What will do prerender event in .net

It is the event before the page is actually displayed on the screen. Or more technical, it happens BEFORE the render method gets called which creates the HTML code using the HtmlWriter. What's intersting is, that the viewstate isn' t updated and stored yet. Viewstate is the state of the webpage. If you need to change/update something which has to go into the viewstate, you should do this in the prerender event handler. If you do this after the render event, it will not be written to the viewstate, since the viewstate gets written just after the render event occurred.

Does this makes sense?

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Peter

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Quomon Admin

For every request to .aspx page the ASP.NET work processor
will create a new instance of the corresponding page class
object, once the request is executed the object of page
class is destroyed automatically, the page object life cycle
is controlled by its page life cycle events those are:
1 page_Init
2 page_Load
3 page_Prerender
4 Page_Unload
Page_Prerender: After page executed and before rendering the
output values to the the requested browser this event executes

It is the event before the page is actually displayed on the screen. Or more technical, it happens BEFORE the render method gets called which creates the HTML code using the HtmlWriter. What's intersting is, that the viewstate isn' t updated and stored yet.

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Pre-Render is a part of page life circle. after that page loaded the event handling process is executed. when it is completed, the next step is data binding. the pretender is executed just before the data binding that means when pre-render is executed the data binding process is started.

Enable Trace=true in your page directive- to see all the page life cycle event.
Pre-Render event is just before the page send to the final output (html). Here you can make change the properties of the control because after that it will be saved to the viewstate