I was asked to explain the ASP.NET page life cycle in an interview some time back. I did explain it to him, but he was not satisfied with my answer. Could someone explain the life cycle to me please?
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3 Answers
There are 10 events in ASP.NET page life cycle, and the sequence is:
- Init
- Load view state
- Post back data
- Load
- Validate
- Events
- Pre-render
- Save view state
- Render
- Unload
Below is a pictorial view of ASP.NET Page life cycle with what kind of code is expected in that event. I suggest you read this article I wrote on the ASP.NET Page life cycle, which explains each of the 10 events in detail and when to use them.
Image source: my own article at https://www.c-sharpcorner.com/uploadfile/shivprasadk/Asp-Net-application-and-page-life-cycle/ from 19 April 2010
1 Comment
JoshYates1980
Nice visual. I can show this to management to help them understand what I'm trying to explain about multiple trips to the database due to spaghetti code.
This acronym might help you to remember the ASP.NET life cycle stages which I wrote about in the below blog post.
R-SIL-VP-RU
- Request
- Start
- Initialization
- Load
- Validation
- Post back handling
- Rendering
- Unload
From my blog: Understand ASP.NET Page life cycle and remember stages in easy way
18 May 2014
2 Comments
TylerH
It's important to provide explicit disclosure of any affiliation to avoid your posts being flagged as spam. I noticed all of your answers on SO were posted with a link to the same blog (in fact, the entire content of each answer relies heavily on said link), where each specific link was to a specific blog article posted less than a single day before each of your respective answers were posted.
TylerH
Also, this acronym is not at all easy to commit to memory. Perhaps a mnemonic like "RSVP, Russia" for "Répondez S'il Vou Plaît, Russia" would be easier?
Partial Class _Default Inherits System.Web.UI.Page Dim str As String Protected Sub Page_Disposed(sender As Object, e As System.EventArgs) Handles Me.Disposed str += "PAGE DISPOSED" & "<br />" End Sub Protected Sub Page_Error(sender As Object, e As System.EventArgs) Handles Me.Error str += "PAGE ERROR " & "<br />" End Sub Protected Sub Page_Init(sender As Object, e As System.EventArgs) Handles Me.Init str += "PAGE INIT " & "<br />" End Sub Protected Sub Page_InitComplete(sender As Object, e As System.EventArgs) Handles Me.InitComplete str += "INIT Complte " & "<br />" End Sub Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load str += "PAGE LOAD " & "<br />" End Sub Protected Sub Page_LoadComplete(sender As Object, e As System.EventArgs) Handles Me.LoadComplete str += "PAGE LOAD Complete " & "<br />" End Sub Protected Sub Page_PreInit(sender As Object, e As System.EventArgs) Handles Me.PreInit str = "" str += "PAGE PRE INIT" & "<br />" End Sub Protected Sub Page_PreLoad(sender As Object, e As System.EventArgs) Handles Me.PreLoad str += "PAGE PRE LOAD " & "<br />" End Sub Protected Sub Page_PreRender(sender As Object, e As System.EventArgs) Handles Me.PreRender str += "PAGE PRE RENDER " & "<br />" End Sub Protected Sub Page_PreRenderComplete(sender As Object, e As System.EventArgs) Handles Me.PreRenderComplete str += "PAGE PRE RENDER COMPLETE " & "<br />" End Sub Protected Sub Page_SaveStateComplete(sender As Object, e As System.EventArgs) Handles Me.SaveStateComplete str += "PAGE SAVE STATE COMPLTE " & "<br />" lbl.Text = str End Sub Protected Sub Page_Unload(sender As Object, e As System.EventArgs) Handles Me.Unload 'Response.Write("PAGE UN LOAD\n") End Sub End Class 
