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Session Object
Session_OnStart Event
   Syntax:
   Parameters:
   Remarks:
  Examples:
Session_OnEnd Event
   Syntax:
   Parameters:
   Remarks:
  Examples:

Session Object

One of the key functions of Session Object is the application control on the server.

Session_OnStart Event

Session_OnStart Event occurs on the start of a Session when a new Session is created by the server.

Syntax:

<SCRIPT LANGUAGE=ScriptLanguage RUNAT=Server>
Sub Session_OnStart
    ...Script...
End Sub
</SCRIPT>

 Or in Global.asa. Imply

<SCRIPT LANGUAGE=ScriptLanguage RUNAT=Server>
Sub Session_OnStart
    ...Scripts...
End Sub
</SCRIPT>

Parameters:

ScriptLanguage

The parameter "ScriptLanguage" is used to specify the scripting language used in writing the event script.

Script

The parameter "Script" is the program written by the scripting language for the script interpreter of the Web Server.

Remarks:

The scipting language can be any supported language, such as VBScript or JScript. When more than one event using the same scripting language, all event sub-rountine can be combined under a single set of <SCRIPT> tags.

The script will be processed before executing the requested page. Variables with session scrope should be set with the Session_OnStart so that these variables can be accessed when opening any pages.

In the Session_OnStart script, all the Application Object, Objectcontext Object, Request Object, Response Object, Server Object and Session Object built-in objects are available and can be referenced the Session_Onstart event script.

When Response.Rediret or Response.End methods is called in the Session_OnStart event, the  server stops processing the script in both the Global.asa file and in the ASP file. However the declared Session objects can still be available.

 By making use of the available session objects, scipts in the Session_OnStart event can be used to control the opening an specifed page by an user through calling the Response.Redirect method.

But when using SessionID cookie to identify an user, the browser should be enabled to use cookies.

Examples:

  • Use Session_OnStart to specify page start

    ASP script command:

    <SCRIPT LANGUAGE=ScriptLanguage RUNAT=Server>
    Sub Session_OnStart
        Session("PageStart") = 1
    End Sub
    </SCRIPT>

Session_OnEnd Event

Session_OnEnd Event occurs on the end of a Session when the Session is either abandoned or times out.

Syntax:

<SCRIPT LANGUAGE=ScriptLanguage RUNAT=Server>
Sub Session_OnEnd
    ...ScriptLanguage...
End Sub
</SCRIPT>

 Or in Global.asa. Imply

<SCRIPT LANGUAGE=ScriptLanguage RUNAT=Server>
Sub Session_OnEnd
    ...Scripts...
End Sub
</SCRIPT>

Parameters:

ScriptLanguage

The parameter "ScriptLanguage" is used to specify the scripting language used in writing the event script.

Script

The parameter "Script" is the program written by the scripting language for the script interpreter of the Web Server.

Remarks:

The scipting language can be any supported language, such as VBScript or JScript. When more than one event using the same scripting language, all event sub-rountine can be combined under a single set of <SCRIPT> tags.

In the Session_OnEnd script, only the Application Object, Server Object, and Session Object of built-in objects are available, however the Server.MapPath method is not available..

And by default, Session_OnEnd runs as the Anonymous User, as defined for the application. If there isn't an Anonymous user, or the Logon for the Anonymous user fails, the OnEnd function will not be called, and an event will be logged.

Examples:

  • Use Session_OnEnd to specify page end

    ASP script command:

    <SCRIPT LANGUAGE=ScriptLanguage RUNAT=Server>
    Sub Session_OnStart
        Session("PageStart") = 1
    End Sub
    Sub Session_OnEnd
        Session("PageStart") = 0
    End Sub
    </SCRIPT>


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ID: 120200048 Last Updated: 2/13/2012 Revision: 0 Ref:

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References

  1. Active Server Pages,  , http://msdn.microsoft.com/en-us/library/aa286483.aspx
  2. ASP Overview,  , http://msdn.microsoft.com/en-us/library/ms524929%28v=vs.90%29.aspx
  3. ASP Best Practices,  , http://technet.microsoft.com/en-us/library/cc939157.aspx
  4. ASP Built-in Objects,  , http://msdn.microsoft.com/en-us/library/ie/ms524716(v=vs.90).aspx
  5. Response Object,  , http://msdn.microsoft.com/en-us/library/ms525405(v=vs.90).aspx
  6. Request Object,  , http://msdn.microsoft.com/en-us/library/ms524948(v=vs.90).aspx
  7. Server Object (IIS),  , http://msdn.microsoft.com/en-us/library/ms525541(v=vs.90).aspx
  8. Application Object (IIS),  , http://msdn.microsoft.com/en-us/library/ms525360(v=vs.90).aspx
  9. Session Object (IIS),  , http://msdn.microsoft.com/en-us/library/ms524319(8v=vs.90).aspx
  10. ASPError Object,  , http://msdn.microsoft.com/en-us/library/ms524942(v=vs.90).aspx
  11. ObjectContext Object (IIS),  , http://msdn.microsoft.com/en-us/library/ms525667(v=vs.90).aspx
  12. Debugging Global.asa Files,  , http://msdn.microsoft.com/en-us/library/aa291249(v=vs.71).aspx
  13. How to: Debug Global.asa files,  , http://msdn.microsoft.com/en-us/library/ms241868(v=vs.80).aspx
  14. Calling COM Components from ASP Pages,  , http://msdn.microsoft.com/en-us/library/ms524620(v=VS.90).aspx
  15. IIS ASP Scripting Reference,  , http://msdn.microsoft.com/en-us/library/ms524664(v=vs.90).aspx
  16. ASP Keywords,  , http://msdn.microsoft.com/en-us/library/ms524672(v=vs.90).aspx
  17. Creating Simple ASP Pages,  , http://msdn.microsoft.com/en-us/library/ms524741(v=vs.90).aspx
  18. Including Files in ASP Applications,  , http://msdn.microsoft.com/en-us/library/ms524876(v=vs.90).aspx
  19. ASP Overview,  , http://msdn.microsoft.com/en-us/library/ms524929(v=vs.90).aspx
  20. FileSystemObject Object,  , http://msdn.microsoft.com/en-us/library/z9ty6h50(v=vs.84).aspx
  21. http://msdn.microsoft.com/en-us/library/windows/desktop/ms675944(v=vs.85).aspx,  , ADO Object Model
  22. ADO Fundamentals,  , http://msdn.microsoft.com/en-us/library/windows/desktop/ms680928(v=vs.85).aspx
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