Call Parameterized asmx Web Service using JQuery

Question

I am trying to call a webservice on my local host which expects a parameter pkId and return the result. WebService runs perfect but when i call from JQuery, it does not return any data. I have tried almost all combinations to set parameter for the Web service (data) part but unable to get any result and the real pain is i don't get any error.

    $.ajax({
        type: "POST",
        url: "http://localhost/WSTest/Service.asmx/AuthorGetById",
        data: "{pkId :'" + pkId + "'}",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (msg) {
            return msg.d;
        }
    });

Answer 1

This is not an answer but means to help you reach there.

---

Even if you have an error you wont get it since you have not handled error at all.
Also worth while to check if your msg has 'd' since its a ASP.NET 3.5+ feature.
Also, dont return msg.d try to alert it.

A sample will be

$.ajax({
    type: "POST",
    url: "http://localhost/WSTest/Service.asmx/AuthorGetById",
    data: "{pkId :'" + pkId + "'}",
    contentType: "application/json; charset=utf-8",
    dataType: "json",
     success: function (msg) {
         var datum = msg.hasOwnProperty("d")? msg.d : msg;
         alert("Success" + datum);
        }
    error:function (xhr, ajaxOptions, thrownError){
        alert("Error");
    }
});

Answer 2

Success is invoked as a callback from AJAX. It means that its result is returned to the AJAX jQuery function, not as a return from your function making the AJAX call. You would need to pass result.d off to another function that makes use of it. Have you placed a breakpoint inside your success function to see what value result holds?

For information on consuming web services using AJAX calls, check out:

using jquery to consume aspnet json web services/

Answer 3

I found the answer. Actullay i was passing the parameters correctly and noticing the response in firebug but was unable to catch it on success because... my web service method return void. I changed it to return string and boooom it work fine.