I have tried for hours to get this working, and I am really hoping one of you knows (a heck of a lot) more about this than I. When the client keys up in a textbox, I would l
Ensure "url" is in the format page.aspx/updateOrder.
Specify datatype: json
datatype: json
Ensure your updateOrderJS() is being called.
updateOrderJS()
Ensure contentType: "application/json; charset=utf-8" is included.
contentType: "application/json; charset=utf-8"
Note: [WebMethod] is used for calling webforms methods, not MVC.
[WebMethod]