java - JSONObject sent to .net service via HttpPost is recieving null JSONObject -

i need consume json webservice method accepts stringified jsonobject parameter,

this how making jsonobject

btnregister.setonclicklistener(new onclicklistener() {              @override             public void onclick(view v) {                 // todo auto-generated method stub                   jsonobjsend = new jsonobject();                  try{                     jsonobjsend.put("firstname", firstname.gettext().tostring());                     jsonobjsend.put("lastname", lastname.gettext().tostring());                     jsonobjsend.put("emaillid", emailid.gettext().tostring());                     jsonobjsend.put("password", password.gettext().tostring());                     jsonobjsend.put("mobilenumber", mobilenumber.gettext().tostring()); //                  jsonobjsend.put("login_rememberme", "true");    //                  jsonobject header = new jsonobject(); //                  header.put("devicetype","android"); // device type //                  header.put("deviceversion","2.0"); // device os version //                  header.put("language", "es-es");    // language of android client //                  jsonobjsend.put("header", header);                   }catch (jsonexception e) {                     e.printstacktrace();                 }                    new sendjsonobect().execute(url); } });  } 

public class sendjsonobect extends asynctask {

@override protected string doinbackground(string... params) {     // todo auto-generated method stub      string jsonobjrecv = httpclient.sendhttppost(params[0],jsonobjsend);     log.d("jsonobjsend",""+jsonobjsend);     log.d("jsonobjrecv",""+jsonobjrecv);     return jsonobjrecv.tostring();  }  @override protected void onpostexecute(string result) {     // todo auto-generated method stub     super.onpostexecute(result);     toast.maketext(registration.this, result,toast.length_long ).show();     log.d("result", ""+result); } 

}

this method making request call

public static string sendhttppost(string url, jsonobject jsondata) {          try {             defaulthttpclient httpclient = new defaulthttpclient();             httppost httppostrequest = new httppost(url);              stringentity se=null;             try {                 se = new stringentity(jsondata.tostring(),http.utf_8);              } catch (unsupportedencodingexception  e) {                 // todo auto-generated catch block                 e.printstacktrace();             }             se.setcontenttype("application/json");             se.setcontentencoding("utf-8");             // set http parameters             httppostrequest.setentity(se);              log.d("test", ""+se); //          httppostrequest.setheader("accept", "application/json"); //          httppostrequest.setheader("content-type", "application/json");              long t = system.currenttimemillis();             httpresponse response = (httpresponse) httpclient.execute(httppostrequest);             log.i(tag, "httpresponse received in [" + (system.currenttimemillis()-t) + "ms]");                 // hold of response entity (-> data):             httpentity entity = response.getentity();              if (entity != null) {                 // read content stream                 inputstream instream = entity.getcontent();                 header contentencoding = response.getfirstheader("content-encoding");                 if (contentencoding != null && contentencoding.getvalue().equalsignorecase("gzip")) {                     instream = new gzipinputstream(instream);                 }                  // convert content stream string                 string resultstring= convertstreamtostring(instream);                 instream.close();                 resultstring = resultstring.substring(1,resultstring.length()-1); // remove wrapping "[" , "]"                  // transform string jsonobject //              jsonobject jsonobjrecv = new jsonobject(resultstring); ////                 raw debug output of our received json object: //              log.i(tag,"<jsonobject>\n"+jsonobjrecv.tostring()+"\n</jsonobject>");                  return resultstring;             }           }         catch (exception e)         {             // more http exception handling in tutorial.             // print stack trace.             e.printstacktrace();         }         return null;     } 

the jsonobject received @ service side showing null.

what mistake doing?.

did try application/x-www-form-urlencoded content type.

httppostrequest.addheader("content-type", "application/x-www-form-urlencoded");