This document discusses key concepts in ASP.NET including the page lifecycle consisting of 11 events, handling page events, cross-page posting, basic .NET objects like the Response, Request, Server, Session and Application objects, ASP.NET file types like Web.config, Global.asax, aspx files and user controls, and an introduction to web services using standardized XML messaging.

1. Page Life Cycle
Basic Objects of .NET
ASP.NET File Types
Web Form and Web Services
Exception Handling

2. Page Life Cycle

3. Continue…….
• Sequence of events are as follow:
1. PreInit
2. Init
3. InitComplete
4. PreLoad
5. Load (before any control events)
6. LoadComplete
7. PreRender(after any control event)
8. PreRenderComplete
9. SaveStateComplete
10.Unload

4. Continue……
Handling Page Events
• Whenever you request a page, a particular set of
events is raised in a particular sequence.
• This sequence of events is called the Page execution
lifecycle.

5. Cross-Page Posting
• Under some circumstances, you might want a
page to post to a different page, not to itself. This
is referred to as cross-page posting.
Page Model
• You can create Single-File code model and Code-
Behind page model.

6. Basic objects of .NET
Response Object:
Response object is called the output object.
It represent information going out from the server to
the browser.
Collection : Cookies.
Properties :
Cache Control, Charest, Content Type,
Expires, Expires Absolute, Is Client Connected,
Status etc.
Methods :
Append To Log(), Binary Write(), Clear(),End(),
Flush(), Redirect(), Write().

7. Continue……
 Request Object:
• The Request object is called the input object.
• This objects represent information coming into the
Web Server from the browser .
 collections are: Cookies, Form ,Query String, Server
Variables
 Methods are: Binary Read ()

8. Continue…….
Server Object:
The Server object is used to access properties and
methods on the server.
 Properties: Script Timeout .
 Methods: Create Object , Get Last Error() , HTML Encode,
Map Path, Transfer, URL Encode

9. Continue…….
Session Object:
 Variables stored in a Session object hold information
about one single user, and are available to all pages in one
application.
 Collections: Contents, Static Objects.
 Properties: Code Page, LCID, SessionID, Timeout.
 Methods: Abandon, Contents. Remove(), Contents.Remove
All() .
 Events: Session_On End, Session_OnStart .

10. Continue…..
Application Object:
 This object is used to store and access variables from any
page, just like the Session object.
 The difference is that ALL users share ONE Application
object (with Sessions there is ONE Session object for
EACH user).
 Collections: Contents, Static Objects
 Methods : Contents. Remove(), Contents.RemoveAll(),Lock(),
UnLock() .
 Events : Application_OnEnd, Application_OnStart,
Application_OnError .

11. ASP.NET File Types
Web.Config File
Global.asax File
WebForm.aspx File
WebForm.aspx.cs File
UserControl.ascx File

12. Special File in ASP.NET Website
Configuration and Global Application file:
• ASP.NET provide various way to handle an application on
different levels.
• You can handle website generally on three level-
1. Control level
2. page level
3. application level
• To handle at application level we use configuration
(Web.config) and Global application(global.asax) file.

13. Web Services
A Web Service Is Any Piece of Software that Makes
it Available Over The Internet And Uses.
 A STANDARDISED XML MESSAGING SYSTEM.XML
is used to encode all communication to a web service.