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ASP.NET – Introduction

ASP.NET is a web development platform, which provides a programming model, a comprehensive software infrastructure and various services required to build up robust web applications for PC, as well as mobile devices.

ASP.NET works on top of the HTTP protocol, and uses the HTTP commands and policies to set a browser-to-server bilateral communication and cooperation.

ASP.NET is a part of Microsoft .Net platform. ASP.NET applications are compiled codes, written using the extensible and reusable components or objects present in .Net framework. These codes can use the entire hierarchy of classes in .Net framework.

The ASP.NET application codes can be written in any of the following languages:

  • C#
  • Visual Basic.Net
  • Jscript
  • J#

ASP.NET is used to produce interactive, data-driven web applications over the internet. It consists of a large number of controls such as text boxes, buttons, and labels for assembling, configuring, and manipulating code to create HTML pages.

ASP.NET – Life Cycle

ASP.NET Application Life Cycle

The application life cycle has the following stages:

  • User makes a request for accessing application resource, a page. Browser sends this request to the web server.
  • A unified pipeline receives the first request and the following events take place:
    • An object of the class ApplicationManager is created.
    • An object of the class HostingEnvironment is created to provide information regarding the resources.
    • Top level items in the application are compiled.
  • Response objects are created. The application objects such as HttpContext, HttpRequest and HttpResponse are created and initialized.
  • An instance of the HttpApplication object is created and assigned to the request.
  • The request is processed by the HttpApplication class. Different events are raised by this class for processing the request.

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