WCF Json Service Method Argument null Problem

Do NOT use "url" as a argument name.

Wcf Service Method

 [OperationContract]
 [WebInvoke(Method = "POST", BodyStyle = WebMessageBodyStyle.WrappedRequest, ResponseFormat = WebMessageFormat.Json,
         RequestFormat= WebMessageFormat.Json)]
PageDTO PageByUrl(String url,String language);  --> PageDTO PageByUrl(String title,String language); 


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Requested Url:

http://localhost:2222/tr-TR/test-page-1
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Jquery Ajax Call

<script type="text/javascript">

    $(document).ready(function () {
     
        data = window.location.pathname.split("/");
        urlStr = data[data.length -1];
        languateStr = data[data.length - 2];

        var data = new Object();
        data.url = urlStr;   ---> data.title=urlStr;
        data.language = languateStr;

        //var xxx = $.toJSON(data);
        //result: {"url":" test-page-1","language":"tr-TR"}

        caller_dynamic(data);

    });

    var menuUrl = "http://localhost:9000/PublicService.svc/PageByUrl";

    function caller_dynamic(mydata) {

        $.support.cors = true;

        $.ajax({

            type: "POST",

            url: menuUrl,

            contentType: "application/json; charset=utf-8",

            dataType: "json",

            data: $.toJSON(mydata),

            success: function (data) {

                $("#content").html(data.Content);

            },

            error: function (xhr) {

                alert(xhr.responseText);

            }

        });

    }

     < /script>

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public PageDTO PageByUrl(String url, String language) --> (String title, String language)

        {

            try

            {

                var publicBS = unityContainer.Resolve();

                var page = publicBS.PageByUrl(title);

                return page;

            }

            catch (Exception ex)

            {

                throw DynFaultException.Instance.CreateFault(ex);

            }

        }

Conclusion

if url is null, do NOT panic. just change the name of the argument name url to title.