Passing variables to pages etc....

dodgyone · Mar 16, 2001

Please could somebody give me an example of setting a variable and then on the upcoming page(s) have code to receive the variable and perform an action.

I have a simple login screen (only needs to be pretty simple as not too sensitive) and on the secure pages I would like to send the variable to every one I access. I would like to enter the asp code by where if the variable does not exist on the page (in the asp code) then the person is redirected to the login page and so on. In other words every page takes the variable and then passes it on to the next secure page accessed.

I hope this makes sense.... Thanks

Marcus

DougP · Mar 16, 2001

First is the Login form
-----------------------
<html>
<%@ Language=VBScript %>
<head>
<meta http-equiv="Content-Language" content="en-us">
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>Login</title>
</head>

<body>
<form action="tableof.asp" method=get>

<p align="center"><font size="5">Distributor Login Form</font></p>

<p align="center">       Login <input type="text" name="login" size="20"></p>
<p align="center">Password <input type="text" name="password" size="20"></p>
<p align="center"><input type="submit" value="Submit" name="LoginButton"><input type="reset" value="Reset" name="B2">  
</p>
<p align="center"><font size="2">Powered by SQL Server 7<br><br>
written by: Douglas Poston<br>
<a href="mailto:dposton@universal1.com">dposton@universal1.com</a>
</font>
</p>
</form>
</body>
</html>
----------------------------------
Second is the accepting page
----------------------------------

<html><head>
<TITLE>Parts Lookup.asp</TITLE>
</head><body bgcolor="#FFFFFF">
<%pass=request.querystring("password&quot

%>
<br>
<%
Set Conn = server.CreateObject("ADODB.Connection&quot

Conn.Open "driver=SQL Server;server=yoursite.com;uid=user;pwd=pass;database=YourDatabase;"
Set RS1 = Conn.Execute("SELECT * From Customers Where [CUSTOMER] ='" & pass & "'&quot

%>
------------
This is looking up a password in a SQL server database
---------
The <input type="text" name="password" ... is the value being passed to the second page and it is received into
<%pass=request.querystring("password&quot

%> on the second page.

So the ...request.querystring("password&quot

... has to match exactly as the name of the text box on the first form.
DougP, MCP

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http://www.barcodeone.com

to see how Bar-codes can help you be more productive

dodgyone · Mar 17, 2001

Thanks for the code but I'm not really looking for anything that advanced.... I don't need to keep passwords in a database etc.

All I need is to be able to pass over the password and username variables from the login page onto the secure pages to check whether the person has logged in or not. For every secure page I would like to be able to check against the variable passed along etc (from the old page to the new page and so on along the chain).

Cheers for your help

Marcus

Pandyon · Mar 17, 2001

Use a session variable.

Upon login set Session("LoggedIn&quot

= True

Then before any HTML info on each member page check the value of Session("LoggedIn&quot

.

If Not Session("LoggedIn&quot

Then
Response.Redirect 'to a login page.
Else
' You're all clear.
End If.

Sort of like that.

Pandyon

dodgyone · Mar 18, 2001

Sorry, but could could you explain things a little further to me (I've not been using asp for long). Where does the code actually go on the page etc????

THIS IS ON THE FIRST PAGE:

<%
If Request.Form("login&quot

= "username" AND Request.Form("password&quot

= "password" Then
Response.Redirect "private.asp"
Else
If Request.Form("login&quot

<> "" AND Request.Form("password&quot

<> "" Then
Response.Redirect "AccessDenied.htm"
'Response.End
End If
End If
%>

RECEIVING PAGE:

Where does the code go... above <html> to receive straight away??????

Thanks for your patience...

Marcus

vasah20 · Mar 18, 2001

the Session("loggedin&quot

needs to go before you output anything to the browser. This way, you can redirect the user if they aren't logged in.

So - it should really be one of the first lines on your ASP script.

So the pages that the users need to login on would start something like this:

Code:

<%@ Language=VBscript%>
<%If not Session(&quot;LoggedIn&quot;) then
 Response.redirect &quot;private.asp&quot; 
End if
%>

The best way to do it is to put the if statement into a include, then include the pages on all the pages that need authentication.

Example:
contents of checkLogin.asp

Code:

<%If not Session(&quot;LoggedIn&quot;) then
 Response.redirect &quot;private.asp&quot; 
End if
%>

how to include a file

Code:

<!--#include file=&quot;checkLogin.asp&quot;-->

hope that helps
leo

gsc1ugs · Mar 19, 2001

Dont look anywhere else but session variables sort out the login on the login page then subsequent pages are thus:

If session("loggedin&quot

yepee!
else
go away
end if

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Passing variables to pages etc....

dodgyone

Technical User

DougP

MIS

dodgyone

Technical User

Pandyon

Programmer

dodgyone

Technical User

vasah20

Programmer

gsc1ugs

Programmer

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