ASP .net material Part-1

ASP.NET Tutorial - with ASP.NET 2.0
ASP.NET is the next generation ASP, but it's not an upgraded version of ASP. ASP.NET is an entirely new technology for server-side scripting.
ASP.NET is a part of the Microsoft .NET framework, and a powerful tool for creating dynamic and interactive web pages.
What You Should Already Know
Before you continue you should have a basic understanding of the following:
  • WWW, HTML, XML and the basics of building Web pages
  • Scripting languages like JavaScript or VBScript
  • The basics of server side scripting like ASP or PHP

What is Classic ASP?

Microsoft's previous server side scripting technology ASP (Active Server Pages) is now often called classic ASP.
ASP 3.0 was the last version of classic ASP.

ASP.NET is NOT ASP

ASP.NET is the next generation ASP, but it's not an upgraded version of ASP.
ASP.NET is an entirely new technology for server-side scripting. It was written from the ground up and is not backward compatible with classic ASP.
You can read more about the differences between ASP and ASP.NET in the next chapter of this tutorial.
ASP.NET is the major part of the Microsoft's .NET Framework.

What is ASP.NET?

ASP.NET is a server side scripting technology that enables scripts (embedded in web pages) to be executed by an Internet server.
  • ASP.NET is a Microsoft Technology
  • ASP stands for Active Server Pages
  • ASP.NET is a program that runs inside IIS
  • IIS (Internet Information Services) is Microsoft's Internet server
  • IIS comes as a free component with Windows servers
  • IIS is also a part of Windows 2000 and XP Professional

What is an ASP.NET File?

  • An ASP.NET file is just the same as an HTML file
  • An ASP.NET file can contain HTML, XML, and scripts
  • Scripts in an ASP.NET file are executed on the server
  • An ASP.NET file has the file extension ".aspx"

How Does ASP.NET Work?

  • When a browser requests an HTML file, the server returns the file
  • When a browser 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
  • Finally, the ASP.NET file is returned to the browser as plain HTML

What is ASP+?

ASP+ is the same as ASP.NET.
ASP+ is just an early name used by Microsoft when they developed ASP.NET.

The Microsoft .NET Framework

The .NET Framework is the infrastructure for the Microsoft .NET platform. 
The .NET Framework is an environment for building, deploying, and running Web applications and Web Services.
Microsoft's first server technology ASP (Active Server Pages), was a powerful and flexible "programming language". But it was too code oriented. It was not an application framework and not an enterprise development tool.
The Microsoft .NET Framework was developed to solve this problem.
.NET Frameworks keywords:
  • Easier and quicker programming
  • Reduced amount of code
  • Declarative programming model
  • Richer server control hierarchy with events
  • Larger class library
  • Better support for development tools
The .NET Framework consists of 3 main parts:
Programming languages:
  • C# (Pronounced C sharp)
  • Visual Basic (VB .NET)
  • J# (Pronounced J sharp)
Server technologies and client technologies:
  • ASP .NET (Active Server Pages)
  • Windows Forms (Windows desktop solutions)
  • Compact Framework (PDA / Mobile solutions)
Development environments:
  • Visual Studio .NET (VS .NET)
  • Visual Web Developer
This tutorial is about ASP.NET.

ASP.NET 2.0

ASP.NET 2.0 improves upon ASP.NET by adding support for several new features.
You can read more about the differences between ASP.NET 2.0 and ASP.NET in the next chapter of this tutorial.

ASP.NET 3.0

ASP.NET 3.0 is not a new version of ASP.NET. It's just the name for a new ASP.NET 2.0 framework library with support for Windows Presentation Foundation, Windows Communication Foundation, Windows Workflow Foundation; and Windows CardSpace.

ASP.NET vs. ASP

ASP.NET has better language support, a large set of new controls, XML-based components, and better user authentication.
ASP.NET provides increased performance by running compiled code.
ASP.NET code is not fully backward compatible with ASP.

