2. INDEX
Introduction
Overview of Session
Session – Property/Method
Session - Example
Session Configuration
Advantages And Disadvantages Of Session
Overview Of Cookie
How cookies Started?
Cookie - Property
Cookie – Example
Advantages And Disadvantages Of Cookie
Differences Between Session & Cookie
References
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Session & Cookie
3. BASIC ABOUT STATE MANAGEMENT
ASP.NET framework provides various ways to preserve
the states at various stage.
controlstate, viewstate, cookies, session, etc.
These can be defined at the client side and server side
state management
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Session & Cookie
5. OVERVIEW OF SESSION
Session is server side object.
It is saving your data for the
session you are using the site.
There is a time for which this
objects stay in the memory.
Session is defined in
Web.Config for session state
section otherwise 20 mins by
default.
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Fig : For every client session
data store separately
Session & Cookie
6. SESSION
The Session is active:
Till the user closes the browser or
A certain period expires (20 minutes )
Every session is identified by a unique SessionID
Created at first entry in the site
Transmitted in a cookie by default
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Session & Cookie
7. PROPERTY
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Property Description
Count Gives the number of session variables which
are in memory.
Session ID Give you unique SessionID,which is assign to
your session.
TimeOut Get or Set TimeOut period.
IsNewSession A Boolean value specifies whether session is
new or old one.
IsCookieLess A Boolean value specifies whether session is
Cookless or not.
Keys A collection of all keys
Session & Cookie
8. METHOD
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Method Description
Session.Remove
(StrSessionName)
Remove an Item from session state
collection.
Session.RemoveAll() Remove all Items from session collection.
Session.Clear() There is no difference between clear and
RemoveAll().RemoveAll() calls
Clear().internally.
Session & Cookie
9. SESSION - EXAMPLE
Session Declaration:
Session Retriving:
Session Removing:
To handle events fired when a session is started or
ended we use Session_OnStart and Session_OnEnd in
the Global.asax file
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Session["username"] = "pesho";
string = Session["username"].ToString();
Session.Remove(“username");
or
Session[“username"] = null;
Session & Cookie
10. SESSION CONFIGURATION
We can configure various aspects of the session
mechanism
Use the sessionState section in Web.config
Example:
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<system.web>
<sessionState
cookieless="true" mode="InProc"
timeout="60" cookieName="MySite" />
</system.web>
To deny/restrict access to the session
<%@ Page EnableSessionState="False"%>
<%@ Page EnableSessionState="ReadOnly" %>
Session & Cookie
11. ADVANTAGES & DISADVANTAGES
Advantages:
Session provide us the way of maintain user data
to all over the application.
session is that we can store any kind of object in it.
:eg, database, dataset.. Etc
Session is secure and transparent from the user.
Disadvantages:
Performance overhead in case of large volumes of
user, because session data is stored in server memory.
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Session & Cookie
12. OVERVIEW OF COOKIES
Cookies are the small files that are created on the
client's system or client browser memory.
We can store small pieces of information in a client
system and use it when needed.
It works transparently with the user.
It can be easily used anywhere in your web application
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Session & Cookie
15. PROPERTY
Property Description
Name Specify name of cookie
Value Contains value of cookie
Expires Get or Set expiration Date of cookie.
Expired Informs you whether cookie is expired or not.
Domain Specific domain can be specified,if cookie
store in specific folder.
Path Allows you to set or get path of cookie to be
store.
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Session & Cookie
16. COOKIE - EXAMPLE
working with cookies, we need to use the namespace
System.web.
Creating a cookie that will be sent to the client Web
browser:
Reading a cookie received at the server:
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HttpCookie cookie = new HttpCookie
("UserName", "bajivan");
Response.Cookies.Add(cookie);
HttpCookie cookie = Request.Cookies["UserName"];
Session & Cookie
17. ADVANTAGES & DISADVANTAGES
Advantages:
It's very simple to use and implement.
Browser takes care of sending the data.
For multiple sites with cookies, the browser automatically
arranges them.
Disadvantages:
It stores data in simple text format, so it's not secure at
all.
There is a size limit for cookies data (4KB). .
Most browsers provide limits the number of cookies is
20.
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Session & Cookie
18. 1. Cookies can store only
"string" data type
2. They are stored at Client
side
3. Cookie is non-secure since
stored in text format at client
side
4. Only in few situations we
can use cookies because
of no security
1.Session can store any data
type
2. These are stored at Server
side
3. Session are secure because
it is stored in binary format
4. For all condition /situations
we can use sessions
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DIFF BETWEEN COOKIES & SESSION
Session & Cookie
