Web application and asp net

Describe the following: Explain Active Server Pages Explain the features of ASP.NET... Web-enabled Application ArchitectureProxy Server Internet Web server Certificate Client 1 Browser

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Chapter 1

Introduction to Web

Applications and ASP.NET

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Describe the following:

Explain Active Server Pages

Explain the features of ASP.NET

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Client 1

Client 2

Client/Server and Web Applications

ASP.NET and Webforms / Chapter 1/ Slide 3 of 22

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Web-enabled Application Architecture

Proxy Server

Internet

Web server Certificate

Client 1

(Browser)

Database Server

server HTTP

Certificate Server

Server-based programs

ASP CGI ISAPI

Other servers

FTP SMTP Exchange Server

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Network Interface and HTTP Service

Network Interface

Transport Layer

and

Internet

and Internet Layer (TCP / IP)

Windows Sockets

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Accessing Database Information

Web server HTTP

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Web Application Development Cycle

Designing the application

Planning the Web application

Constructing and testing the components of the application

Going live

Production and maintenance

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Web Application Development Process

Functional specifications

No

Design phase

complete?

Design complete?

Yes

Complete?

Going live

Production and maintenance

No

Yes No

Yes

A

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JavaScript data validationdata validation

Data valid?

Valid Data Submit data to serverto server

Yes

No

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Client-Side Scripting

Provide user interaction

Dynamically change content

Validate dataIntegration

JavaScript statements;

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Active Server Pages

<%If Time >= #12:00:00 AM# And Time < #12:00:00 PM# Then%>

"Now the time is between 12:00 am and 12:00 pm"

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Processing of ASP File

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Advantages of ASP

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ASP File in a Web-based Application

Active ServerPages (ASP)JavaScriptVBScript

Active Server Pages (ASP)JavaScriptVBScript

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Evolution of ASP.NET

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Advantages of ASP.NET

Compiled pages improve execution speed

Supports strongly typed languages like C#, VB

Compiled pages improve execution speed

ASP code is separated from the HTML design

and text Provides declarative server controls

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Advantages of ASP.NET (Contd.)

Supports re-use of code by the inheritance

An inbuilt method, Trace, helps to debug a page

Supports re-use of code by the inheritance

mechanism

No need to register component

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Features of ASP.NET - 1

Adds functionality using C# or VB.NET

Uses server - side caching

ASP.NET

Ships with many in-built server controls

Recognizes the type of client browser and accordingly displays the contents to the client

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Features of ASP.NET - 2

Refers hierarchical namespaces

Global.asax file holds

Global.asax file holds additional events

Web service - a function deployed and used over the Web

ASP.NET

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Chapter 2

ASP.NET Objects

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Explain the basics of ASP.NET

Discuss the process flow of an ASP.NET Page

Explain the Page_Load event

Use the Request and Response objects

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HTML Control

An ASP.NET Page– 2

Web Control

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Starting with ASP.NET

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t sender,EventArgs e)

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Page_Load Event

World

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Process Flow

Execution on the server

HTTP Request

HTML

6

3

User causes Postback

4

LPage

Values

after

Postback

Changes are processed

7

HTMLPage

5

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ASP.NET Objects -1

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ASP.NET Objects –2

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ASP.NET Objects – 3

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Virtual Directories

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Permissions

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HTTP Protocol

HTTP Response HTTP

Request

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Request and Response

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Response.Redirect

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Chapter 3

ASP.NET Controls

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Explain Web controls

Identify the Object model

Use:

Discuss rich controls

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Web Controls

ASP.NET

ASP.NET Controls

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TextBox

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Object Model - 2

void click1(Object Src, EventArgs E){

<asp:textbox id="cur_obj" size = 40 runat="server"/> <br><br>

<asp:button type = submit text= "Say Hello!!!" OnClick="click1" runat =

"server" /><br>

</form>

</body>

</html>

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<asp:textbox id="name" runat="server"/>

Text Entry - Intrinsic Control

Single-line entry

Multi-line entry

<asp:textbox id="add" textmode="multiline"

rows="5" columns="10" runat="server"/>

<asp:textbox id="pass" textmode="password"

runat="server"/>

Multi-line entry

Password entry

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Control Transfer - Intrinsic Control

