Tracking page events in ASP.NET Page

By Mohammed Derbashi, 2 Oct 2011

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This is a simple way to track the page events in ASP.NET, I used it to follow the sequence of raising events, also it can be used as a debugging methodology.

First when you create a new asp.net page add this code:

Dim SeqNo As Integer = 0
 
    Private Sub Page_AbortTransaction(sender As Object, e As System.EventArgs) Handles Me.AbortTransaction
        SeqNo += 1
        Debug.Print(SeqNo.ToString & " - AbortTransaction")
    End Sub
 
    Private Sub Page_CommitTransaction(sender As Object, e As System.EventArgs) Handles Me.CommitTransaction
        SeqNo += 1
        Debug.Print(SeqNo.ToString & " - CommitTransaction")
    End Sub
 
    Private Sub Page_DataBinding(sender As Object, e As System.EventArgs) Handles Me.DataBinding
        SeqNo += 1
        Debug.Print(SeqNo.ToString & " -  DataBinding")
    End Sub
 
    Private Sub Page_Disposed(sender As Object, e As System.EventArgs) Handles Me.Disposed
        SeqNo += 1
        Debug.Print(SeqNo.ToString & " -  Disposed")
    End Sub
 
    Private Sub Page_Error(sender As Object, e As System.EventArgs) Handles Me.Error
        SeqNo += 1
        Debug.Print(SeqNo.ToString & " -  Error")
    End Sub
 
    Private Sub Page_Init(sender As Object, e As System.EventArgs) Handles Me.Init
        SeqNo += 1
        Debug.Print(SeqNo.ToString & " -  Init")
    End Sub
 
    Private Sub Page_InitComplete(sender As Object, e As System.EventArgs) Handles Me.InitComplete
        SeqNo += 1
        Debug.Print(SeqNo.ToString & " -  InitComplete")
    End Sub
 
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        SeqNo += 1
        Debug.Print(SeqNo.ToString & " -  Load")
    End Sub
 
    Private Sub Page_LoadComplete(sender As Object, e As System.EventArgs) Handles Me.LoadComplete
        SeqNo += 1
        Debug.Print(SeqNo.ToString & " -  LoadComplete")
    End Sub
 
    Private Sub Page_PreInit(sender As Object, e As System.EventArgs) Handles Me.PreInit
        SeqNo += 1
        Debug.Print(SeqNo.ToString & " -  PreInit")
    End Sub
 
    Private Sub Page_PreLoad(sender As Object, e As System.EventArgs) Handles Me.PreLoad
        SeqNo += 1
        Debug.Print(SeqNo.ToString & " -  PreLoad")
    End Sub
 
    Private Sub Page_PreRender(sender As Object, e As System.EventArgs) Handles Me.PreRender
        SeqNo += 1
        Debug.Print(SeqNo.ToString & " -  PreRender")
    End Sub
 
    Private Sub Page_PreRenderComplete(sender As Object, e As System.EventArgs) Handles Me.PreRenderComplete
        SeqNo += 1
        Debug.Print(SeqNo.ToString & " -  PreRenderComplete")
    End Sub
 
    Private Sub Page_SaveStateComplete(sender As Object, e As System.EventArgs) Handles Me.SaveStateComplete
        SeqNo += 1
        Debug.Print(SeqNo.ToString & " -  SaveStateComplete")
    End Sub
 
    Private Sub Page_Unload(sender As Object, e As System.EventArgs) Handles Me.Unload
        SeqNo += 1
        Debug.Print(SeqNo.ToString & " -  Unload")
    End Sub

Run the Web application in Debug mode (by selecting Debug-> Start Debugging OR press F5).

After the page is viewed completely on the browser, check the output window in Visual Studio (if it was not opened select View -> Output OR press Ctrl+Alt+O)