android调用.net开发的webservice通过ksoap

private static final String SOAP_ACTION = "http://tempuri.org/GetBillList";
private static final String METHOD_NAME = "GetBillList";
private static final String NAMESPACE = "http://tempuri.org/";
private static final String URL = "http://192.168.0.150:8888/AndroidService.asmx";
private BillModel pe=new BillModel();
public String DjAll(String where)
{
try
{
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
request.addProperty("where",where);
//request.addProperty("password",pwd);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet=true;
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
androidHttpTransport.call(SOAP_ACTION, envelope);
Object result = (Object) envelope.getResponse();
return result.toString();
}

catch (Exception e)
{
// return false;
return null;
}
}