Navigate between the pages

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Difference in Intrinsic Controls code

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<asp:checkbox id = "chk1" Text = "have U selected me" runat="server"/>

<asp:radiobutton id ="rad1" Text =" button 1" groupname="radio" runat="server"/>

Selection - Intrinsic Control - 1

CheckBox

RadioButton

<asp:listbox id="lb" runat="server"/>

<asp:dropdownlist id= "ddl" runat="server" />

ListBox

DropDownList

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Data Populating Methods of

Selection Intrinsic Control

void Page_Load (Object Src, EventArgs E)

<asp:listbox id="lbs" runat="server">

<asp:ListItem> One </asp:ListItem>

<asp:ListItem> Two </asp:ListItem>

<asp:dropdownlist id= "ddl" runat="server" >

<asp:ListItem> One </asp:ListItem>

<asp:ListItem> Two </asp:ListItem>

<asp:ListItem> Three </asp:ListItem>

</asp:dropdownlist>

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Container controls can contain other controls

One of the main uses of container controls is

that the visibility of a group of controls can be changed at one point by placing them in a

container control, and setting the property of

Container

<asp:panel id="pan" Visible="False" runat="server" >

<asp:textbox id="pass1" textmode="password" runat="server"/>

<asp:textbox id="pass2" textmode="password" runat="server"/>

</asp:panel>

container control, and setting the property of

the container control

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Rich Controls

Used for changing

the advertisements

on the Web pages

Gives full functionality

of a calendar

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Category assigned to the ad Priority of the advertisement

in the schedule of rotation

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AdRotator - 2

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Calendar control responds to two events:

Calendar Control

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Chapter 4

Advanced Validation Techniques

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Explore the various Validation controls

Explain code behind

Implement code behind

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Validation Controls

Restricts blank fieldCompares two fieldsChecks for specified range

RequiredFieldValidator

CompareValidator

RangeValidator

Checks value with expression

Checks value of client-side

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Inline error message

RequiredFieldValidator

entered

<asp:requiredfieldvalidator controltovalidate="userid"

display="static" errormessage="You must enter your user

id." runat=server>

The User Id cannot be left Blank!

</asp:requiredfieldvalidator>

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Validation Error Message

Dynamic Display

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< asp:comparevalidator controltovalidate="pwd_con" display="static" errormessage="the confirmation password does not match."

controltocompare="pwd" type ="String" operator="Equal"

runat=server> *

</ asp:comparevalidator > = , < , > , <= , >= , Not Equal

CompareValidator

< asp:comparevalidator controltovalidate="bid" display="static"

errormessage="You cannot enter a bid for lesser than $100.“

valuetocompare =100 type="Integer" operator="GreaterThanEqual"

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< asp:rangevalidator controltovalidate="r3" type="Integer"

control for the range

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Sign Meaning

^ The caret sign ^ specifies that checking starts from here

$ The “$” sign specifies that the checking ends here

[] Square brackets “[]” checks that the value entered match with any

RegularExpressionValidator - 1

[] Square brackets “[]” checks that the value entered match with any

of the characters that are in the square brackets.

\w “\w” allows any value to be entered

/d{} “/d” specifies that the value entered is a digit, and {} specifies the

number of occurrences of the specified data type

+ The + sign indicates that one or more elements to be added to the

expression being checked

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<asp:customvalidator runat="server"

controltovalidate="grade"

clientvalidationfunction="clval"

Client-side function

CustomValidator

onservervalidate="serval" display="static">

Wrong value

</asp:customvalidator>

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<asp:validationsummary id="vs1" headertext="The

errors found are: " displaymode="singleparagraph"

runat="server"/>

ValidationSummary

runat="server"/>

</asp:customvalidator>

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Page.IsValid Property

void validate_page(Object Src, EventArgs E){

if (Page.IsValid == true) {

lbl.Text = "Page is Valid!";}

else {

lbl.Text = "Page is not Valid!"; }

}

</script>

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Uplevel and Downlevel Browsers

<%@ Page ClientTarget=DownLevel %>

Disable

client-side validation

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<%@ Page language="C#" Inherits="codeb" %>

<html>

</script>

Provides the functionality

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public System.Web.UI.WebControls.Button bMe;

protected void bMe_Click(Object sender, EventArgs e) {

lb1.Text = "Clicked!";

} void Main() {

}

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Chapter 5

The Application And Server Objects

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Discuss the Global.asax file

Explain events in Global.asax file

Use the Application object

Use the Server object

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Stored in the application’s root directory

Defines boundary of application

Initialize application or session level variables

Connect to databases

Send cookies

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Session_OnStart Fired every time a new session begins.

