如何使用jQuery/JSON/AJAX将字符串传递给asp.net web服务

As it is now I create a JavaScript object and then stringify it, put it in a hidden textbox and my code behind can read this string. I then use JSON.NET to parse the string which works fine. I now try to use ajax to post it to my web service but have some issues with how to send the string. I have tried many ways but gets the common errors like As it is now I create a JavaScript object and t