Page Life Cycle and Asynchronous Par tial Page Rendering Mục tiêu chính của điều này và các chương tiếp theo là để giúp bạn có được một sự hiểu biết vững chắc của các postback AJAX trang không đồng bộ hoặc một phần trang dựng hình yêu cầu xử lý cơ sở hạ tầng. Cơ sở hạ tầng này bao gồm hai nhóm của các thành phần: Phía máy chủ thành phần: Nhóm này bao gồm các UpdatePanel, ScriptManager, PageRequestManager, và các lớp học ScriptRegistrationManager. Client-side thành phần: Nhóm này bao gồm PageRequestManager, WebRequest, WebRequestExecutor, WebRequestManager, XMLHttpExecutor, và các lớp. | Page Life Cycle and Asynchronous Partial Page Rendering The main goal of this and the next few chapters is to help you gain a solid understanding of the AJAX asynchronous page postback or partial-page-rendering-request-processing infrastructure. This infrastructure consists of two groups of components Server-side components This group includes the ScriptManager UpdatePanel PageRequestManager and ScriptRegistrationManager classes. Client-side components This group includes the PageRequestManager WebRequest WebRequestExecutor WebRequestManager XMLHttpExecutor and Application classes among others. Note that both the server and client sides contain a component named PageRequestManager. Even though they have the same name they are two different components defined in two different frameworks. One is defined in the AJAX server-side framework while the other is defined in the AJAX client-side framework. For ease of reference I ll refer to the one defined in the server-side framework as the server-side PageRequestManager and the other as the client-side PageRequestManager. These components are at the heart of AJAX partial page rendering which as you ll see later is the result of the communications between the clientside and server-side PageRequestManager components. As their names suggest they re the ones that are responsible for managing and processing asynchronous partial-page-rendering requests. Here is how these two components work together. The current client-side PageRequestManager instance makes an asynchronous page postback request to the server. The current server-side PageRequestManager instance picks up and processes the request and sends the reponse text back to the client. The current client-side PageRequestManager instance then picks up and processes the response text and updates the regions of the page enclosed within the specified UpdatePanel server controls. Chapter 21 Page Life Cycle and Asynchronous Partial Page Rendering .
