an introduction to.net
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An Introduction to .NET
ASP.NEThttp://sdetu/courses/sdetc101/
Lecture 04
Thursday, February 14, 2008
http://sdetu/courses/sdetc101/http://sdetu/courses/sdetc101/ -
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Agenda
Quick recap
Introduction to .NET
Introduction to ASP.NET
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Introduction to .NET
.NET ?
Business strategy from Microsoft to converge personal
computing with the web.
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What is a framework?
A set of software routines that provide a foundation structure
for an application.
Frameworks take the tedium out of writing an application
from scratch.
Object-oriented application frameworks, which are the norm
today, are structured as a class library.
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.NET Framework
.NET + Framework = .NET Framework
It is an environment for building, deploying, running webservices and other applications.
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Objective of .NET Framework
To provide consistent Object Oriented programming
environment.
Provide code execution environment:
Which reduces security flaws.
Which reduces version conflicts.
Which increases performance of application.
Which can be used for widely varying types of applications, such as
Windows-based applications and Web-based applications.
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What is .NET Framework made up of?
The class Libraries which take out tedium in developers work.
The Common Language Runtime which manages the code which is
executing.
Memory Management.
Thread Management.
Exception handling.
Garbage collection
Security
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What is .NET Framework?
The middle man
Operating System + Hardware
.NET Framework
.NET Application
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.NET Frameworkommon Language Runtime
Operating SystemOperating System
Common Language RuntimeCommon Language Runtime
CLR manages code execution at runtime Memory management, thread management, etc. Code-based security Role-based security
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.NET Frameworkase Class Library
Operating SystemOperating System
Common Language RuntimeCommon Language Runtime
.NET Framework (Base Class Library).NET Framework (Base Class Library)
Object-oriented collection of reusable types
Collections, I/O, Strings,
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.NET Frameworkta Access Layer
Operating SystemOperating System
Common Language RuntimeCommon Language Runtime
.NET Framework (Base Class Library).NET Framework (Base Class Library)
ADO .NET and XMLADO .NET and XML
Access relational databases
Disconnected data model
Works with XML
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.NET FrameworkP.NET & Windows Forms
Operating SystemOperating System
Common Language RuntimeCommon Language Runtime
.NET Framework (Base Class Library).NET Framework (Base Class Library)
ADO .NET and XMLADO .NET and XML
ASP .NETASP .NETWeb Forms Web ServicesWeb Forms Web Services
Mobile Internet ToolkitMobile Internet Toolkit
WindowsWindows
FormsForms
Create applications front-end Web-based user
interface, Windows GUI, Web services,
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.NET Frameworkommon Language Specification
Operating SystemOperating System
Common Language RuntimeCommon Language Runtime
.NET Framework (Base Class Library).NET Framework (Base Class Library)
ADO .NET and XMLADO .NET and XML
ASP .NETASP .NETWeb Forms Web ServicesWeb Forms Web Services
Mobile Internet ToolkitMobile Internet Toolkit
WindowsWindows
FormsForms
Common Language SpecificationCommon Language SpecificationC++C++ C#C# VBVB PerlPerl J#J#
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.NET Frameworkisual Studio .NET
Operating SystemOperating System
Common Language RuntimeCommon Language Runtime
.NET Framework (Base Class Library).NET Framework (Base Class Library)
ADO .NET and XMLADO .NET and XML
ASP .NETASP .NETWeb Forms Web ServicesWeb Forms Web Services
Mobile Internet ToolkitMobile Internet Toolkit
WindowsWindows
FormsForms
Common Language SpecificationCommon Language Specification
C++C++ C#C# VBVB PerlPerl J#J#
V
isualStudio
.NET
V
isualStudio
.NET
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.NET Framework Architecture
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Common Language Runtime (CLR)
The core runtime engine in the Microsoft .NET Framework for
executing applications.
.NET equivalent of the Java Virtual Machine, although JVM
currently supports only the Java language.
Activates objects, performs security checks on them, lays them
out in memory, executes them, and garbage-collects them.
Code running in CLR is referred to as managed code.
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Jargon Buster
Managed Code:code that is written to target the
services of the managed runtime execution
environment (like CLR)
Why managed???Managed refers toa method of
exchanging information between the program and the
runtime environment
Then Unmanaged Code???
