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ASP .Net Page Life cycle
Posted By:
rakesh
On:
6/7/2011 10:26:32 PM
in:
Articles
Category:
ASP.NET
Hits:
6073
Intoduction to ASP .Net Page Life cycle
Previous Article:
ASP .Net Authentication Levels
Next Article:
Difference between User Control and Custom Control
1.
OnInit
(Init) Initializes each child control of the current page.
2.
LoadControlState
: Loads the ControlState of the control. To use this
method the control must call the Page.RegisterRequiresControlState method in
the OnInit method of the control.
3.
LoadViewState
: Loads the ViewState of the control.
4.
LoadPostData
: Is defined on interface IPostBackDataHandler. Controls that
implement this interface use this method to retrieve the incoming form data and
update the control s properties accordingly.
5.
Load (OnLoad)
: Allows actions that are common to every request to be
placed here. Note that the control is stable at this time; it has been
initialized and its state has been reconstructed.
6.
RaisePostDataChangedEvent:
Is defined on the interface IPostBackData-Handler.
Controls that implement this interface use this event to raise change events in
response to the Postback data changing between the current Postback and the
previous Postback. For example if a TextBox has a TextChanged event and
AutoPostback is turned off clicking a button causes the Text-Changed event to
execute in this stage before handling the click event of the button which is
raised in the next stage.
7.
RaisePostbackEvent
: Handles the client-side event that caused the Postback
to occur.
8.
PreRender (OnPreRender)
: Allows last-minute changes to the control. This
event takes place after all regular Post-back events have taken place. This
event takes place before saving ViewState so any changes made here are saved.
9.
SaveControlState
: Saves the current control state to ViewState. After this
stage any changes to the control state are lost. To use this method the
control must call the Page.RegisterRequiresControlState method in the OnInit
method of the control.
10.
SaveViewState
: Saves the current data state of the control to ViewState.
After this stage any changes to the control data are lost.
11.
Render
: Generates the client-side HTML Dynamic Hypertext Markup Language
(DHTML) and script that are necessary to properly display this control at the
browser. In this stage any changes to the control are not persisted into
ViewState.
12.
Dispose
: Accepts cleanup code. Releases any unman-aged resources in this
stage. Unmanaged resources are resources that are not handled by the .NET common
language runtime such as file handles and database connections.
13.
UnLoad
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User Profile
Rakesh Sinha
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New Delhi
,
India
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