Session_OnEnd Fired when the session ends Refer to the session on

the Session object for the various ways in which a session can end.

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Events in Global.asax - 2

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Application Object - 2

void Application_OnStart(Object sender, EventArgs E) {

Application ["greeting"] = "Welcome to my World";

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void Application_OnStart(Object sender, EventArgs E) {

Application ["Counter"] = 0;

}</script>

<html>

void Page_Load(Object Src, EventArgs E){

Application["Counter"] = (Int32) Application ["Counter"] + 1;

Response.Write("You are visitor number :" + Application ["Counter"]);

}</script>

<MARQUEE BEHAVIOR="scroll" Scrolldelay = 25><FONT SIZE = 5

COLOR

= RED>Welcome to my World</FONT></MARQUEE>

</form></html>

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Controlling Access

<HTML>

void Page_Load(Object Src, EventArgs E)

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void Application_Start(Object sender, EventArgs E)

{ String [] job = new String [4];

job[0]= "Faculty"; job[1]= "Programmer";

job[2]= "Salesman"; job[3]= "Manager";

Application ["j"] = job; } </script>

<<HTML> <script Language ="C#" runat ="server" >

void Page_Load(Object Src, EventArgs E) {

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Execute Method

<%@ Page Debug ="true"%><html>

void clicked (Object Src, EventArgs E){

Server.Execute("/test/ses6ex1.aspx");}

</script>

<asp:button id = "btn1" onclick = "clicked" Text =" Click me to transfer execution" runat = "server" />

</form></html>

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Transfer Method

Server.Transfer("/test/transfer.aspx");

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ap.aspx"));

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URLEncode Method - 2

<html>

void clicked (Object Src, EventArgs E)

{

String name = Server.UrlEncode("John Saunders");

Response.Redirect

<html>

void clicked (Object Src, EventArgs E)

<asp:button id = "btn1" onclick = "clicked" Text =" Click me

to send values" runat = "server" />

<asp:button id = "btn1" onclick = "clicked" Text =" Click me

to send values" runat = "server" />

</form>

</html>

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URLEncode Method - 3

String password = Server.UrlEncode("king");

Response.Redirect("http://localhost/code/error.aspx?name=" + name + " &password=" + password);

}</script>

String password = Server.UrlEncode("king");

Response.Redirect("http://localhost/code/error.aspx?name=" + name + " &password=" + password);

}</script>

<asp:button id = "btn1" onclick = "clicked" Text =" Click me to send values" runat = "server" />

</form></html>

}</script>

<asp:button id = "btn1" onclick = "clicked" Text =" Click me to send values" runat = "server" />

</form></html>

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Chapter 6 6

The Session Object

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Describe Cookies

Read and write Cookies

Explain the use of session object

Define stateliness of a session

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Cookies - 1

A cookie is a small packet of information that is

used to maintain information on the user's

computer A cookie can be temporary or

persistent

Expires when

the user leaves

the Web site

Retained on the clientmachine and can be read bythe Web server when theuser next accesses the Website

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Retrieving Data - 1

HttpCookie cookie = Request.Cookies[“cookiename”];

void Page_Load(Object Sender, EventArgs E){

HttpCookie cookie1 = new HttpCookie("UserName");

DateTime dt = DateTime.Now;

TimeSpan ts = new TimeSpan(0,0,1,0);

cookie1.Expires = dt.Add(ts);

Response.Cookies.Add(cookie1);

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<asp:Label id = "Display1" runat="server" /><br><br>

<asp:Label id = "Display2" runat="server" />

</html>

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