SoapFault - faultcode: 'soap:Server' faultstring: 'Server was unable to process request.Object reference not set to an instance of an object

Question

I have a webservice programmed in asp.net . I want to reach webservice from android application using SOAP(ksoap2) .

Here is my soap segment,

//Namespace of the Webservice - can be found in WSDL
private static String NAMESPACE = "http://tempuri.org/";
//Webservice URL - WSDL File location
private static String URL = "http://locationbasedapp.net/Service1.asmx";//Make sure you changed IP address
//SOAP Action URI again Namespace + Web method name
private static String SOAP_ACTION = "http://tempuri.org/";

public static String invokeListLocationsWS(String datetext, String webMethName) {
    String xmlDataSet = "";
    // Create request
    SoapObject request = new SoapObject(NAMESPACE, webMethName);
    // Property which holds input parameters
    PropertyInfo datetextPI = new PropertyInfo();
    PropertyInfo passPI = new PropertyInfo();
    // Set Username
    datetextPI.setName("datetext");
    // Set Value
    datetextPI.setValue(datetext);
    // Set dataType
    datetextPI.setType(String.class);
    // Add the property to request object
    request.addProperty(datetextPI);

    // Create envelope
    SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
            SoapEnvelope.VER11);
    envelope.dotNet = true;
    // Set output SOAP object
    envelope.setOutputSoapObject(request);
    // Create HTTP call object
    HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);

    try {
        // Invoke web service
        androidHttpTransport.call(SOAP_ACTION+webMethName, envelope);
        // Get the response
        SoapPrimitive response = (SoapPrimitive)envelope.getResponse();
        // Assign it to  boolean variable variable

        xmlDataSet =response.toString();

    } catch (Exception e) {
        //Assign Error Status true in static variable 'errored'
        MapActivity.errored = true;
        e.printStackTrace();
    }
    //Return booleam to calling object
    return xmlDataSet;
}

While I am debugging the code , I have an error as mentioned on the question title. The error is seen on the

SoapPrimitive response = (SoapPrimitive)envelope.getResponse();

line..

I think I can't get response from webservice. How Can I fix it ?

Webservice returns xml.InnerText. It's type String.

Please answer me.

Answer 1

While I'm not an .NET developer I've seen similar error codes before using Java and it always boils down to the XML being returned by the calling web service being invalid.

In my case what I tried was capturing the raw XML response and then attempting to parse it using a XML parsing library.