asp.net - Can not get proper value in javascript from web service -

here problem: have web service method returns simple string:

namespace webstockservice {     [webservice(namespace = "http://tempuri.org/")]     [webservicebinding(conformsto = wsiprofiles.basicprofile1_1)]     // allow web service called script,      // using asp.net ajax, uncomment following line.      [system.web.script.services.scriptservice]     public class stockservice : system.web.services.webservice     {         [webmethod]         public string getchallenge()         {             //some codes             return string;         }     } 

i want call service in javascript:

try {    var challenge = webstockservice.stockservice.getchallenge(); } catch(e) {    alert(e.messsage); } 

i have not got error message in call, when debug script challenge undefined!!!

i have tested web service method in asmx fashion , invokes , returns string.

i have inserted scriptmanager tag in html:

<asp:scriptmanager id="webstockservice" runat="server">             <services>                 <asp:servicereference path="stockservice.asmx" />                            </services> </asp:scriptmanager>  

any appreciated.

this line must changed

var challenge = webstockservice.stockservice.getchallenge();

please try following

webstockservice.stockservice.getchallenge(successcallback);  function successcallback(returnedstring) {   alert(returnedstring); } 

you must pass callback javascript function execute. call webservice asynchronous in nature , won't intended behavior tried in code. reading ajax give better idea. detailed answer here