ASP.NET.in.a.Nutshell.Second.Edition [Electronic resources] نسخه متنی

13.5 Events Reference

Sub Application_OnStart( )
''Event handler logic
End Sub

Fired when the Application is created. The
event handler for this event should be defined in the

global.asax application file.

Parameters

None.

Example

The example writes an entry to both the Application Event log and the
IIS log for the application to indicate that the Start event has
fired:

<Script language="VB" runat="server">
Sub Application_OnStart( )
Dim EventLog1 As New System.Diagnostics.EventLog ("Application", _
".", "mySource")
EventLog1.WriteEntry("Application_OnStart fired!")
Context.Response.AppendToLog("Application_OnStart fired!")
End Sub
</script>

There is one issue with the code above. Security in the released
version of the .NET framework has been tightened, so writing to the
event log will not work by default in an ASP.NET application.

Notes

The Start event is useful for performing initialization tasks when
the application is initialized. You can initialize Application
variables that are mostly static.

Sub Application_OnEnd( )
''Event handler logic
End Sub

Fired when the application is torn down,
either when the web server is stopped or when the

global.asax file is modified. The event handler
for this event should be defined in the

global.asax application file.

Parameters

None.

Example

The example below writes an entry to the Application Event log to
indicate that the End event has fired:

<Script language="VB" runat="server">
Sub Application_OnEnd( )
Dim EventLog1 As New System.Diagnostics.EventLog ("Application", _
".", "mySource")
EventLog1.WriteEntry("Application_OnEnd fired!")
End Sub
</script>

Notes

The End event is useful for performing cleanup tasks when the
Application ends, either because the web service stops or the

global.asax file is changed.