Introduction to ASP'NET

1
Introduction to ASP.NET

• BCS2203
• Web Application Development
• Nor Azhar Bin Ahmad

2
Outline

• Why ASP.NET?
• .NET Framework
• ASP.NET Features
• Object Oriented
• Event driven
• Server controls
• Summary

3
Why ASP.NET?

• Industrial Strength
• ASP PHP fine for small sites
• Lack structure
• Poor separation of code content
• .NET aimed at corporate users
• Employers of UMP graduates
• Full-featured
• Highly customizable

4
.NET

• PHP/ASP
• .NET

5
.NET Framework

• Create both web Windows applications
• Different interface
• Same plumbing
• Support for many languages
• VB, C, J, Java, C, PERL, Python, Effiel,
  Cobol, ..
• 15 in development
• Runs on several operating systems
• Windows, Unix
• Under development Linux FreeBSD
• Mono project

6
.NET Framework

• Two major components
• Common Language Runtime (CLR)
• Manages compilation, memory, security,
  exceptions, garbage collection, etc.
• Technical details outside scope of this class
• Class Library

7
.NET Class Library

• Library contains 5,000 classes
• Classes are pre-written code
• Web server controls, access data, manipulate
  data, send email, etc.
• Classes are grouped into Namespaces
• .NET Class Library
• Class Library is like a huge Lego set

8
.NET Features

• Object Oriented
• Event Driven
• Web Server Controls
• Visual Studio

9
1. Object Oriented

• Advantages
• Reusability
• Build once, test, reuse many times
• Important for large/complex projects
• Disadvantages
• Abstract concepts
• New terminology
• OOP concepts terminology are universal

10
2. Event Driven

• Code executes in response to events
• Typical events
• User clicks a button
• User adds or changes text in a textbox
• User clicks radio button
• Web form is posted to server
• Triggers many other events
• We write code to handle events
• Advantage
• Code more organized

11
3. Web Server Controls

• Controls that write HTML JavaScript
• Replaces response.write (ASP) echo (PHP)
• Advantages
• We write less HTML Javascript
• Validation controls
• Control data automatically saved
• Device sensitive
• Disadvantage
• Must learn control features

12
3. Web Server Controls

• Three types
• Simple
• textbox, button, checkbox, dropdownlist, label,
  etc.
• Validation Controls
• Validate user inputs
• Rich Controls
• Calendar, navigation, ad-rotator
• Example
• Hello.aspx

13
4. Visual Studio

• Integrated Development Environment
• Features
• Drag drop
• Web Server Controls
• IntelliSense
• Syntax checking
• pop-up class documentation
• Debugger
• HUGE time saver
• Faster learning

14
Summary

• ASP.NET
• Sophisticated
• State-of-the-art programming technology
• Tremendous functionality
• Complex!!
• Be prepared to work hard
• Fun!!