What is ASP.Net?
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.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
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
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
