An Introduction to.net

8/14/2019 An Introduction to.net

1/38

An Introduction to .NET

ASP.NEThttp://sdetu/courses/sdetc101/

Lecture 04

Thursday, February 14, 2008
http://sdetu/courses/sdetc101/http://sdetu/courses/sdetc101/


2/38

14 Feb 2008 ASP.NET 2

Agenda

Quick recap

Introduction to .NET

Introduction to ASP.NET


3/38


Introduction to .NET

.NET ?

Business strategy from Microsoft to converge personal

computing with the web.


4/38


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.


5/38


.NET Framework

.NET + Framework = .NET Framework

It is an environment for building, deploying, running webservices and other applications.


6/38


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.


7/3814 Feb 2008 ASP.NET 7

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


8/38


What is .NET Framework?

The middle man

Operating System + Hardware

.NET Framework

.NET Application


9/38


.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


10/38


.NET Frameworkase Class Library



.NET Framework (Base Class Library).NET Framework (Base Class Library)

Object-oriented collection of reusable types

Collections, I/O, Strings,


11/38


.NET Frameworkta Access Layer




ADO .NET and XMLADO .NET and XML

Access relational databases

Disconnected data model

Works with XML


12/38


.NET FrameworkP.NET & Windows Forms





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,


13/38


.NET Frameworkommon Language Specification







WindowsWindows

FormsForms

Common Language SpecificationCommon Language SpecificationC++C++ C#C# VBVB PerlPerl J#J#


14/38


.NET Frameworkisual Studio .NET







WindowsWindows

FormsForms

Common Language SpecificationCommon Language Specification

C++C++ C#C# VBVB PerlPerl J#J#

V

isualStudio

.NET

V

isualStudio

.NET


15/38


.NET Framework Architecture


16/38


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.


17/38


18/38


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.


19/38


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


20/38


21/38


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.


22/38


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.


23/38


.NET Framework Architecture


24/38


What CLR gives to your Applications

CLR makes your applications:

Platform Independent

Hardware Independent

Language Independent


25/38


The .NET Framework and Visual Studio .NET

Base Class LibraryBase Class Library



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


26/38


ASP.NET

Base Class LibraryBase Class Library



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


27/38


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


28/38

ASP NET


29/38


ASP.NETArchitecture (Page Request)

ASPX

.ASPX.ASPX

ASP NET


30/38


ASP.NETArchitecture (First Time)

.ASPX.ASPXCompiledCompiled

ASP NET


31/38


ASP.NETArchitecture (Compiled Only Once)

.ASPX.ASPXCompiledCompiled


32/38


ASP.NETArchitecture (Any Modifications)

.ASPX.ASPXCompiledCompiled .ASPX.ASPXCompiledCompiled


33/38


Visual BasicVisual BasicSourceSource

codecodeCompilerCompiler

C++C++C#C#

CompilerCompilerCompilerCompiler

AssemblyAssemblyIL CodeIL Code



Operating System ServicesOperating System Services


JIT CompilerJIT Compiler

Native CodeNative Code

ManagedManagedcodecode

UnmanagedUnmanaged

ComponentComponent

ASP.NET Execution Model


34/38


ASP.NET Features

ASPX, ASP side by side

Simplified programming model

Simplified deployment

Better performance

Caching

Security

Powerful controls


35/38


ASP.NET Features

Simplified browser support

Simplified form validation

Code behind pages

More powerful data access

Web services

Better session management


36/38


ASP.NET Features

XCOPY Deployment.

Simplified configuration deployment.

Custom server controls.

Code Behind Logic.

Event Delegation Model.


37/38


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 !!!


38/38
http://www.mtech.edu/outreach/EYH/EHY%20Thank%20you.gif

Documents

An Introduction to.net