Delve into the fundamental architectural principles and techniques for developing service-oriented AJAX applications for the enterprise. This guide offers a code-heavy, example-based approach to learning how to write a modern services API and an AJAX

WEB应用程序无状态，无法主动更新客户端的显示。需要一种定时更新机制，来保持与服务器的同步。 可以使用ASP.NET Ajax中的Timer控件来实现-WEB application stateless, unable to take the initiative to update the client' s display. Need for a regular update mechanism to maintain synchronization with the server