ASP Forms - Sessions

A good way to visualize a session is to think of opening a program. That would start your session. Then you work in it and close it. That would be the end of your session. A Session Object stores data about a user session, and can change settings for that user session. When you begin a session in ASP, it creates a cookie with information about the user. The information is available to all pages within the application. Types of data stored are typically the user's name and any preferences they may have. The session object is destroyed after the session is over.

Beginnings and Endings

As I said, sessions have a beginning and an ending. Look at these two nifty bulleted lists that outline their time line:

A session begins:

• If the user requests an ASP file with a Global.asa file that contains a Session_OnStart procedure.

• Whenever a value is stored in a Session variable.
  

• When a user requests an ASP file with a Global.asa that contains the object tag that will "instantiate" a particular object with sessional scope.

A session ends:

• When the user has made no requests or has not refreshed a page within the application for a period that you specify. Note that this value is 20 minutes by default.

Setting the Session Timeout

You can change the amount of time before your session times out by using the Timeout property. Here is how that works:

<%

Session.Timeout=10

%>

Next: How to Store Sessions and Retrieve Them >>
 

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