Session 1

Building Applications using ASP.NET and C# / Session 1 / 1 of 21

Session 1Session 1


Session ObjectivesSession Objectives Describe the following -

• Web application• Web application development cycle

Explain Active Server Pages

Explain the features of ASP.NET


ActiveX Data Objects(ADO)

ActiveX Data Objects(ADO)

DatabaseDatabase

Client 1 (Browser)

Client 2 (Browser)

Client 1

Client 2

Client/Server and Client/Server and Web ApplicationsWeb Applications


Web-enabled Application ArchitectureWeb-enabled Application Architecture

Proxy ServerProxy Server

Internet

Internet

Database

Server

Web server

HTTP

Web server

HTTP

Certificate Server

Server-based programsASPCGIISAPI

Server-based programsASPCGIISAPI

Other serversFTPSMTPExchange Server

Other serversFTPSMTPExchange Server

Client 1 (Browser)


HTTP at workHTTP at work

Client (Browser)

Client (Browser)

Send me “Introduction to

Hypertext”

Send me “Introduction to

Hypertext”

Page Request

Introduction to Hypertext


Network Interface Network Interface and HTTP Serviceand HTTP Service

Network Interface

Transport Layer andInternet Layer

(TCP / IP)

Windows Sockets

HTTP FTP

Internet


Accessing Database Accessing Database InformationInformation

InternetClient (Browser)

ODBCDatabase

ServerDatabase

Server

Web server

HTTP

Web server

HTTP


Web Application Web Application Development CycleDevelopment Cycle

Designing the application Designing the application

Constructing and testing the components of the applicationConstructing and testing the components of the application

Going live Going live

Production and Maintenance Production and Maintenance

Planning the Web application


Web Application Web Application Development Development

ProcessProcess

Functional Specifications

complete?

Functional Specifications

complete?No

Design PhaseDesign Phase

Design complete?

Design complete?

Planning PhasePlanning Phase

Yes

Construction and Testing

Construction and Testing

Complete?Complete?

Going LiveGoing Live

Production and Maintenance

Production and Maintenance

AA

AA

No

Yes

No

Yes


ScriptingScriptingData entry

ProcessingProcessingWeb Server: CGI Scripts

Web Server: CGI Scripts

Web client: Browser

Processing

Data entry

ProcessingProcessing



Web client:Browser

JavaScript VBScript


Validating DataValidating Data

HTML FormHTML Form

User inputUser input

JavaScript data validation

JavaScript data validation

Data valid?

Valid DataValid DataSubmit data

to serverSubmit data

to server

Yes

No

Client-Side Client-Side ScriptingScripting

Provide user interaction

Dynamically change content

Validate data

Integration

<script language="JavaScript"></script>

Specifies the scripting language

comment tags


Active Server Active Server PagesPages

<HTML><BODY><CENTER><I><FONT COLOR="HOTPINK" size = 5><%If Time >= #12:00:00 AM# And Time < #12:00:00 PM#

Then%> "Now the time is between 12:00 am and 12:00 pm"

<%Else%>" Now the time is between 12:00 pm and 12:00 am"

<%End If%></FONT></I></CENTER></BODY></HTML>

Executed on server


Processing of ASP Processing of ASP filefile

Client (Browser)

ASP.DLLASP.DLL

IISIISVBScriptVBScript

JavaScriptJavaScript

ActiveX Data Objects

(ADO)

ActiveX Data Objects

(ADO)

DatabaseDatabase ASP file


Advantages of ASPAdvantages of ASP


ASP file in a Web-ASP file in a Web-based applicationbased application

Client (Browser)

Active Server

Components

Active Server

Components

DatabaseDatabase

Active Server Pages (ASP)

•JavaScript•VBScript












Evolution of Evolution of ASP.NETASP.NET


Drawbacks of ASPDrawbacks of ASP

Interpreted ASP pages

Only two non-typed languages VBScript and JavaScript

Spaghetti-like mixture of code, HTML and text

Using the same file.

Extra code for functionality

No Re-usage of code

No debugging mechanism

Shut down of web server to install a new version of a DLL


Advantages of Advantages of ASP.NETASP.NET

ASP.NETASP.NET

Supports strongly typed languages like C#, VBSupports strongly typed languages like C#, VB

Compiled pages improving execution speed Compiled pages improving execution speed

Supports re-use of code by the mechanism of inheritance Supports re-use of code by the mechanism of inheritance

ASP code is separated from the HTML design and textASP code is separated from the HTML design and text

Provides server controls that are declarative Provides server controls that are declarative

An inbuilt method Trace, helps in debugging a page An inbuilt method Trace, helps in debugging a page

No need to register component. No need to register component.


Features of Features of ASP.NET - 1ASP.NET - 1

ASP.NETASP.NET

Recognizes the type of client browser and accordingly display the contents to the client. Recognizes the type of client browser and accordingly display the contents to the client.

Adds functionality using C# or VB.NET Adds functionality using C# or VB.NET

Uses server - side caching Uses server - side caching

Ships with many built-in server controlsShips with many built-in server controls


Features of Features of ASP.NET - 2ASP.NET - 2

Refers hierarchical namespaces. Refers hierarchical namespaces.

Global.asax file holds additional eventsGlobal.asax file holds additional events

Web service - a function deployed and used over the webWeb service - a function deployed and used over the web

ASP.NETASP.NET

Session 1

Documents

Transcript of Session 1