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The Request.QueryString Collection

Quite often, you might have seen page URL’s like the one below:
http://www.greetings.com/show.asp?CardID=128762173676
This is a direct link to a card that your friend sent you. You just need to click
on the link, and the card shows up. You do not need to identify yourself or
enter any code number anywhere. All the information that the site needs, is
encoded in the string,
CardID=128762173676
This is known as the Query String and forms part of a URL.
You can pass multiple values too, using something like:
Page.asp?FirstName=Manas&LastName=Tungare&Sex=M
The Request.QueryString Collection helps you sort this stuff out and extract
only what you need – the values of the variables themselves.
So to access the data contained in the variable FirstName above, you would
use:
Request.QueryString (“FirstName”)

This again, is a regular variable that you can assign to another, or do
arithmetic on.
The Request.QueryString collection gives you access to yet another class of
variables – those passed via a FORM with it’s METHOD = “get.” However,
there is a limit to the amount of data that can be passed on via the QueryString
and you are expected to use a form for more data.