Asp.Net Jquery Ajax ile Post

Client Side Kodları

<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.js'></script>
<script type="text/javascript">
    function Calistir() {
        var conString = $('#txtSqlConString').val();
        var queryString = $('#txtQueryString').val();
        //alert('@Url.Action("SqlCalistir", "Home")')
        $.ajax({
            type: "POST",
            url: '@Url.Action("SqlCalistir", "Home")',
            contentType: "application/json; charset=utf-8",
            data: "{'sqlCommand':'" + queryString + "','sqlConnection':'" + conString + "'}",
            dataType: "json",
            success: function (msg) {
                alert(msg);
            },
            error: function () {
                alert('Error!');
            }
        });
    }
</script>

Server Side Kodları

[HttpPost]
       public JsonResult SqlCalistir(string sqlCommand,string sqlConnection)
       {
           string result = string.Empty;
           DataTable dt = new DataTable();
           using (OleDbConnection con = new OleDbConnection(sqlConnection))
           {
               using (OleDbCommand cmd = new OleDbCommand(sqlCommand, con))
               {
                   con.Open();
                   OleDbDataAdapter da = new OleDbDataAdapter(cmd);
                   da.Fill(dt);
                   result =DataTableToJSONWithJSONNet(dt);
                   con.Close();
               }
           }
           return Json(result, JsonRequestBehavior.AllowGet); 
       }

private string DataTableToJSONWithJSONNet(DataTable table)
       {
           string JSONString = string.Empty;
           JSONString = Newtonsoft.Json.JsonConvert.SerializeObject(table);
           return JSONString;
       }