session object

Posted on 2008-10-09
Last Modified: 2013-11-07
What is session object and how it is used. in / to display the result on the third page.
Question by:mahmood_786
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
  • 2
  • +1

Expert Comment

ID: 22680903
you can add something to the session like this

Page.Session.Add("key", value)

or normally you just do

Session("key") = value

and then to get the value back on another page you can just do

CType(MyObjectType, Session("key"))

professionals usually do something like htis

dim x as object = Session("key")
if x isnot nothing
 ' cast to your type
  CType(MyObjectType, Session("key"))
end if

Author Comment

ID: 22683411
what is key and what is value in here i do not understand

Expert Comment

ID: 22683626
Hi mahood_786
Before I explain anyting on that I wanted to know you .NET level or in general programming level. As it will help me in explaing you in that way.

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!


Assisted Solution

mrleowashingtonII earned 200 total points
ID: 22688620
The Key value is a variable that you assign. For example

You can now call that session variable from within your ASP.Net pages by using the

myvariable=CType(Session("user"), String)

You can then do whatever you need to do based on the user for that pparticular web page.

Expert Comment

ID: 22689631
If you need further clarification:

The first Line  in my comment would go into a login page for example. Now, the values is stored as a session key, (Like a variable that exist for the length of the session).

When the user moves from page to page, you must put in the second line (or something similar, ie open a data set based on the value in the session, or display certain values in a listbox.

You can assign the value to nearly anything, as long as you use it in the format shown behind the equal sign.

Expert Comment

ID: 22691348
Hi mahmood_786

I let try to explain Sessions in details then you can view code for rodmjay which will help you to use session in VB.NET.

In Any programming you have to use variables now each variable has a scope, which means what is the boundaries of each variable. You have private, public, Global. And each type name make sense. Now Session is a container of different variable which are kind of Global, when I say kind of means its available to every page in your application in the same browser. Another type of Container for global variable is Application which are available to you application irrespective of browser.

Now when I mentioned Session are like container which holds all the session variables not if you want to get any kind of variable out of this container then you need some key attached to every variable. Its like you have so many doors and you need key attached to each door to open and get the value :) so when you want to get the variable value you provide key to session variable and it will get or set value to that key.
To Set Value
Session("hiword") = "Hello"
To Get Value
Dim hi as String
hi = Session("hiword");

I hope that will make you understand what are sessions

Author Comment

ID: 22698557
harwant that was great explaination,so the above code will give the value of hello where ever it is called on the application pages?

Expert Comment

ID: 22698638
yes that's true you will get hello as results on every page provided it's been requested by the same browser

Accepted Solution

harwantgrewal earned 300 total points
ID: 22698987
Just a bit more on Sessions.
Basicly the sessions are stored on the server memory and when you open a browser a session ID is generated by browser whenever you try to create a session variable and then browser sends this session ID on each request made by the browser. And server session technology is so smart that get get the session container for your browser with that ID. And basically this session ID is stored as a cookie in the browser and if you disable the cookies you have to sepcify in your application that you want the application sessions to be cookie less, then you application automatically convertes all the URL to attach session ID in the string, and thats how you can get your session object.


Featured Post

PeopleSoft Has Never Been Easier

PeopleSoft Adoption Made Smooth & Simple!

On-The-Job Training Is made Intuitive & Easy With WalkMe's On-Screen Guidance Tool.  Claim Your Free WalkMe Account Now

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

More often than not, we developers are confronted with a need: a need to make some kind of magic happen via code. Whether it is for a client, for the boss, or for our own personal projects, the need must be satisfied. Most of the time, the Framework…
The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…
Finding and deleting duplicate (picture) files can be a time consuming task. My wife and I, our three kids and their families all share one dilemma: Managing our pictures. Between desktops, laptops, phones, tablets, and cameras; over the last decade…

730 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question