ASPdotNET Presentation Part1

8/14/2019 ASPdotNET Presentation Part1

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.Net

Table of contents Introduction to VS 2005 Application and Page Frameworks GUI Controls Validation Server Controls Working with Master Pages Themes & Skins Collections & Lists

Data Binding Data Management with ADO.Net Working with XML Site Navigation Security State Management Caching Debugging & Error Handling File I/O & Streams Configurations


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What can you find in a VS

We can see these windows when we open

the Visual Studio

Property Window Shows the properties of a

control(Page or button or textbox)

Solution Explorer Shows the files that a

opened project has

Output Window Shows the result of acompilation or execution of a program

Error List Shows the compilation errors etc.


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IIS Internet Information Services IIS is a web server that comes along with .Net

We can configure IIS using inetmgr

In the Start Menu, choose Run and type inetmgr. We willget a window that lists the websites present in thesystem.

For creating a virtual directory, right click on the default

website and select New -> Virtual Directory. Give the alias name Give the physical path Give the access permissions and click finish.


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ASP .Net

Used to create web applications and web

services that run under IIS

ASP.NET is a collection of .NET classes

that collaborate to process an HTTP

request and generate an HTTP response

Helps us in creating Dynamic Web pages

Dynamic web pages Pages will be

generated at the server based on the usersrequest and then given back to the client

(user)


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ASP .Net Framework

ASP.NET is a managed server-side framework For building applications based on HTTP, HTML, XML

and SOAP

ASP.NET relies on IIS for an HTTP entry point

ASP.NET supports building HTML-based WebApplications

Based on ASP.NET pages, Web forms and server-

side controls

ASP.NET supports building Web Services

Based on Web service classes and WebMethods


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Life cycle of a web application

The Life of web application begins when a user requests

for a page through the browser (client)

When IIS receives request from client it calls ASP. NET

worker process

The ASP.NET worker process loads the assembly

The executable creates an instance of web form

Generates the HTML page to respond to the request

Posts the response to browser and then it destroys the

instance of the web form

Then browser receives the generated HTML


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Life cycle of a web application

(Contd..)

Client Performs tasks like button click

The pages data is sent back to server

When server receives this page it createsnew instance of web form

Processes the event occurred

Then again send back HTML and destroys

the page When user stops the web application for a

period of time session ends


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ASP .Net Advantages Executable portion of a web application are compiled

Enriched tool support Applications are based on CLR

Common Language Runtime

On the fly updates deployed without restarting server

Better session management

Integration with ADO.NET

Built in features for caching

Create XML Web services

Browser-independent

Language-independent


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Application and PageFramework


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ASP .Net Applications

Each application is based on IIS virtual

directory

Each application is contained within a

physical directory

Each application runs in its own isolatedAppDomain

Namespace must for this application is

System.Web


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ASP .Net Pages

Code and Design are separated

Design file ASPX file

Contains ASPX or HTML tags

Code file called as code behind file Has the programming logic

Programming language can be

C# VB .Net


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ASP .Net Pages (Contd..)

ASPX Page has

C# file will have btnSubmit_Click() { ... }

The code behind page is inherited fromSystem.Web.UI.Page class

The .aspx file containing the user interface

is inherited from code behind class


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Files in a Web application Project AssemblyInfo.cs

All the information about assembly including version, companyname etc

Default.aspx

The visual description of a Web form.

Default.aspx.cs

The code behind that responds to events on the Web form

Default.aspx.resx

XML resources used by web form

Global.asax

The global events that occur in web applications Web.config

Configuration contents like authentication mode, error files etc.


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GUI Controls


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Server Control


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Web Controls

ListControl

ListBox

CheckBoxList

Button

Table

WebControl

System.Web.UI.Control

System.Object

TextBox

......


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Postback event

These events cause the web page to besent back to the server for immediate

processing

When page is posted back ,the Page_Init,Page _Load events are handled

The page is submitted back and renders a

new version of itself back to the user


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Validation Controls ASP .Net provides 5 validation controls that are

used to check the validity of data entered by theuser in the server controls on the web page. Client side validation is also possible through a

Jscript library WebUIValidation.js Required field validator Regular expression validator Compare validator Range validator Custom validator

Validation summary


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Required Field Validator To check whether a control contains data

Properties:

ControlToValidate

ErrorMessage

Text

Method:

Validate


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Regular Expression Validator

To check whether the entered data matches a specific

format

Properties ControlToValidate

ValidationExpression ErrorMessage

Method Validate


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Compare Validator

To compare values entered in two controls

Properties:

ControlToCompare

ControlToValidate ErrorMessage

ValueToCompare

Method:

Validate


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Range Validator

To compare whether the entered value is

between two specified values

Properties: ControlToValidate

ErrorMessage Type MaximumValue MinimumValue

Method: Validate


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Custom Validator

To Check the validity of an entered item using aclient-side script or a server-side code, or both

Properties:

ControlToValidate ErrorMessage

Events: ServerValidate

Method: OnServerValidate

Validate


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Validation Summary

To Display validation errors in a central location ordisplay a general validation error description

Properties:

HeadText ShowMessageBox

ShowSummary


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User Controls

We can create our own controls in addition to HTML and Webcontrols

User controls offer you an easy way to partition and reuse commonuser interface (UI) functionality across your ASP.NET Webapplications

User controls are not compiled until run time You can simply drag and drop them on the page and start using

them

To create a user control: Add a new item ( select user control as a template) and give it a name

Heading.ascx

The following description can be seen in HTML view


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Using a User Control

To use a user control, just drag the ascx

file from the solution explorer and drop it

on the design area of the aspx page

Or give like this in the html view of the

aspx page In the head portion

Container represents the container for data items

DataFieldname represents the name of data item field

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ASPdotNET Presentation Part1

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