Session Object

2012 年 9 月 14 日5970

ASP Session Object

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A Session object stores information about, or change settings for a user session.


Examples

Try it Yourself - Examples

Set and return the LCID
Set or return an integer that specifies a location or region. Contents like date,
time, and currency will be displayed according to that location or region.

Return the SessionID
Return
a unique id for each user. The id is generated by the server.

A session's timeout
Set and return the timeout (in minutes) of a session.


Session Object

When you are working with an application on your computer, you open it, do some changes and then
you close it. This is much like a Session. The computer knows who you are. It
knows when you open the application and when you close it. However, on the internet there is one
problem: the web server does not know who you are and what you do, because the HTTP address doesn't maintain state.

ASP solves this problem by creating a unique cookie for each user. The cookie
is sent to the user's computer and it contains information that identifies the user. This
interface is called the Session object.

The Session object stores information about, or change settings for a user session.

Variables stored in a Session object hold information about one single user, and are available to all pages in one application. Common information
stored in session variables are name, id, and preferences. The server creates a new Session object for each new user, and destroys the Session object when the session expires.

The Session object's collections, properties, methods, and events are
described below:

Collections

Collection Description

Contents
Contains all the items appended to the session through a script command

StaticObjects
Contains all the objects appended to the session with the HTML
<object> tag

Properties

Property Description

CodePage
Specifies the character set that will be used when
displaying dynamic content

LCID
Sets or returns an integer that specifies a location or
region. Contents like date, time, and currency will be displayed according
to that location or region

SessionID
Returns a unique id for each user. The unique id is
generated by the server

Timeout
Sets or returns the timeout period (in minutes) for the
Session object in this application

Methods

Method Description

Abandon
Destroys a user session

Contents.Remove
Deletes an item from the Contents collection

Contents.RemoveAll()
Deletes all items from the Contents collection

Events

Event Description

Session_OnEnd
Occurs when a session ends

Session_OnStart
Occurs when a session starts

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