Sending string to wcf service using jquery ajax. why can i only send strings of numbers?

For some reason, I'm only able to pass strings containing numbers to my web service when using jquery ajax. This hasn't been an issue so far because I was always just passing IDs to my wcf service. But I'm trying to do something more complex now but I can't figure it out.

In my interface:

    [OperationContract]
    [WebInvoke(ResponseFormat = WebMessageFormat.Json)]
    DataTableOutput GetDataTableOutput(string json);

My webservice:

public DataTableOutput GetDataTableOutput(string json)
{
    DataTableOutput x = new DataTableOutput();

    x.iTotalDisplayRecords = 9;
    x.iTotalRecords = 50;
    x.sColumns = "1";
    x.sEcho = "1";
    x.aaData = null;



    return x;
}

Javascript/Jquery:

var x = "1";
                    $.ajax({
                        type: "POST",
                        async: false,
                        url: "Services/Service1.svc/GetDataTableOutput",
                        contentType: "application/json; charset=utf-8",
                        data: x,
                        dataType: "json",
                        success: function (msg) {
                        },
                        error: function (XMLHttpRequest, textStatus, errorThrown) {
                            //alert(XMLHttpRequest.status);
                            //alert(XMLHttpRequest.responseText);
                        }
                    });

The above code WORKS perfectly. But when I change x to "t" or even to "{'test':'test'}" I get a Error 400 Bad Request error in Firebug.

Thanks, John

EDIT: Making some progress! data: JSON.stringify("{'test':'test'}"), Sends the string to my function!

EDIT2:

var jsonAOData = JSON.stringify(aoData);
                    $.ajax({
                        type: "POST",
                        async: false,
                        url: sSource,
                        contentType: "application/json; charset=utf-8",
                        data: "{'Input':" + jsonAOData + "}",
                        dataType: "json",
                        success: function (msg) {
                        },
                        error: function (XMLHttpRequest, textStatus, errorThrown) {
                            //alert(XMLHttpRequest.status);
                            //alert(XMLHttpRequest.responseText);
                        }
                    });

EDIT3: I modified the code block I put in EDIT2 up above.

Swapping the " and ' did the trick!

$.ajax({
                        type: "POST",
                        async: false,
                        url: sSource,
                        contentType: "application/json; charset=utf-8",
                        data: '{"Input":' + jsonAOData + '}',
                        dataType: "json",
                        success: function (msg) {
                        },
                        error: function (XMLHttpRequest, textStatus, errorThrown) {
                            //alert(XMLHttpRequest.status);
                            //alert(XMLHttpRequest.responseText);
                        }
      开发者_高级运维              });

However, I have a new problem:

    public DataTableOutput GetDataTableOutput(DataTableInputOverview Input)
    {

The input here is completely null. The values I passed from jsonAOData didn't get assigned to the DataTableInputOverview Input variable. :(

I modified the code block I put in EDIT2 up above.

Swapping the " and ' did the trick!

$.ajax({
                        type: "POST",
                        async: false,
                        url: sSource,
                        contentType: "application/json; charset=utf-8",
                        data: '{"Input":' + jsonAOData + '}',
                        dataType: "json",
                        success: function (msg) {
                        },
                        error: function (XMLHttpRequest, textStatus, errorThrown) {
                            //alert(XMLHttpRequest.status);
                            //alert(XMLHttpRequest.responseText);
                        }
                    });

This actually worked but I had to fix the format of the object I was sending to GetDataTableOutputOverview