ASP PAGE LIFE CYCLE
Introduction:
The life cycle of an asp.net page can be understandable easily if you have a knowledge of some keywords like viewstate, postback and events in asp.net .
Description:
PreInit -
* In preinit you can check weather the page is loaded first time or not using IsPostBack property.
* On the first time load page you can create control with values.
* You can set master page and theme dynamically.
* If the page is postback, you can set control property value to be overwritten.
* The values have not been yet restored from viewstate.
Init -
* In the
* This event is used to initialize control properties.
InitComplete -
* In the InitComplete event the viewstate property checking will be done and that changes will be persisted until next postback.
PreLoad -
* This will process the data on postback event with the request.
Load -
* In this process the initial Page controls or objects calls the OnLoad method and that method with any controls or objects comes next.
ControlEvents -
* This events occurs after page loads like onclick in button, textchanged in textbox, onchange in dropdownlist etc.
In case of the postback,
if the page contains validator controls , the page.isvalid property and the validation of the control takes place before the firing of individual events.
Load Complete -
* This session occurs after the event handling page.
* This will complete all controls and their methos events.
Pre Render -
* This method is used to make final changes to the controls on the page like assigning the
PreRenderComplete -
* This event is raised after all the final id values are set in prerender completes.
SaveStateComplete -
* This will occur after control state and view state saved.
RenderComplete -
* This method writes the controls values or markup to the browser.
Unload -
* This event is raised for each control and then for the page.
* This will do the final clean up work and close dataconnection etc.,
If any clarification or need changes please comment.
Thank you!
Introduction:
The life cycle of an asp.net page can be understandable easily if you have a knowledge of some keywords like viewstate, postback and events in asp.net .
Description:
PreInit -
* In preinit you can check weather the page is loaded first time or not using IsPostBack property.
* On the first time load page you can create control with values.
* You can set master page and theme dynamically.
* If the page is postback, you can set control property value to be overwritten.
* The values have not been yet restored from viewstate.
Init -
* In the
Init event of the individual controls occurs first, later the Init event of the Page takes place.* This event is used to initialize control properties.
InitComplete -
* In the InitComplete event the viewstate property checking will be done and that changes will be persisted until next postback.
PreLoad -
* This will process the data on postback event with the request.
Load -
* In this process the initial Page controls or objects calls the OnLoad method and that method with any controls or objects comes next.
ControlEvents -
* This events occurs after page loads like onclick in button, textchanged in textbox, onchange in dropdownlist etc.
In case of the postback,
if the page contains validator controls , the page.isvalid property and the validation of the control takes place before the firing of individual events.
Load Complete -
* This session occurs after the event handling page.
* This will complete all controls and their methos events.
Pre Render -
* This method is used to make final changes to the controls on the page like assigning the
DataSourceId and calling the DataBind method.PreRenderComplete -
* This event is raised after all the final id values are set in prerender completes.
SaveStateComplete -
* This will occur after control state and view state saved.
RenderComplete -
* This method writes the controls values or markup to the browser.
Unload -
* This event is raised for each control and then for the page.
* This will do the final clean up work and close dataconnection etc.,
If any clarification or need changes please comment.
Thank you!
