INTERVIEW QUESTIONS MICROSOFT ASP.NET DETAILS

Question: Life cycle of ASP?

Answer: Life Cycle of Asp.Net

Init
PageLoad
Pre Render
Page UnLoad

Life Cycle of Asp.Net

Init
PageLoad
Pre Render
Page UnLoad

Source: CoolInterview.com

Page Int
Page Load
Event Click
Page Prerender
Page Unload Source: CoolInterview.com

page preinit
page init
page init complete
page preload
page load
page load complete
page prerender
page render
page save state complete
page unload Source: CoolInterview.com

Page Init
Page Load
Validation
Events
Pre Render
Page Unload Source: CoolInterview.com

There are 3 phase in Page life cycle(Page Construction)

1. Initilisation
2. Event Handler Execution
3. Rendering

1. Initilisation:
3 main events happen in this Phase:


PreInit
Init
InitComplete

2. Enent Handler execute
Preload
load
Controls events (Changed events, PostBackEvent and validation events are fired)
loadcomplete

3. Rendering

PreRender (the databind method is called)
Render(Each control calls its Render method and outputs HTML)

SaveState(happens after the ViewState for the page has been created and set)

Unload(After the markup is created for the whole page and sent back to the http application each object that was instantiated is unloaded and is available for garbage collection) Source: CoolInterview.com

Page request
Start
Page initialization
Load
Validation
Postback event handling
Rendering
Unload Source: CoolInterview.com

Page Int
Page Load
Event Click
Page Prerender
Page Unload Source: CoolInterview.com

page_preinit
page_init
page_preload
page_load
page_prerender
page_render
page_unload Source: CoolInterview.com

ASP.Net Page Life Cycle - Stage Description:

Page request:
The page request occurs before the page life cycle begins. When the page is requested by a user, ASP.NET determines whether the page needs to be parsed and compiled (therefore beginning the life of a page), or whether a cached version of the page can be sent in response without running the page.

Start:
In the start step, page properties such as Request and Response are set. At this stage, the page also determines whether the request is a postback or a new request and sets the IsPostBack property. Additionally, during the start step, the page's UICulture property is set.

Page initialization:
During page initialization, controls on the page are available and each control's UniqueID property is set. Any themes are also applied to the page. If the current request is a postback, the postback data has not yet been loaded and control property values have not been restored to the values from view state.

Load:
During load, if the current request is a postback, control properties are loaded with information recovered from view state and control state.

Validation:
During validation, the Validate method of all validator controls is called, which sets the IsValid property of individual validator controls and of the page.

Postback event handling:
If the request is a postback, any event handlers are called.

Rendering:
Before rendering, view state is saved for the page and all controls. During the rendering phase, the page calls the Render method for each control, providing a text writer that writes its output to the OutputStream of the page's Response property.

Unload:
Unload is called after the page has been fully rendered, sent to the client, and is ready to be discarded. At this point, page properties such as Response and Request are unloaded and any cleanup is performed.
Source: CoolInterview.com

ASP.Net Page Life Cycle - Events:

PreInit
Init
InitComplete
PreLoad
Load
Control events
LoadComplete
PreRender
SaveStateComplete
Render
Unload Source: CoolInterview.com

Page_preinit()
Page_init()
Page_Load()
Page_Prerender()
Page_Unload() Source: CoolInterview.com

Page PreInit
page Init
Page Load
page PreRender
Page Render
page UnLoad Source: CoolInterview.com

Init
Load
Cached Post Back Event
Pre-Render
UnLoad Source: CoolInterview.com

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