Code that is directly executed by the OperatingSystem is known as un-managed code.
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Languages Supported by .NET
Perl
Python
COBOL
Jscript
Eiffel Java
APL
Haskell
Pascal
ML
Ada
C
C++
Visual Basic
C#
SmallTalk
Oberon
Scheme
Mercury
Oz
RPG
Objective Caml
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Intermediate Language (IL)
.NET languages are not compiled to machine code. They are compiled to an
Intermediate Language (IL).
CLR accepts the IL code and recompiles it to machine code. The recompilation is
just-in-time (JIT) meaning it is done as soon as a function or subroutine is called.
The JIT code stays in memory for subsequent calls. In cases where there is not
enough memory it is discarded thus making JIT process interpretive.
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JIT Compilation
Dynamically compiles IL code to managed native code that is optimized
for execution on a target Operating System
For optimization reasons, JIT compilation occurs only the first time a
method is invoked.
The compiled native code lies in memory until process shuts down and
garbage-collection takes place.
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.NET Framework Architecture
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What CLR gives to your Applications
CLR makes your applications:
Platform Independent
Hardware Independent
Language Independent
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The .NET Framework and Visual Studio .NET
Base Class LibraryBase Class Library
Common Language SpecificationCommon Language Specification
Common Language RuntimeCommon Language Runtime
ADO.NET: Data and XMLADO.NET: Data and XML
Visual BasicVisual Basic C++C++ C#C#
VisualStudio
.NET
Vi
sualStudio
.NET
ASP.NET: Web ServicesASP.NET: Web Services
and Web Formsand Web Forms
JScriptJScript
WindowsWindows
FormsForms
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ASP.NET
Base Class LibraryBase Class Library
Common Language SpecificationCommon Language Specification
Common Language RuntimeCommon Language Runtime
ADO.NET: Data and XMLADO.NET: Data and XML
Vi
sualStudio
.NET
VisualStudio
.NET
ASP.NET: Web ServicesASP.NET: Web Services
and Web Formsand Web FormsWindowsWindows
FormsForms
Visual BasicVisual Basic C++C++ C#C# JScriptJScript
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10 Reasons You Love ASP.NET!
1. Its really, really fast!
2. Deploy and upgrade running apps with XCOPY
3. Great tools support
4. Automatically detects and recovers from errors
5. Web farm scalable session state
6. Built-in output caching
7. Supports wide range of mobile devices
8. Uses compiled languages
9. Makes building web services easy
10. Much simpler page development model
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ASP NET
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ASP.NETArchitecture (Page Request)
ASPX
.ASPX.ASPX
ASP NET
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ASP.NETArchitecture (First Time)
.ASPX.ASPXCompiledCompiled
ASP NET
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ASP.NETArchitecture (Compiled Only Once)
.ASPX.ASPXCompiledCompiled
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ASP.NETArchitecture (Any Modifications)
.ASPX.ASPXCompiledCompiled .ASPX.ASPXCompiledCompiled
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Visual BasicVisual BasicSourceSource
codecodeCompilerCompiler
C++C++C#C#
CompilerCompilerCompilerCompiler
AssemblyAssemblyIL CodeIL Code
AssemblyAssemblyIL CodeIL Code
AssemblyAssemblyIL CodeIL Code
Operating System ServicesOperating System Services
Common Language RuntimeCommon Language Runtime
JIT CompilerJIT Compiler
Native CodeNative Code
ManagedManagedcodecode
UnmanagedUnmanaged
ComponentComponent
ASP.NET Execution Model
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ASP.NET Features
ASPX, ASP side by side
Simplified programming model
Simplified deployment
Better performance
Caching
Security
Powerful controls
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ASP.NET Features
Simplified browser support
Simplified form validation
Code behind pages
More powerful data access
Web services
Better session management
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ASP.NET Features
XCOPY Deployment.
Simplified configuration deployment.
Custom server controls.
Code Behind Logic.
Event Delegation Model.
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Summary
Got an Idea what is .NET?
Why .NET is getting so popular ?
What is ASP.NET?
How it works ?
Hope you started loving .NET !!!
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