ASP.NET FRAMEWORK WITH C#

By Er. Pranshu Katiyar (Software Engineer) -

Life Cycle of ASP.NET Applications:

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:

o   An object of the class ApplicationManager is created.

o   An object of the class HostingEnvironment is created to provide information regarding the resources.

o   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.

ASP.NET Page Life Cycle :

When a page is requested, it is loaded into the server memory, processed, and sent to the browser. Then it is unloaded from the memory. At each of these steps, methods and events are available, which could be overridden according to the need of the application. In other words, you can write your own code to override the default code. The page life cycle phases are:

  • Initialization
  • Instantiation of the controls on the page
  • Restoration and maintenance of the state
  • Execution of the event handler codes
  • Page rendering

Ø  An ASP.NET page is also a server side file saved with the .aspx extension. It is modular in nature and can be divided into the following core sections:

  • Page Directives
  • Code Section
  • Page Layout

v  The page layout provides the interface of the page. It contains the server controls, text, inline JavaScript, and HTML tags. The following code snippet provides a sample ASP.NET page explaining Page directives, code section and page layout written in C#:

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