Newbie question - passing variables (aka why this work?)

I spent a few hours in vain trying to pass the value of a html text box to a coldfusion page 2nd via the URL (query string).

However, it seems that I can't do this because the 2nd page seems to be able to reference the value in box of text in any case.  My question is: is this a coincidence, or is this the normal procedure, things work?  When I click the "Run report" button, everything I typed in the text box appears on the screen of page2.cfm.  I thought I should pass this value somehow (via the variables session or the URL string or something).

So my newbie question is: is this the way it should work (a simple answer Yes or no is fine)A text from one box. CFM file can reference the value of text box on the other. CFM page? Thanks in advance

Here is the page 1 (page1.cfm):

<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional / / BY" > ".
< html >
< body >

" < CFform action = ' http://www.mywebsite.com/page2.cfm "method ="get"> "
Cust ID: < cfinput type = "text" name = "CustomerID" >
< input type = value = "run report" >

< / CFFORM >
< / body >
< / html >

Page 2 (page2.cfm) here which works fine and shows what I typed in the text box:

< CFOUTPUT >
#CUSTID #.
< / CFOUTPUT >

I was already typing this until Ian replied. But I may as well post it in case it helps...

> I spent a few hours * in vain * trying to pass the
> value of a html to a coldfusion page 2nd text box via the
> URL (query string).

If you know that he or she is actually what you 're doing.

"> http://www.mywebsite.com/page2.cfm" method = "get" >
> Cust ID:

When you use method = "get", the form field, the variables are passed in the query string. So, if you enter "abc" in the text box, the URL submitted will be:

http://www.mywebsite.com/page2.cfm? CustID = abc

So 'CustomerID' will be available as a variable within the scope of the URL on page 2.

> * Here's page 2 (page2.cfm) which works fine and shows
> what I typed in the text box: *.
>
> #CUSTID #.
>

The reason for which he works is a little magic CF. The variable #custID # not be bounded, CF search this variable in a predefined list of staves (see link below). It looks in each of them, and uses the first value it finds. Although not the exact search order, CF will check the

http://livedocs.Adobe.com/ColdFusion/8/Variables_32.html
-VARIABLES in scope (at the time..)
-Reach URL (at the time..)
-FORM scope (at the time..)
... etc...

In your case, the variable exists in the scope of the URL. If your code is equivalent to saying

#url. CUSTOMERID #.

It is in fact a practice better coding. Although the original code works without the scope of variables, providing an explicit framework is more efficient and avoids unitentional errors.  For example if the code on page 2:


     #CUSTID #.

... the output may not be what you would expect ;-)

So to answer the question: Yes, that's what must happen.  However, you must explicitly scope your variables page 2 IE use #url.custID #.

Tags: ColdFusion

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