13.5 Events Reference

Start

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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.

End

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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.