Slides ASP.net La1010 Lc 01

8/12/2019 Slides ASP.net La1010 Lc 01

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ER/CORP/CRS/LA1010/003 Ver. No.: 4.0 Copyright 2008, Infosys Technologies Ltd.

Education and Research We enable you to leverage knowledge anytime, anywhere!

ASP.NET 3.5 Web Applications and Web

Services (Long Cycle)

Day 1


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Copyright 2008, Infosys Technologies Ltd.

Confidential Information

This Document is confidential to Infosys Technologies Limited. This document

contains information and data that Infosys considers confidential and proprietary(Confidential Information). Confidential Information includes, but is not limited to, the following:

Corporate and Infrastructure information about Infosys Infosys project management and quality processes Project experiences provided included as illustrative case studies

Any disclosure of Confidential Information to, or use of it by a third party, will be

damaging to Infosys.Ownership of all Infosys Confidential Information, no matter in what media it resides,remains with Infosys.Confidential information in this document shall not be disclosed, duplicated or used in whole or in part for any purpose other than reading without specific writtenpermission of an authorized representative of Infosys.This document also contains third party confidential and proprietary information.

Such third party information has been included by Infosys after receiving due writtenpermissions and authorizations from the party/ies. Such third party confidential andproprietary information shall not be disclosed, duplicated or used in whole or in part

for any purpose other than reading without specific written permission of anauthorized representative of Infosys.

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Copyright 2008, Infosys Technologies Ltd. 4

Course Objectives

To introduce web applicationTo introduce working with dynamic pagesTo create web application using ASP.NETIntroducing AJAXTo introduce .NET Web Services


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Course Pre-requisites

Knowledge of .NET framework

C# programming languageSQL Server 2005

ADO.NET


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Expectations

At the end of the ASP.NET and Web Services module, the candidateshould be conversant with the following:

Developing web applicationsCreating and consuming Web Services


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Session Plan Day1

Web Applications

Information on ASPIIS

ASP.NET Overview ASP.NET Programming modelServer ControlsValidation ControlsUser Control


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Session Plan (Remaining Days)

Day 2

Error HandlingData Controls

ASP.NET Objects

Day 3State ManagementMaster PagesNavigation ControlsThemes, Styles and Skins

Day 4

Caching AJAX

Day 5Web Services

Security Aspects in ASP.NET

Day 6 and 7Project


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References

http://msdn2.microsoft.com/en-us/netframework/default.aspx

http://www.gotdotnet.comhttp://mealserver01/MELL/default.htmhttp://www.asp.net/Professional ASP.NET 3.5

Anderson,Francis,Howrad,Sussman,Watson(Wrox Publications)

Beginning ASP.NET 3.5 ,Ullman,Sussman,Kauffman,Hart,Maharry( WroxPublications)Murachs ASP.NET upgraders guide


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Introduction to Internet & Web-Applications


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Working of Internet

Web Server

Servers File

System

The Internet


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HTTP Request

The following is the request generated

The first thing specified by a Request is a HTTP command called METHODGET

POSTThis will be followed by

the path of the document the browser requiresthe version of HTTP used by the client

GET http://www.yahoo.com/ HTTP/1.1


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HTTP Response

The server processes the request and sends a Response

The following is an example of a response

HTTP/1.1 200 OK

Date: Sat, 18 Mar 2000 20:35:35 GMT

Server: IIS

Last-Modified: Wed, 20 May 1998 14:59:42 GMT

Content-Length: 2000

Content-Type: text/html


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Dynamic Pages

1. User Submits Form and resultant URL:

http://abcbooks.co.in/eshop/PurchaseItem?iname=Floppy+Disc&qty=12

Web Server

abcbooks.co.in

2. Send HTTP Request for eshop/PurchaseItem with

params

http://abcbooks.co.in/e

Online Shopping

Bill

Floppy Disc

Goods once sold will not be taken back Happy Shopping

Price: Rs. 240/-

3. Forwards the request to

a Server Side Program for

execution

4. Compose HTML output

Online Shopping Item

Name Floppy Disc

Quantity 12

Submit

http://abcbooks.co.in/e

5. Send HTTP Response which contains the HTML output

of the request

The Internet

Server Side Program


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Introduction to ASP

Active Server Pages (ASP) is a technology that enables the development

of dynamic web sites.

ASP files are HTML files with special tags containing source code thatprovide the dynamic content.

Active Server Pages enables server side scripting for IIS with nativesupport for both VBScript and Jscript.