New in ASP.NET

  • Better language support
  • Programmable controls
  • Event-driven programming
  • XML-based components
  • User authentication, with accounts and roles
  • Higher scalability
  • Increased performance - Compiled code
  • Easier configuration and deployment
  • Not fully ASP compatible

Language Support

ASP.NET uses ADO.NET.
ASP.NET supports full Visual Basic, not VBScript.
ASP.NET supports C# (C sharp) and C++.
ASP.NET supports JScript.

ASP.NET Controls

ASP.NET contains a large set of HTML controls. Almost all HTML elements on a page can be defined as ASP.NET control objects that can be controlled by scripts.
ASP.NET also contains a new set of object-oriented input controls, like programmable list-boxes and validation controls.
A new data grid control supports sorting, data paging, and everything you can expect from a dataset control.

Event Aware Controls

All ASP.NET objects on a Web page can expose events that can be processed by ASP.NET code.
Load, Click and Change events handled by code makes coding much simpler and much better organized.

ASP.NET Components

ASP.NET components are heavily based on XML. Like the new AD Rotator, that uses XML to store advertisement information and configuration.

User Authentication

ASP.NET supports form-based user authentication, cookie management, and automatic redirecting of unauthorized logins.

User Accounts and Roles

ASP.NET allows user accounts and roles, to give each user (with a given role) access to different server code and executables.

High Scalability

Much has been done with ASP.NET to provide greater scalability.
Server-to-server communication has been greatly enhanced, making it possible to scale an application over several servers. One example of this is the ability to run XML parsers, XSL transformations and even resource hungry session objects on other servers.

Compiled Code

The first request for an ASP.NET page on the server will compile the ASP.NET code and keep a cached copy in memory. The result of this is greatly increased performance.

Easy Configuration

Configuration of ASP.NET is done with plain text files.
Configuration files can be uploaded or changed while the application is running. No need to restart the server. No more metabase or registry puzzle.

Easy Deployment

No more server-restart to deploy or replace compiled code. ASP.NET simply redirects all new requests to the new code.

Compatibility

ASP.NET is not fully compatible with earlier versions of ASP, so most of the old ASP code will need some changes to run under ASP.NET.
To overcome this problem, ASP.NET uses a new file extension ".aspx". This will make ASP.NET applications able to run side by side with standard ASP applications on the same server.

ASP.NET Installing

ASP.NET is easy to install. Just follow the instructions below.

What You Need

If you have a Beta version of ASP.NET installed, we recommend that you completely uninstall it!
Or even better: start with a fresh Windows 2000 or XP installation!

Windows 2000 or XP

If you are serious about developing ASP.NET applications you should install Windows 2000 Professional or Windows XP Professional.
In both cases, install the Internet Information Services (IIS) from the Add/Remove Windows components dialog.

Service Packs and Updates

Before ASP.NET can be installed on your computer, all relevant service packs and security updates must be installed.
The easiest way to do this is to activate your Windows Internet Update. When you access the Windows Update page, you will be instructed to install the latest service packs and all critical security updates. For Windows 2000, make sure you install Service Pack 2. You should also install the latest version of Internet Explorer.
Tip: Read the note about connection speed and download time at the bottom of this page.

Install .NET

From your Windows Update you can now select the Microsoft .NET Framework.
After download, the .NET framework will install itself on your computer - there are no options to select for installation.
You are now ready to develop your first ASP.NET application!

The .NET Software Development Kit

If you have the necessary bandwidth, you might consider downloading the full Microsoft .NET Software Development Kit (SDK).
We fully recommend getting the SDK for learning more about .NET, and for the documentation, samples, and tools included.

Connection Speed and Download Time

If you have a slow Internet connection, you might have problems downloading large files like the Windows 2000 Service Pack 2 and the Microsoft .NET Framework.
If download speed is a problem, our best suggestion is to get the latest files from someone else, from a colleague, from a friend, or from one of the CDs that comes with many popular computer magazines.

ASP.NET - Web Pages

A simple ASP.NET page looks just like an ordinary HTML page.

Hello W3Schools

To start learning ASP.NET, we will construct a very simple HTML page that will display "Hello W3Schools" in an Internet browser like this:

Hello W3Schools!



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