The ASP.NET Page Lifecycle – A Basic Approach

The page Requst occurs before  Asp.net Page Life cycle Begins .
      
Client Request are passes through the worker processes and http pipeline  to Server .

Asp.net page life cycle Begins .

• S – Start
• I – Initialize
• L – Load
• V – Validate
• E – Event Handling
• R – Render
• Unload

SILVER U
  
START :

                  Page Properties Request,Response,IspostBack and UICULTURE are set .

INITIALIZE :
                
                      Themes are applied and Uniqueid's are  Generated  and set for controls .
               
LOAD :

               if the request is postback  request  then it loads data from  viewstate and control state .

          
VALIDATE :

                      Updates  isVALID PROPERTY .

                     Validates the pages control .

                   Page.Validate();

                 if (Page.IsValid == true)
               lblOutput.Text = "Page is Valid!";
              else
             lblOutput.Text = "Some required fields are empty.";

EVENTS :

                 This will be only Fire when Request is an Postback .
                 
                
RENDER :
            
                 BEDFORE RENDERING all viewstate data has been saved .
               
            Render method  for all controls called  and Write  the output  on outputstream.

unload :

               this IS THE LAST EVENT  OF ASP.NET LIFE CYCLE.

            THIS ENSURES REQUEST AND REPONSE  HAS BEEN SENT TO NULL .



                          

                              

                      
                             

          
       


                     
                  

                       
                  
       






http://www.codeproject.com/Articles/20659/The-ASP-NET-Page-Lifecycle-A-Basic-Approach