ASP — Application Object

Application Properties

<%
' Set application variable
Application("siteName") = "My Website"

' Get application variable
Response.Write(Application("siteName"))
%>

Application Methods

<%
' Lock application
Application.Lock
Application("counter") = Application("counter") + 1
Application.Unlock
%>

Application Events

<!-- Global.asa -->
<SCRIPT LANGUAGE="VBScript" RUNAT="Server">
Sub Application_OnStart
    Application("startTime") = Now
    Application("visitorCount") = 0
End Sub

Sub Application_OnEnd
    ' Cleanup code
End Sub
</SCRIPT>

Visitor Counter

<%
Application.Lock
Application("visitors") = Application("visitors") + 1
Application.Unlock

Response.Write("You are visitor #" & Application("visitors"))
%>

Application vs Session

Feature	Application	Session
Scope	Global	Per-user
Lifetime	Until restart	Until timeout
Use	Shared data	User data

Mini Practice

1. Set application variables
2. Use Lock/Unlock
3. Create visitor counter
4. Add application events

Up Next

Continue with Server Object — server object details.