ASP Application Object

A group of ASP files that work together to
perform some purpose is called an application. The Application object in ASP is
used to tie these files together.

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Application Object

An application on the Web may be a group of ASP files. The ASP
files work together to perform some purpose. The Application object in ASP is
used to tie these files together.

The Application object is used to store and access variables
from any page, just like the Session object. The difference is that ALL users
share one Application object, while with Sessions there is one Session object
for EACH user.

The Application object should hold information that will be
used by many pages in the application (like database connection information).
This means that you can access the information from any page. It also means that
you can change the information in one place and the changes will automatically
be reflected on all pages.

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Store and Retrieve Application Variables

Application variables can be accessed and changed by any page
in the application.

You can create Application variables in "Global.asa"
like this:

<script language="vbscript" runat="server"> Sub Application_OnStart application("vartime")="" application("users")=1 End Sub </script>

In the example above we have created two Application
variables: "vartime" and "users".

You can access the value of an Application variable like this:

There are <% Response.Write(Application("users")) %> active connections.

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Loop Through the Contents Collection

The Contents collection contains all application variables.
You can loop through the Contents collection, to see what's stored in it:

<% dim i For Each i in Application.Contents Response.Write(i & "<br />") Next %>

If you do not know the number of items in the Contents
collection, you can use the Count property:

<% dim i dim j j=Application.Contents.Count For i=1 to j Response.Write(Application.Contents(i) & "<br />") Next %>

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Loop Through the StaticObjects Collection

You can loop through the StaticObjects collection, to see the
values of all objects stored in the Application object:

<% dim i For Each i in Application.StaticObjects Response.Write(i & "<br />") Next %>

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Lock and Unlock

You can lock an application with the "Lock" method.
When an application is locked, the users cannot change the Application variables
(other than the one currently accessing it). You can unlock an application with
the "Unlock" method. This method removes the lock from the Application
variable:

<% Application.Lock 'do some application object operations Application.Unlock %>