introduction to web design and application...

Partnership with Enterprises Towards Building Open

Source Communities and

Rejuvenation Technical Education and Innovation

Introduction

to

Web Design and

Application Development

1 A. Al-Tamimi © Lecture 15

Lecture Overview

• Static vs. Dynamic Web Content

• Server Pages Technologies

• ASP.NET Page Lifecycle

• Response and Request Objects

Lecture 15 2 A. Al-Tamimi ©

Static web Content


Dynamic web Content


Server Pages Technologies

• Despite the essential similarity, we can categorize

dynamic technology into three broad types:

• Direct output

• Page scripting

• Hybrid


Direct output: Java Servlet Code


Page Scripting: PHP/ASP


Client-based event system


ASP.NET event system


Postback

• In ASP.NET, postback is the process by which the

browser posts information back to itself

– only server controls postback information to the server

• There are two different event types in ASP.NET: page events and control events

• When a page request is sent to the server, a specific series

of page events is always triggered in a specific order

• Control events are associated with particular

controls and are fired in certain circumstances


Postback flow


Page Lifecycle


Request object

• The Request property of the Page class returns

an HttpRequest object

• This HttpRequest represents the HTTP values

sent by the browser with its request

• It contains members for retrieving query string

or form parameters, cookie data, as well as

information about the requesting browser


Response Object

• Analogous to the just-covered Request property,

the Response property of the Page class returns

an HttpResponse object

• The HttpResponse class represents the server’s

HTTP response to the current request


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