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ASP Cookies

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A cookie is often used to identify a user.


Welcome cookie
How to create a Welcome cookie.

What is a Cookie?

A cookie is often used to identify a user. A cookie is a small file that the server embeds on the user's computer. Each time the same computer requests a page with a browser, it will send the cookie too. With ASP, you can both create and retrieve cookie values.

How to Create a Cookie?

The "Response.Cookies" command is used to create cookies.

Note: The Response.Cookies command must appear BEFORE the <html> tag.

In the example below, we will create a cookie named "firstname" and assign the value "Alex" to it:


It is also possible to assign properties to a cookie, like setting a date when the cookie should expire:

Response.Cookies("firstname").Expires=#May 10,2002#

How to Retrieve a Cookie Value?

The "Request.Cookies" command is used to retrieve a cookie value.

In the example below, we retrieve the value of the cookie named "firstname" and display it on a page:

response.write("Firstname=" & fname)



A Cookie with Keys

If a  cookie contains a collection of multiple values, we say that the cookie has Keys.

In the example below, we will create a cookie collection named "user". The "user" cookie has Keys that contains information about a user:


Read all Cookies

Look at the following code:


Assume that your server has sent all the cookies above to a user.

Now we want to read all the cookies sent to a user. The example below shows how to do it (note that the code below checks if a cookie has Keys with the HasKeys property):

dim x,y
for each x in Request.Cookies
  if Request.Cookies(x).HasKeys then
    for each y in Request.Cookies(x)
      response.write(x & ":" & y & "=" & Request.Cookies(x)(y))
      response.write("<br />")
    Response.Write(x & "=" & Request.Cookies(x) & "<br />")
  end if
  response.write "</p>"




What if a Browser Does NOT Support Cookies?

If your application deals with browsers that do not support cookies, you will have to use other methods to pass information from one page to another in your application. There are two ways of doing this:

1. Add parameters to a URL

You can add parameters to a URL:

<a href="welcome.asp?fname=John&lname=Smith">
Go to Welcome Page</a>

And retrieve the values in the "welcome.asp" file like this:

response.write("<p>Hello " & fname & " " & lname & "!</p>")
response.write("<p>Welcome to my Web site!</p>")

2. Use a form

You can use a form. The form passes the user input to "welcome.asp" when the user clicks on the Submit button: 

<form method="post" action="welcome.asp">
First Name:  <input type="text" name="fname" value="">
Last Name: <input type="text" name="lname" value="">
<input type="submit" value="Submit">

Retrieve the values in the "welcome.asp" file like this:

response.write("<p>Hello " & fname & " " & lname & "!</p>")
response.write("<p>Welcome to my Web site!</p>")

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