I have peculiar problem trying to consume a simple WCF service from jquery. See the code below:
$(document).ready(function () {
    // Initialize the carousel on the header part of the page
    $("#myCarousel").carousel({
        interval: 2000
    });
// The handler for the submit button (login form)
$("#submit").click(function () {
    var sendData = '{"username": "' + 
                     $("#usernameTB").val() + 
                   '", "password": "' + 
                     CryptoJS.MD5($("#passwordTB").val()) + 
                   '"}';
    $.ajax("Services/LoginUser.svc/Login", {
        cache: false,
        type: "POST",
        data: sendData,
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        processData: true,
        complete: ServiceCompleted
    });
});
}); function ServiceCompleted(data) { alert("Response: " + data.responseText); }
When I use this code from IE, it works like a charm, that is, the call is executed and returns what I expect, see the below fiddler dumps of the request / response:
POST http://localhost/CanDoIT/Services/LoginUser.svc/Login HTTP/1.1
Accept: application/json, text/javascript, */*; q=0.01
Content-Type: application/json; charset=utf-8
X-Requested-With: XMLHttpRequest
Referer: http://localhost/CanDoIT/default.htm
Accept-Language: nl-NL,en-US;q=0.5
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: localhost
Content-Length: 64
Connection: Keep-Alive
Pragma: no-cache
{"username": "", "password": "d41d8cd98f00b204e9800998ecf8427e"}
HTTP/1.1 200 OK
Cache-Control: private
Content-Length: 10
Content-Type: application/json; charset=utf-8
Server: Microsoft-IIS/7.5
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Mon, 29 Oct 2012 09:31:15 GMT
{"d":null}
If I do the same using Chrome, I get the following request / response dumps:
POST http://localhost/CanDoIT/Services/LoginUser.svc/Login HTTP/1.1
Host: localhost
Connection: keep-alive
Content-Length: 64
Origin: http://localhost
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4
Content-Type: application/json; charset=UTF-8
Accept: application/json, text/javascript, */*; q=0.01
Referer: http://localhost/CanDoIT/default.htm?
Accept-Encoding: gzip,deflate,sdch
Accept-Language: nl-NL,nl;q=0.8,en-US;q=0.6,en;q=0.4
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
{"username": "", "password": "d41d8cd98f00b204e9800998ecf8427e"}
HTTP/1.1 200 OK
Cache-Control: private
Content-Length: 10
Content-Type: application/json; charset=utf-8
Server: Microsoft-IIS/7.5
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Mon, 29 Oct 2012 09:30:27 GMT
{"d":null}
Now, the alert does not show me the {"d":null} text.
Does anyone know what the difference is that is blocking me from using the responseText?
