What is ASP.NET
Amod
necessary services for programmers to develop web-based applications.
Because ASP.NET is part of the .NET Framework, programmers can use the
managed Common Language Runtime (CLR) environment, type safety,
inheritance, etc. to create web-based applications. You can develop
your ASP.NET web-based applications in any .NET-compliant language,
such as Visual Basic, Visual C#, or JScript.NET. ASP.NET code is
compiled rather than interpreted, which permits early binding, strong
typing, and just-in-time (JIT) compiling to native code.
In ASP.NET, deployment is as simple as copying a component assembly to
its desired location. ASP.NET configuration settings are stored in
XML-based files, which are human-readable and -writable. ASP.NET
automatically applies new configuration settings to web resources
whenever it finds any changes to configuration files, without rebooting
the server.
There are two core programming models when developing an ASP.NET
application:
Web forms
Web Services
Web forms allow you to develop programmable forms-based web pages. A
web forms page consists of two parts:
Visual elements: HTML elements and web forms controls.
User interface logic: Code that contains logic for interacting with the
visual elements.
In ASP.NET, business logic code (functional code) is separated from
presentation code (HTML code). The visual elements are created in an
.aspx file. The code is in a separate class file, called the
code-behind class file (.aspx.vb or .aspx.cs), which consists of event
handlers, initialization code, and other supporting code for the user
interface in the aspx file.
Web services provide the capability to exchange messages in a loosely
coupled environment using standard data formats and protocols such as
HTTP, XML, and SOAP. A web service is nothing but a programmable
application component that provides some serviceable, useful
functionality such as application logic, and is available to any number
of potentially incongruent systems through the use of Internet
standards such as XML and HTTP.
ASP.NET provides solutions to some of the drawbacks that exist in ASP
and offers a lot of additional benefits such as performance,
scalability, deployment, security, output cache control, and web
services infrastructure. Both ASP.NET and ASP run agreeably on an
Internet Information Services (IIS) web server without interruption.
Newly created ASP.NET pages with the file extension .aspx won't corrupt
any existing ASP application. Files with an .aspx extension are
processed by the ASP.NET runtime and files with an .asp extension are
processed as usual by the ASP engine. ASP.NET offers total syntax and
processing compatibility with ASP applications. The two systems have
completely separate processing engines.