ASP was the technology that was widely used for creating dynamic webpages prior to ASP.NET.

Example: The home page of ILITE

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Pros and Cons of ASP

Pros

No client-side constraints .Dynamically edit, change or add any content of a Web page .

Access any data or databases and return the results to a browser .Provide security since ASP code can not be viewed from the browser .

ASP programming minimizes the network traffic .

Cons ASP is only available for Windows (NT and 95).Not completely browser independent.Limited number of objects are available.Session state is cookie dependent.

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Difference between ASP and ASP.NET

Difference between ASP.NET and ASP

Files: File extension for ASP is .asp whereas for ASP.NET it is .aspx. In ASPglobal.asa file is used to manage some of the application events whereas in

ASP.NET global.asax file is used. In addition to global.asax file, web.config isalso used in ASP.NET.

Maintaining state between ASP and ASP.NET: .asp and .aspx pages cannotshare the same session state. To maintain session state between .asp and.aspx pages, it is necessary to use an alternative to the built-in session objectof either architecture.

Language Differences: VBScript is no longer used with ASP.NET. ASP.NETuses another .NET language VB.NET. Jscript, although still supported, hasundergone a lot of revision in order to be compliant with ASP.NET.

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Education and Research


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Introduction to IIS & ASP.NET


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Web Server IIS

Internet Information Services (IIS) 6.0 is a powerful Web server

Compatibility with Microsoft and Other ProductsRapid Installation and ConfigurationEasy Service ManagementEffortless Performance MonitoringEasy to Implement Security

Foundation for ASP.NETIIS serves as entry point for request from the client


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ASP.NET

Is the platform that we use to create Web applications and Web services

that run under IIS At a high level, ASP.NET is a collection of .NET classes that collaborate toprocess an HTTP request and generate an HTTP responseIt provides high level of consistency across web applicationsWe have components like web development tools

System.web namespace


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ASP. NET Framework

ASP.NET is a managed server-side framework

For building applications basedon HTTP, HTML, XML and SOAP

ASP.NET relies on IIS for anHTTP entry point

ASP.NET supports buildingHTML-based Web applications

Based on ASP.NET pages, Webforms and server-side controls

ASP.NET supports building Webservices

Based on Web service classesand WebMethods

ASP.NET

CLR

Windows 2000 or Windows 2003

IIS

HTML over HTTP

XML/SOAP over HTTP

Web Applicationclient

Web Service client


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Create a simple Web Application

Using Visual Studio 2008, create a simple web application

Create a web form that displays current date and time


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About .aspx page

Views

Source viewDesign viewSplit view

Understanding @Page Directive AutoEventWireUp


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Visual Studio 2008 support for ASP.NET 3.5

Provides a simpler way to create web forms applications

Supports multiple ways to open websitesSupports access of local installation of IISIIS is not a strict requirement since VS2008 ships with a local web server(makes IIS optional for at least testing &debugging)Does not compile the entire site into an assembly, instead uses ASP.NETdynamic compilation engine. Hence the changes to .aspx along withchanges to .cs or.vb files are immediately caught.


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Compilation Models in ASP.NET 3.5

ASP.NET 3.5 offers four different compilation models for a Web application:

Normal Asp.NET 1.x compilation- ASP.NET Web application, the code behind files were compiled into an assembly and

stored in the /bin directory. The Web pages (ASPX) were compiled on demand.

Deployment pre-compilation

- A new feature of ASP.NET 2.0 allows for full compilation of project prior to deployment

Full runtime compilation- ASP.NET 2.0 provides a new mechanism to compile the entire application at

runtime- The ASP.NET 2.0 compilation model also allows you to pre-compile all of the code

behind files for you and your application and still make updates to your code.

Note : Same compilation model continued for ASP.NET 3.5


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WebForms Overview

thisfile aspx

btnSubmit_Click() {...

thisfile aspx cs

d d d h d


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Code Beside Vs Code Behind

ASP.NET 3.5 introduces an improved runtime for code-behind pages that

simplifies the connections between the page and code.In this new code-behind model, the page is declared as a partial class,which enables both the page and code files to be compiled into a singleclass at runtime.

P i l Cl


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Partial Classes

The partial class in the code file contains the event handlers and thecustom code. The following is the sample code of a partial class

using System;

public partial class HelloBeside{

// Page_Load event code

void Send_Click(object sender, EventArgs e)

{

//Some code

}}

Education and Research We enable you to leverage knowledge anytime anywhere!


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We enable you to leverage knowledge anytime, anywhere!

