What is PreInit ,Init and Unload method in ASP.NET??

Priyanka Singh

What will exactly happens in PreInit,Init and Unlod Method of ASP.NET Life cycle..Please Explain me with some example.Thank you in advance.

4 Replies

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Rajeev Kumar3y ago
the Page_Init event fires only the first time the page is loaded. When you use a web form and post back to this page again, the Page_Init event doesn't fire.

Init event initializes the control property and the control tree is built.

The UnLoad phase is the last phase of the page life cycle.

It raises the UnLoad event for all controls recursively and lastly for the page itself.
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Arshad Ali6y ago
Please visit the below link is a very helpful video for the ASP.Net Page Life cycle
https://www.youtube.com/watch?v=XiPo1-N9KVQ&ab_channel=kudvenkat
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Arshad Ali6y ago
Please visit the below link is a very helpful video for the ASP.Net Page Life cycle
https://www.youtube.com/watch?v=XiPo1-N9KVQ&ab_channel=kudvenkat
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Mageshwaran R6y ago
Hi Priyanka,

PreInit:
PreInit is the first event in page life cycle. It checks the IsPostBack property and determines whether the page is a postback.
It sets the themes and master pages, creates dynamic controls, and gets and sets profile property values.
This event can be handled by overloading the OnPreInit method or creating a Page_PreInit handler.
Init:
Init event initializes the control property and the control tree is built.
This event can be handled by overloading the OnInit method or creating a Page_Init handler.

UnLoad:
The UnLoad phase is the last phase of the page life cycle.
It raises the UnLoad event for all controls recursively and lastly for the page itself.
Final cleanup is done and all resources and references, such as database connections, are freed.
This event can be handled by modifying the OnUnLoad method or creating a Page_UnLoad handler.

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