ASP. What is ASP? ASP stands for Active Server Pages ASP is a Microsoft Technology ASP is a program...
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Transcript of ASP. What is ASP? ASP stands for Active Server Pages ASP is a Microsoft Technology ASP is a program...
ASP
What is ASP?
• ASP stands for Active Server Pages • ASP is a Microsoft Technology • ASP is a program that runs inside IIS IIS stands
for Internet Information Services• PWS (Personal Web Server) is a smaller - but
fully functional - version of IIS• To run IIS you must have Windows NT 4.0 or later• To run PWS you must have Windows 95 or later
ASP file
• An ASP file is just the 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"
What can ASP do for you?
• 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 browser
• Customize a Web page to make it more useful for individual users
• Provide security - since ASP code cannot be viewed from the browser
• Clever ASP programming can minimize the network traffic
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, Vista, and Windows 7. It is also available for Windows NT.
• IIS is easy to install and ideal for developing and testing web applications.
How to Install IIS on Windows 7 and Windows Vista
Follow these steps to install IIS:• 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
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 • Open your browser and type
"http://localhost/MyWeb/test1.asp", to view your first web page
ASP Basic Syntax Rules
• An ASP file normally contains HTML tags, just like an HTML file.
• any ASP server script must be surrounded by the symbols <% … %>
The response.write Command
<!DOCTYPE html><html><body><%response.write("Hello World!")%></body></html>
ASP Variables
<!DOCTYPE html><html><body>
<%dim namename="Donald Duck"response.write("My name is: " & name)%>
</body></html>
Procedures
A Sub procedure:• is a series of statements, enclosed by the Sub
and End Sub statements• can perform actions, but does not return a
value• can take arguments
Procedures<!DOCTYPE html><html><head><%sub vbproc(num1,num2)response.write(num1*num2)end sub%></head><body>
<p>Result: <%call vbproc(3,4)%></p>
</body></html>
Function Procedure
A Function procedure:• is a series of statements, enclosed by the Function
and End Function statements• can perform actions and can return a value• can take arguments that are passed to it by a
calling procedure• without arguments, must include an empty set of
parentheses ()• returns a value by assigning a value to its name
Function<!DOCTYPE html><html><body>
<%Function myfunction()myfunction=Date()End Function
response.write("Today's date: ")response.write(myfunction())%>
<p>A Function procedure can return a result.</p>
</body></html>
ASP OBJECTS
RESPONSE:• The ASP Response object is used to send output to the
user from the server.Property:• Buffer: response.Buffer[=Flag ]• False indicates no buffering. The server will send the
output as it is processed.• True indicates buffering. The server will not send output
until all of the scripts on the page have been processed, or until the Flush or End method has been called.
Response
Methods:• Redirect: Redirects the user to a different URL• Write: Writes a specified string to the output• Clear: Clears any buffered HTML output• End: Stops processing a script, and returns the
current result• Flush: Sends buffered HTML output
immediately
Response.clear<%response.Buffer=true%><html><body><p>This is some text I want to send to the user.</p><p>No, I changed my mind. I want to clear the text.</p><%response.Clear%></body></html>
Output:
(nothing)
Response.End
<html><body><p>I am writing some text. This text will never be<%Response.End%>finished! It's too late to write more!</p></body></html>
Output:
I am writing some text. This text will never be
Request Object
• The Request object is used to get information from a visitor.
Collections:• Form Contains all the form (input) values from a
form that uses the post method (POST Method)• QueryString Contains all the variable values in a
HTTP query string (GET Method)• ServerVariables Contains all the server variable
values
ServerVariables
You can loop through all of the server variables like this:<%for each x in Request.ServerVariables response.write(x & "<br>")next%>
ServerVariables<html><body><p><b>You are browsing this site with:</b><%Response.Write(Request.ServerVariables("http_user_agent"))%></p><p><b>Your IP address is:</b><%Response.Write(Request.ServerVariables("remote_addr"))%></p><p><b>The server's domain name:</b><%Response.Write(Request.ServerVariables("server_name"))%></p><p><b>The server's port:</b><%Response.Write(Request.ServerVariables("server_port"))%></p><p><b>The server's software:</b><%Response.Write(Request.ServerVariables("server_software"))%></p></body></html>
http://www.w3schools.com/asp/coll_servervariables.asp
QueryString<!DOCTYPE html><html><body>
<form action="demo_simplereqquery.asp" method="get">First name: <input type="text" name="fname"><br>Last name: <input type="text" name="lname"><br><input type="submit" value="Submit"></form>
<%Response.Write(Request.QueryString)%>
</body></html>http://www.w3schools.com/asp/showasp.asp?filename=demo_simplereqquery
QueryString<!DOCTYPE html><html><body><form action="demo_reqquery.asp" method="get">Your name: <input type="text" name="fname" size="20" /><input type="submit" value="Submit" /></form><%dim fnamefname=Request.QueryString("fname")If fname<>"" Then Response.Write("Hello " & fname & "!<br>") Response.Write("How are you today?")End If%></body></html>http://www.w3schools.com/asp/showasp.asp?filename=demo_reqquery
Request.Form<!DOCTYPE html><html><body>
<form action="demo_form2.asp" method="post">First name:<input type="text" name="name" value="Donald" /><br>Last name:<input type="text" name="name" value="Duck" /><br><input type="submit" value="Submit" /></form><hr><p>The information received from the form above was:</p><%
If Request.Form("name")<>"" Then Response.Write("<p>") Response.Write("name=" & Request.Form("name")) Response.Write("</p><p>") Response.Write("The name property's count is: ") Response.Write(Request.Form("name").Count) Response.Write("</p><p>") Response.Write("First name=" & Request.Form("name")(1)) Response.Write("</p><p>") Response.Write("Last name=" & Request.Form("name")(2)) Response.Write("</p>") End if%></body></html>
• http://www.w3schools.com/asp/showasp.asp?filename=demo_form2
Cookies
• A cookie is often used to identify a user.• A cookie is a small file that the server embeds
on the user's computer. • It is a small piece of data sent from a website
and stored in a user's web browser while the user is browsing that website.
• Every time the user loads the website, the browser sends the cookie back to the server to notify the website of the user's previous activity
Cookies
• With ASP, you can both create and retrieve cookie values.
• The "Response.Cookies" command is used to create cookies.
• The Response.Cookies command must appear BEFORE the <html> tag.
Session
• A Session object stores information about, or change settings for a user session.
• Variables stored in a Session object hold information about one single user, and are available to all pages in one application.
• Common information stored in session variables are name, id, and preferences.
• The server creates a new Session object for each new user, and destroys the Session object when the session expires.
