page that the Ajax call is being made from. What is the full URL to the page running this query?

2. Your WebMethod has specified a Json response format [ScriptMethod(ResponseFormat = ResponseFormat.Json)] but in the Javascript code you are accessing response.xml which will be undefined for a Json object. By your description, I think you need to change the WebMthod to [ScriptMethod(ResponseFormat = ResponseFormat.Xml)], you can still use Json to invoke the WebMethod from the client side.

Note: Point 2 is not related to why you can't call the web service, this point relates to an issue you will face once you resolve the core issue of not actually hitting the WebMethod.