Introduction to ASP .NET - PowerPoint PPT Presentation

About This Presentation
Title:

Introduction to ASP .NET

Description:

Introduction to ASP .NET Prehistory of ASP .NET Original Internet text based WWW static graphical content HTML (client-side) Need for interactive and animated ... – PowerPoint PPT presentation

Number of Views:323
Avg rating:3.0/5.0
Slides: 14
Provided by: jmu106
Learn more at: http://cob.jmu.edu
Category:
Tags: net | asp | net | introduction

less

Transcript and Presenter's Notes

Title: Introduction to ASP .NET


1
Introduction to ASP .NET
2
Prehistory of ASP .NET
  • Original Internet text based
  • WWW static graphical content ? HTML
    (client-side)
  • Need for interactive and animated content ?
    Javascript (client-side)
  • Need for database-driven web sites ? CGI, ASP,
    JSP, PHP, ColdFusion (server-side)

3
About Processing on the Web
  • Hypertext Transfer Protocol (HTTP)
  • Request-Response Model
  • Statelessness of the web

4
browser builds an HTTP request and sends it to
the IP address indicated by the URL.
Web server
Web server on the destination host machine
(identified by IP address) receives the request
and, after any necessary processing, the
requested file is returned.
Safari
5
Web Server
  • Running on Host
  • In Microsoft world this is Internet Information
    Server (IIS)
  • Linux ? Apache
  • With ASP and .NET Framework, IIS can produce
    dynamic content (automatically-generated

6
Technologies for Server Side Processing
  • CGI Common Gateway Interface
  • Java Server Pages (JSP), Java Servlets
  • ActiveX Server Pages (ASP)
  • PHP Preprocessor (PHP)
  • ASP .NET

Server-side processing enables 3-tier
architectures
7
Three-Tier Architectures
  • Three layers
  • Client
  • Application server
  • Database server

Browser (with HTML/Javascript)
GUI interface (I/O processing)
Web Server (with ASP .NET)
Business rules
Data storage
DBMS
  • Thin Client
  • PC just for user interface and a little
    application processing. Limited or no data
    storage (sometimes no hard drive)

8
Three-tier architecture
Thinnest clients
Business rules on separate server
DBMS only on DB server
9
Problems with Old ASP
  • Code mixing (HTML, Javascript, VBScript inline) ?
    hard to understand and maintain
  • Interpreted ? no compiled ahead of time, slows
    processing
  • ASP .NET allows for both code separation and
    pre-compiled processing
  • Same is true with PHP and JSP
  • Frameworks exist for both to enable code
    separation

10
ASP .NETs improvements over old ASP
  • More object-oriented and event-driven
  • robust class library
  • ability to create more efficient and reusable
    code
  • Multiple Language Support (VB, C, C,
    JScript.NET)
  • via Common Language Runtime
  • other languages can be added to the list
  • Powerful control objects (server controls, user
    controls)
  • automatic HTML-generators
  • Code Separation Support
  • can separate HTML code (display) from VB/C code
    (server side processing) through use of server or
    user controls
  • use of code-behind files
  • Smart Code Output
  • automatic generation of browser/device compatible
    output
  • use of form validation controls
  • Deployment - easier administration of web sites
  • simplicity in installing components
  • Use of web.config file for configuration
  • and bin directory for Assemblies (DLLs)

11
(No Transcript)
12
.NET Framework Terms
  • NET Framework software framework that runs
    primarily on Microsoft Windows.
  • Framework
  • Common Language Runtime (CLR) run time
    environment that provides the underlying
    infrastructure for Microsoft's .NET framework
    (pp17-18)
  • Assembly a .dll file (dynamic link library)
    that contains executable code compiled for the
    CLR (pp14-17)

13
http//en.wikipedia.org/wiki/.NET_Framework
These compilers generate managed code. Managed
code is code that is run within the Common
Language Infrastructure (CLI).
Common Intermediate Language (CIL) is like
Javas bytecode
Common Language Runtime (CLR) is like Javas
virtual machine
Virtual Execution System (VES) is the simulated
CPU upon which the CLR operates.
Note Visual C can compile into either managed
or unmanaged code. Unmanaged code is compiled
directly to the machine language of the CPU, and
is not part of the CLR
Write a Comment
User Comments (0)
About PowerShow.com