Dot net basics for beginners

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Dot net basics for beginners
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• INDEX
• What is ASP.NET?
• What is an event in .net?
• Event Handling With Controls
• life cycle events page for .Net

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(No Transcript)
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What is ASP.NET? ASP.NET is a web development
Programming language that provides a programming
model, a comprehensive software infrastructure
and various services to build robust web
applications for PC and 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 the Microsoft.
Net Platform. ASP.NET applications are compiled
codes written using the extensible and reusable
components or objects in.Net framework. These
codes can be the entire hierarchy of classes in.
Use the. Net framework.
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What is an event in .net? An event is an action
or event such as a mouse click, key press, mouse
movement, or system-generated notification. A
process communicates through events. For example,
interrupts are system-generated events. When
events occur, the application should be able to
respond and manage them. Events in ASP.NET on the
client machine and handled on the server machine.
For example, a user clicks a button in the
browser. A click event is triggered. The server
has a subroutine that describes what to do when
the event is dispatched. If the event message is
transmitted to the server, it checks whether the
Click event has an associated event handler. If
this is the case, the event handler is executed.
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Event Handling With Controls All ASP.NET controls
are implemented as classes, and you have events
that are triggered when a user performs a
specific action.There are built-in attributes and
event handlers for handling events. Event handler
is encoded to respond to an event and take
appropriate action. By default, Visual Studio
creates an event handler by containing a Handles
clause for the sub procedure. This clause names
the control and the event that handles the
procedure.
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The following are the life cycle events page for
.Net PreInit-PreInit is the first event in the
page life cycle. It checks the property for
determines whether the page is a postback. It is
the themes and master pages, creates dynamic
controls, and gets and sets profile property
values. Init-init event initializes the control
property and creates the control tree.
InitComplete-initcomplete event allows you to
track View Status. All controls turn on view
state tracking. LoadViewState-LoadViewState event
allows you to load view status information into
the controls
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LoadPostData - at this stage the contents of all
input fields are processed with the ltformgt
tag. PreLoad-PreLoad occurs before the post back
data is loaded in the controls. This event can be
handled by Page_PreLoad handler. Load - the Load
event is triggered first for the page and then
recursively for all child controls. The controls
in the control tree are created. This event can
be handled by overloading The OnLoad method or
creating a Page_Load handler. Discharge-the
discharge phase is the final phase of the side
life cycle. It dispatches the UnLoad event for
all controls recursively and last for the page
itself. The final cleanup is done and all
resources and references, such as database
connections, are released. This event can be
handled by Page_UnLoad handler.
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