The document discusses the ASP.NET page lifecycle. It begins with an introduction explaining that a requested web page goes through a series of steps on the server before being returned to the browser. It then outlines the main stages of the lifecycle including initialization, load, processing of events, rendering, and unload. Finally, it provides more details on specific events within each stage such as Page_Init and Load and the order in which they are executed.

2. Disclaimer: This presentation is prepared by trainees of
baabtra as a part of mentoring program. This is not official
document of baabtra –Mentoring Partner
Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt .
Ltd

3. Week Target Achieved
1 30 22
2 30 23
3 30 25
Typing Speed

4. Jobs Applied
Week Company Designation Applied Date Current Status
1
2
3

5. ASP .Net Page Life Cycle
MuhammedAjmal
ajuik2008@gmail.com
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9745020951

6. Overview
• Introduction
• General stages
• Events

7. Introduction
When a web page is requested to the web server, it
goes through a series of sequence of steps before it is
returned back to the web browser.
1. Web Application creates an instance of the requested web
form.
2. Processes the events of the web form.
3. Generates the HTML, and sends the HTML back to the
requested client.
4. The web form gets destroyed and removed from the
memory.

8. Genera Steps
• S = Start
• I = Initialization
• L = Load
• V = Validate
• E = Event Handlers
• R = Render

9. Postback
• A Post Back is any request for a page that is not the
first request.
– Check post back using isPostback()
View state
• The view state store the page specific information when a page
posted back to the server.

10. Page life cycle Events

11. PreInit
• Raised after the start stage is complete and before the
initialization stage begins
– set isPostBack property
– Possible to change or set Master page, themes
– Creates or recreates dynamic controls

12. Page_PreInit

13. Page_Init
• Raised after all controls have been initialized and any
skin settings have been applied.
• The Page_Init event fires only the first time the page
is loaded.
Init Complete
•View state functionality is turned on for server control

14. PreLoad
•PreLoad executes after InitComplete method.
• page has loaded values from view state.

15. PreLoad

16. Load()
• This event loads individual controls.
• We can create the connection initialization for any kind of
external source like database connection
• We can also set the control properties
• We can created our own Load method

17. Control events
• Use these events to handle specific control events,
• If this is an postback request , Corresponding events will
triggered.

18. • Control events

19. LoadComplete
• This event can be used when all the event processing has
been done in the page.

20. PreRender
• Each control of the page has a PreRender event which is
being invoked.
• DataBind method for all control has also been called
• If we want to change any thing to any control this is the
last event where we can do because after the pageRender
starts

21. • SaveViewState
• ViewState Monitoring is turned off as here all the
ViewState Data need to be saved.
• View State data saved in hidden filed called
_VIEWSTATE

22. •RenderPages
• calls the Render method for each and every
control.
•Text writer that writes the output to the as output
stream
•Output steam set to the page's Response property.

23. Unload
• This is the last event of asp.net page life cycle
• This ensure the Request and Response has been set to
null.
• This is called only after the content of the page fully
rendered and response sent to client

24. Order of execution

26. Thank you

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