Developing an aspnet web application

Company Profile

 Welcome to Satyam Software Solutions Pvt. Ltd.
 The people of S-CUBE have strong interests in
embedded systems development.
 S-CUBE has provided reliable, cost-effective solutions
that enable organization to deter counterfeiting enhance
software, security and facilitate the effectiveness of
embedded application programs.
 We are developing generic NANO OS which is flexible,
dynamic, and easy manageable for Sensor network
application programmer. We are aiming towards
developing NANO OS for Robotic development and
other solutions.

Company Profile

 Hardware Development:
 Microprocessor board development
 Custom board development
 Power board development

Agenda

 Overview of .NET
 Overview of ASP.NET
 Creating an ASP.NET Web Form
 Validating User Input

What is the .NET Framework?

Developer Clients
Tools

ASP.NET Web
Databases Applications

XML Web User
.NET Services Experiences
Framework

Benefits of .NET

 Fully object-oriented languages
 Common runtime engine shared by all languages
 Base class library usable by all languages
 Simplified deployment
 Better security
 Better performance
 Language independent
 Solves existing problems:
 Even with the Internet, most applications and devices have
trouble communicating with each other

The .NET Framework Components

Visual
Basic C++ C# Perl Python …

XML Web Services User Interface
ASP.NET

ADO.NET and XML

.NET Framework Class Library

Common Language Runtime

OS

How is language interoperability achieved?

 All .NET languages must follow the rules in the Common
Language Specification (CLS).
 These rules define a subset of common data types and
programming constructs that all .NET languages must
support.
 All .NET languages are compiled into a common format.
 All code is compiled into Microsoft Intermediate
Language (MSIL), also called Common Intermediate
Language (CIL or simply IL), rather than binary.

The Common Language Runtime

 The CLR is the execution engine for .NET framework
applications.
 provides a common runtime environment for the
execution of code written in any of the .NET languages
 Manages threads and memory
 Garbage collection
 Enforces code security
 CLR and Java's JVM are similar in that they are both
runtime infrastructures that abstract the underlying
platform differences

.NET Framework Base Class Library

 The .NET Framework base class library (BCL) is a large set of
standard classes and other types.
 This library includes classes for:
 working with the base types and exceptions,
 representing common data structures and collections,
 performing data access,
 constructing Windows and Web interfaces.
 It contain Core Set Of Classes:
 Ms Core.dll
 System.dll
 System.core.dll

Multiple Language Support

 The .NET Framework is designed to support many
languages
 More than 20 languages currently supported
 Microsoft provides Visual Basic .NET, C#,
Visual J# .NET, and JScript .NET
 Benefits of multiple-language support
 Code modules are reusable
 Class Library access is the same for all languages
 The right language is used for the right task
 Performance is roughly equal between all languages

Overview of ASP.NET

 Creation, deployment, and execution of Web Applications and Web
Services
 ASP.NET is a Microsoft Technology
 ASP stands for Active Server Pages
 Server Side Scripting
 Language Interoperability
 Browser Independent
 Controls and infrastructure simplify the building of Web
Applications
 Interactive Web application & DataBase management
 ASP.NET is a program that runs inside IIS

How does ASP.NET work?

 Requests an HTML file, the server returns the file

 Requests an ASP.NET file, IIS passes the request to the ASP.NET
engine on the server

 The ASP.NET engine reads the file, line by line, and executes the
scripts in the file

 ASP.NET file is returned to the browser as plain HTML

ASP.NET Runtime Compilation and Execution

default.aspx

Which language?

C# Visual Basic .NET

C# Visual Basic .NET
compiler compiler

JIT MSIL
compiler

Common
Language
Native
code
Runtime

Master Pages

 Master pages allow you to create a consistent look and
behavior for all the pages (or group of pages) in your
web application.
 The content pages contains the content you want to
display.
 When users request the content page, ASP.NET merges
the pages to produce output that combines the layout of
the master page with the content of the content page.
 This master page was saved with the
name "master1.master".
 Note: The master page can also contain code, allowing
dynamic content.

How to Implement Code

 Three methods for adding code:
 Put code in the same file as content (mixed)
 Put code in a separate <SCRIPT> section of the content
file (inline code)
 Put code in a separate file (code-behind pages) Code-Behind Page

 Code-behind pages are the Visual Studio .NET default
Single file Separate files
code
<tags> code
<tags>
Form1.aspx Form1.aspx Form1.aspx.vb
or Form1.aspx.cs

Selecting the Appropriate Control

Use HTML Server Controls if: Use Web Server Controls if:

You prefer an HTML-like object You prefer a Visual Basic-like
model programming model
You are working with existing
You are writing a page that
HTML pages and want to quickly
might be used by a variety of
add ASP.NET Web page
browsers
functionality
The control will interact with You need specific functionality
client and server script such as a calendar or ad rotator

Bandwidth is limited Bandwidth is not a problem

Navigation

 Maintaining the menu of a large web site is difficult and
time consuming.
 In ASP.NET 2.0 the menu can be stored in a file to make
it easier to maintain. This file is normally
called web.sitemap, and is stored in the root directory of
the web.
 In addition, ASP.NET 2.0 has three new navigation
controls:
 Dynamic menus
 Tree Views
 Site Map Path

What Is Input Validation?

 Verifies that a control value is correctly entered by the
user
 Blocks the processing of a page until all controls are
valid
 Avoids spoofing
or the addition of
malicious code

Client-Side and Server-Side Validation

 ASP.NET can create both
client-side and server-side User Enters
validation Data Error
 Client-side validation Message

 Dependent on browser Valid?
version No
 Instant feedback Client Yes
Server
 Reduces postback cycles
Valid?
 Server-side validation No
Yes
 Repeats all client-side
validation Web Form
 Can validate against Processed
stored data

ASP.NET Validation Controls

Control Name Purpose
RequiredFieldValidator Require user input
CompareValidator Compare to another control, a
value, or a data type
RangeValidator Compare to a range
CustomValidator Compare to a custom formula
RegularExpressionValidator Compare to a regular expression
pattern
ValidationSummary Summarize the state of the
validation controls on a page

Summary

 ASP .NET simplifies Web Application development
 Scalable, better performing applications
 Makes developers more productive
 Makes systems more reliable
 Makes systems easier to deploy

Developing an aspnet web application

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