ASP Classes: 2011

whats .net framework ?

dotnet framework is software framework that runs on microsoft windows.
Programs written for the .NET Framework execute in a software environment (as contrasted to hardware environment), known as the common language runtime (CLR). The CLR is an application virtual machine.
To an end user, the promise of .NET is more programs available more quickly, on more platforms, with fewer problems.

ASP Procedure

The ASP source code can contain procedures and functions:
Ex:
<html><head><%
sub vbproc(num1,num2)
response.write(num1*num2)
end sub
%></head><body>
<p>Result: <%call vbproc(3,4)%></p>
</body></html>

Insert the <%@ language="language" %> line above the <html> tag to write the procedure/function in another scripting language:
<%@ language="javascript" %>
<html><head><%
function jsproc(num1,num2)
{
Response.Write(num1*num2)
}
%></head><body>
<p>Result: <%jsproc(3,4)%></p></body></html>

Differences Between VBScript and JavaScript ?
When calling a VBScript or a JavaScript procedure from an ASP file written in VBScript, you can use the "call" keyword followed by the procedure name. If a procedure requires parameters, the parameter list must be enclosed in parentheses when using the "call" keyword. If you omit the "call" keyword, the parameter list must not be enclosed in parentheses. If the procedure has no parameters, the parentheses are optional.
When calling a JavaScript or a VBScript procedure from an ASP file written in JavaScript, always use parentheses after the procedure name.

ASP Variables

lifetime variables ?

A variable declared outside a procedure can be accessed and changed by any script in the ASP file.
A variable declared inside a procedure is created and destroyed every time the procedure is executed. No scripts outside the procedure can access or change the variable.
To declare variables accessible to more than one ASP file, declare them as session variables or application variables.
Session Variables
Session variables are used to store information about ONE single user, and are available to all pages in one application. Typically information stored in session variables are name, id, and preferences.
Application Variables
Application variables are also available to all pages in one application. Application variables are used to store information about ALL users in one specific application.

ASP Basic Syntax Rules

In our ASP tutorial, every example shows the hidden ASP source code. This will make it easier for you to understand how it works.

Write Output to a Browser

An ASP file normally contains HTML tags, just like an HTML file. However, an ASP file can also contain server scripts, surrounded by the delimiters <% and %>.
Server scripts are executed on the server, and can contain any expressions, statements, procedures, or operators valid for the scripting language you prefer to use.

The response.write Command

The response.write command is used to write output to a browser. The following example sends the text "Hello World" to the browser:

Examples::-

<html>
<body>
<%
response.write("Hello World!")
%>
</body>
</html>

There is also a shorthand method for the response.write command. The following example also sends the text "Hello World" to the browser:

<html>
<body>
<%
="Hello World!"
%>
</body>
</html>

Run ASP on Your Own PC

Your Windows PC as a Web Server

Your own PC can act as a web server if you install IIS or PWS.
IIS or PWS turns your computer into a web server.
Microsoft IIS and PWS are free web server components.

IIS - Internet Information Server

IIS is a set of Internet-based services for servers created by Microsoft for use with Microsoft Windows.
IIS comes with Windows 2000, XP, and Vista. It is also available for Windows NT.
IIS is easy to install and ideal for developing and testing web applications.

PWS - Personal Web Server

PWS is for older Windows system like Windows 95, 98, and NT.
PWS is easy to install and can be used for developing and testing web applications including ASP.
We don't recommend running PWS for anything else than training. It is outdated and has security issues.

Windows Web Server Versions

Windows Vista Business, Enterprise and Ultimate come with IIS 7
Windows Vista Home Premium comes with IIS 7
Windows Vista Home Edition does not support PWS or IIS
Windows XP Professional comes with IIS 5.1
Windows XP Home Edition does not support IIS or PWS
Windows 2000 Professional comes with IIS 5.0
Windows NT Professional comes with IIS 3 and also supports IIS 4
Windows NT Workstation supports PWS and IIS 3
Windows ME does not support PWS or IIS
Windows 98 comes with PWS
Windows 95 supports PWS

How to Install IIS on Windows Vista

Follow these steps to install IIS on Windows Vista:

Open the Control Panel from the Start menu
Double-click Programs and Features
Click "Turn Windows features on or off" (a link to the left)
Select the check box for Internet Information Services (IIS), and click OK

After you have installed IIS, make sure you install all patches for bugs and security problems. (Run Windows Update).

How to Install IIS on Windows XP and Windows 2000

Follow these steps to install IIS on Windows XP and Windows 2000:

On the Start menu, click Settings and select Control Panel
Double-click Add or Remove Programs
Click Add/Remove Windows Components
Click Internet Information Services (IIS)
Click Details
Select the check box for World Wide Web Service, and click OK
In Windows Component selection, click Next to install IIS

After you have installed IIS, make sure you install all patches for bugs and security problems. (Run Windows Update).

Test Your Web

After you have installed IIS or PWS follow these steps:

Look for a new folder called Inetpub on your hard drive
Open the Inetpub folder, and find a folder named wwwroot
Create a new folder, like "MyWeb", under wwwroot
Write some ASP code and save the file as "test1.asp" in the new folder
Make sure your Web server is running (see below)
Open your browser and type "http://localhost/MyWeb/test1.asp", to view your first web page

Note: Look for the IIS (or PWS) symbol in your start menu or task bar. The program has functions for starting and stopping the web server, disable and enable ASP, and much more.

How to install PWS on Windows 95, 98, and Windows NT

For Windows 98: Open the Add-ons folder on your Windows CD, find the PWS folder and run setup.exe to install PWS.
For Windows 95 or Windows NT: Download "Windows NT 4.0 Option Pack" from Microsoft, and install PWS.
Test your web as described above.

How to install IIS on Windows Server 2003

When you start the Windows Server 2003, you should see the Manage Your Server wizard
If the wizard is not displayed, go to Administrative Tools, and select Manage Your Server
In the wizard, click Add or Remove a Role, click Next
Select Custom Configuration, click Next
Select Application Server role, click Next
Select Enable ASP.NET, click Next
Now, the wizard may ask for the Server 2003 CD. Insert the CD and let it run until it is finished, then click the Finish button
The wizard should now show the Application Server role installed
Click on Manage This Application Server to bring up the Application Server Management Console (MMC)
Expand the Internet Information Services (IIS) Manager, then expand your server, and then the Web Sites folder
You should see the Default Web Site, and it should not say (Stopped)
IIS is running!
In the Internet Information Services (IIS) Manager click on the Web Service Extensions folder
Here you will see that Active Server Pages are Prohibited (this is the default configuration of IIS 6)
Highlight Active Server Pages and click the Allow button
ASP is now active!

introduction of ASP...

What is asp ?

asp stands for active server page.
asp is a programme that run inside IIS.
IIS stands for internet information service.
asp run to To IIS you must have Windows NT 4.0 or later.

what is an asp file ?

the asp file just same as an html file.
An ASP file can contain text, HTML, XML, and scripts.
Scripts in an ASP file are executed on the server.
An ASP file has the file extension ".asp".

advantages :-

Dynamically edit, change, or add any content of a Web page.
Respond to user queries or data submitted from HTML forms.
Access any data or databases and return the results to a browse
The advantages of using ASP instead of CGI and Perl, are those of simplicity and speed.

Wednesday, 27 April 2011