Life-Cycle of a WebPage

W b F Lif C l E t


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Web-Form Life Cycle Events

Page_Init :

Page_Load :

Control_Event:

Page_Unload :

Page_Disposed :

This is called when page is initialized.We can declare some variables which need

to be initialized before page is loaded

The server controls are loaded in the page.This event is called every time when pageis loaded

This event is fired when control like buttonare clicked or changed

Final clean up is done

The page is released from memory

Events In A Life Cycle Of A Web Application


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Events In A Life Cycle Of A Web Application

Browser requests the page and User session starts

IIS receives request and redirects to aspnet_isapi.dll which in turn calls ASP. Net (asp_wp.exe) worker processThe ASP.NET worker process loads the assembly and creates aninstance of web formGenerates the HTML page, posts the response to browser and then it

destroys the instance of the web formBrowser receives the generated HTML

Advantages of ASP NET


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Advantages of ASP.NET

Executable portion of a web application is compiledEnriched tool support

Applications are based on CLROn the fly updates deployed without restarting serverBetter session managementIntegration with ADO.NETBuilt in features for cachingCreate XML Web servicesBrowser-independentLanguage-independent



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y g g y , y

Different Controls in ASP.NET

Server Control


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Server Control

System. Object

System.Web.UI

System.Web.UI.Control

System.Web.UI.Web Controls System.Web.UI.HTMLControls

ASP NET Server Controls


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ASP.NET Server Controls

Control Properties Method Events

TextBox Enabled, MaxLength, ReadOnly,Text Focus TextChanged

CheckBox Checked,Enabled, Text Focus Checkedchanged

RadioButton GroupName, Checked,Enabled, Text Checkedchanged

Button,LinkButton,Im

ageButton

Enabled, PostBackUrl, Text Focus Click_Raised,

Command_RaisedImage AlternateText,DescriptionUrl,ImageUrl,

ImageAlign

ImageMap CircleHotSpot,PolygonHotSpot,RectangleHotSpot, ImageUrl

Focus Click_Raised

Hyperlink Enabled,ImageUrl,NavigateUrl,Target, Text

Panel DefaultButton,Direction,GroupingText,ScrollBars

List Controls


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List Controls

Control Properties Method Events

ListItem Enabled, Selected,Text,Value SelectedIndexChanged

DropDownList SelectedIndex, SelectedItem, SelectedValue SelectedIndexChanged

RadioButtonList SelectedIndex,SelectedItem,SelectedValue,RepeatColumns, RepeatDirection, AutoPostBack

SelectedIndexChanged

ListBox SelectedIndex,SelectedItem,SelectedValue, AutoPostBack


CheckBoxList SelectedIndex,SelectedItem,SelectedValue,RepeatColumns,


BulletedList SelectedIndex,SelectedItem,SelectedValue SelectedIndexChanged

Postback Event


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Postback Event

These events cause the web page to be sent back to the server for

immediate processingWhen page is posted back, the Page_Init, Page_Load events are handledThe page is submitted to the server and renders a new version of itselfback to the user

AutoPostBack is a Property of Server Controls


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Validation Controls


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Check the validity of data entered in associated server controls on the

client before the page is posted back to the server.Supports validation on client and serverClient-side validation is provided by a JScript library namedWebUIValidation.js

Validation Controls


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RequiredFieldValidator

RegularExpressionValidatorRangeValidatorCompareValidatorCustomValidatorValidationSummary

RequiredFieldValidator


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q

ControlToValidate Property

ErrorMessage Property

RegularExpressionValidator


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ErrorMessage PropertyValidationExpression Property

CompareValidator


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ErrorMessage PropertyType PropertyControlToCompare and ValueToCompare Property



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User Controls

User Controls


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In addition to HTML and Web server controls, you can easily create your

own custom, reusable controlsEasy way to partition and reuse common user interface (UI) functionalityacross your ASP.NET Web applicationsCan be used for fragmented page cachingNot compiled until run time

Easy to Usedrag and drop them on the page and start using

Creating an User Control


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Add a new item ( select user control as a template) and give it a namewith the InfyHeading.ascxYou will get the following description in HTML view


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Drag and drop this user control on any other web-page. You will get thefollowing registration syntax in HTML view

Can you answer these questions?


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Suggest any real time scenario in which you think User Controls are bestfit?What are the advantages of using a web user control?

