| Events | Methods | Properties | Collections |
What is session object
The unique instance
of application which individual user run is known as session. For example consider
a user start up the application and open a file to edit.he continues to make
changes and finally save and close the file.the time period during which he
is editing the file can be thought of as a session. The session object
is used to interact with session. The session can be used to store a piece of
information that is available to every page in the application.
Asp Session Object – events
1) Session_Onstart
– triggered when a new user enters into ASP application.For example save the
following code in global.asa.
Sub
Session_Onstart
Session(“start”) = now
Application.Lock
Application(“visitor”) = Application(“visitor”)
+ 1
Application.UnLock
End Sub
2) Session_OnEnd
– Initiated when ASP session object terminated.
Sub
Session_OnEnd
Application.Lock
Application(“visitor”) = Application(“visitor”)
– 1
Application.UnLock
End Sub
Asp Session Object – Methods
1)Abandon
– destroys all the objects stored in Session objects and releases the server
resources they were occupying.All the session variable values will be
lost.We can call this method using following statement.
<%Session.abandon%>
2)Contents.Remove
– The Remove method deletes a specific item from the Session object’s Contents
collection.
For eg.
<%
Session(“TestVar”) = “Test String”
Session(“AnotherVar”) = “Another String”
Session.Contents.Remove(TestVar)
%>
Asp Session Object – Properties
1)SessionId
– When a session is created the server generate a unique Id number for each
session.SessionId property returns the session Id number.The syntax is:
<%=Session.SessionId%>
2)TimeOut
– sets timeout period assigned to the session object for any application in
minutes.If the user does not refresh the page before the time out period expires
, the session ends.We can set time using following statement.
<%Session.TimeOut
= 25%>
3) CodePage
– determines the codepage that will be used to display the contents.This is
used only when you are using non_Roman alphabets.In order to set the session’s
code page you must first enable code page support with.
The following is an example to set the code page to Roman alphabet.
<%@
code page = codepage
Session.codepage = 1252
%>
4) LCID
– determines time zone and language for the system. For eg. to set US English
<%Session.LCID
= 1033%>
Asp Session Object – Collections
1)Contents
collection- Contains the items that you have added to the session with script
commands.
2)StaticObjects
collection – Contains the objects created with the <OBJECT> tag and given
session scope.