September 2003
Intermediate to advanced
1008 pages
26h 5m
English
Content preview from Programming ASP.NET, Second EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 6. Programming Web Forms
In Chapter 5, you learned many of the details about using ASP server controls in Web Forms. In this chapter, you will learn techniques to help you utilize the full power of ASP.NET in creating Web Forms, including:
Using code-behind to segregate the presentation code from the logic
Understanding the control lifecycle of a web page
Managing state in ASP.NET
Using Visual Studio .NET as a development tool
Code-Behind
In traditional ASP, the interweaving of script with HTML can produce
source control nightmares and difficult-to-maintain ASP pages.
ASP.NET addresses this problem by giving programmers the ability to
separate the executable code
from the presentation code. You write the HTML in a
page file
(with a .aspx extension),
and you write the C# or VB.NET code in
the code-behind
file (with a .cs or .vb
extension, depending on its language), which is another way of saying
the “code file behind the form.”
In the code-behind file, you create a
class (which
can be any class derived from the Page class) that serves as the base
class for the web page you create in the .aspx
file. This relationship between your class and the web page is
established by a Page
directive at the top of the
.aspx file:
<%@ Page inherits="CodeBehindDemo" %>
The inherits
attribute identifies
the class created in the code-behind file from which this
.aspx file will derive.
When a web form is compiled, its page is parsed and a new class is generated and compiled. This new class derives ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.