Summary


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How Web Applications workIntroduction to HTML and java ScriptIIS

ASP.NET Overview ASP.NET Programming modelDifferent Types Of Server Controls

HTML controlsWeb ControlsValidation ControlsUser Controls


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Thank You

The contents of this document are proprietary and confidential to Infosys Technologies Ltd. and maynot be disclosed in whole or in part at any time, to any third party without the prior written consent ofInfosys Technologies Ltd.

2008 Infosys Technologies Ltd. All rights reserved. Copyright in the whole and any part of thisdocument belongs to Infosys Technologies Ltd. This work may not be used, sold, transferred, adapted,abridged, copied or reproduced in whole or in part, in any manner or form, or in any media, without theprior written consent of Infosys Technologies Ltd.



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Appendix

Difference between ASP.NET 1.x, 2.0 and 3.5


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ASP.NET 1.x (VS 2003) ASP.NET 2.0 (VS 2005)

During the compilation of applications for .NET1.x, Visual Studio 2003 would automatically

compile only certain file types such as ASP.NETpages, Web services, user controls, HTTP

handlers, Resource files, and Global.asax classfiles. The rest of the files needed to be explicitlycompiled before finally publishing your code to

the web server.

In Visual Studio 2005, you no longer need to compile all the files into anassembly. The ASP.NET dynamic compilation engine allows to

automatically compile applications, that includes .aspx, .cs, .vb files. Thatmeans, simply create an application and publish it.

For modifying an application, you need to openthe entire project, make changes, and need torecompile again to publish the code to the web

server.

You just need to open the individual file which you want to make thechanges, and publish the code to the web server without having to

recompile.

Difference between ASP.NET 1.x, 2.0 and 3.5(contd..)


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ASP.NET 1.x (VS 2003) ASP.NET 2.0 (VS 2005) The code-behind model requires

an IIS virtual directory.The code-behind model can directly access the local installation of IIS.

The code-behind model lackssupport for FTP, local file systems,

and direct IIS access.

The code-behind model has multiple ways to open Web sites.

It requires IIS on the development

computer.

It already has a built-in Web server.

Unable to open individual pagesoutside the project.

Need not open the entire project; you can open individual pages outside the project, itis achieved through the compile-on-demand feature.

It requires explicit addition of filesto the project.

It eliminates the need to explicitly add files to the project.

In the life cycle of ASP.NET 1.xpage, the events are: Init, Load,PreRender, Unload

In ASP.NET 2.0, the NEW events are: PreInit, InitComplete, PreLoad, LoadComplete,PreRenderComplete.

Difference between ASP.NET 1.x, 2.0 and 3.5(contd..)


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The new features added into ASP.NET 3.5 apart from ASP.NET 2.0features are:

ASP.NET AJAX With ASP.NET AJAX, developers can quickly create pages with sophisticated,

responsive user interfaces and more efficient client-server communication by simplyadding a few server controls to their pages. Previously an extension to the ASP.NET

runtime, ASP.NET AJAX is now built into the platform and makes the complicatedtask of building cross-platform, standards based AJAX applications easy.

New ListView and DataPager Controls WCF Support for RSS, JSON, POX and Partial Trust LINQ and other .NET Framework 3.5 Improvements

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RangeValidator


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Properties Description

ControlToValidate Used to specify the ID of the control that is to be validated

ErrorMessage Used to specify the error message that is displayed in theValidationSummary control

Type Used to specify the data type of values

MaximumValueUsed to specify the maximum value in a range of values

MinimumValue Used to specify the minimum value in a range of values

Method Description

ValidateUsed to perform validation and set the IsValid property

ValidationSummary


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Properties Description

HeadTextUsed to set the text that will be displayed at the top of

theSummary

ShowMessageBoxUsed to display the error message in a pop-up message

boxwhen the value of this property is true

ShowSummary Used to enable and disable the summary of errormessage

Rich Controls


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Control Properties Method EventsFileUpLoad Enabled, FileName HasFile,

PostedFile, SaveAsFocus, SaveAs

Calendar SelectedDate, SelectedDates,SelectionMode, TodaysDate,

DayRender,Selection

Changed,AdRotator ImageUrlFleild AdCreated

MultiView ActiveViewIndex, Views GetActiveView, Set

ActiveView

ActiveViewChanged

DateTime


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The DateTime value type represents dates and times with values rangingfrom 12:00:00 midnight, January 1, 0001 Anno Domini (Common Era) to11:59:59 P.M., December 31, 9999 A.D. (C.E.)Few properties:

TodayNowDate

Few Methods: AddDays() AddMonths()Compare()ToLongDateString()

ToShortDateString()


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