Session variable usage?

[McKirahan]

Is there a way to use a Session Variable to prevent
the successful resubmission of a form if the user
uses the Back button and tries to submit it again?

Thanks in advance.

[Curt_C [MVP]]

have a look on www.aspfaq.com
There are some good explanations of how to properly adjust for the back
buttons usage.

--
Curt Christianson
Site & Scripts: http://www.Darkfalz.com
Blog: http://blog.Darkfalz.com
"McKirahan" <Ne**@McKirahan.com> wrote in message
news:Ht********************@comcast.com...

Is there a way to use a Session Variable to prevent
the successful resubmission of a form if the user
uses the Back button and tries to submit it again?

Thanks in advance.

[Aaron [SQL Server MVP]]

Um, yeah. On the form page:

<%
if request.form("whatever") <> "" and not (session("already_submitted"))
then
' do your thing with the data
session("already_submitted") = true
else
' form was empty, or already submitted
end if
%>

--
Please post DDL, sample data and desired results.
See http://www.aspfaq.com/5006 for info.


"McKirahan" <Ne**@McKirahan.com> wrote in message
news:Ht********************@comcast.com...

Is there a way to use a Session Variable to prevent
the successful resubmission of a form if the user
uses the Back button and tries to submit it again?

Thanks in advance.

[Ray Costanzo [MVP]]

Yeah, you could do that if you want, I suppose.

<% If Session("AlreadySubmitted") = "" Then %>
<form method="post" action="yourpage.asp">
<% Else %>
Already submitted
<% End If %>

You'd want to use that in conjunction with anti-caching headers.

http://www.aspfaq.com/show.asp?id=2017
http://www.aspfaq.com/show.asp?id=2022

Ray at work

"McKirahan" <Ne**@McKirahan.com> wrote in message
news:Ht********************@comcast.com...

Is there a way to use a Session Variable to prevent
the successful resubmission of a form if the user
uses the Back button and tries to submit it again?

Thanks in advance.

[McKirahan]

"Ray Costanzo [MVP]" <my first name at lane 34 dot commercial> wrote in
message news:#3**************@TK2MSFTNGP09.phx.gbl...

Yeah, you could do that if you want, I suppose.

<% If Session("AlreadySubmitted") = "" Then %>
<form method="post" action="yourpage.asp">
<% Else %>
Already submitted
<% End If %>

You'd want to use that in conjunction with anti-caching headers.

http://www.aspfaq.com/show.asp?id=2017
http://www.aspfaq.com/show.asp?id=2022

Ray at work

Thanks to all; especially Ray as it was the "anti-caching headers"
approach that I needed.

I misstated my problem as I had solved that one yesterday;
I basically came up with Aaron's solution.

Today's problem was, basically, how to prevent the user from
backing in to a secure page after logging out.

[McKirahan]

"Aaron [SQL Server MVP]" <te*****@dnartreb.noraa> wrote in message
news:us**************@TK2MSFTNGP14.phx.gbl...

Um, yeah. On the form page:

<%
if request.form("whatever") <> "" and not (session("already_submitted")) then
' do your thing with the data
session("already_submitted") = true
else
' form was empty, or already submitted
end if
%>

--
Please post DDL, sample data and desired results.
See http://www.aspfaq.com/5006 for info.

I wondered why you added:

Please post DDL, sample data and desired results.
See http://www.aspfaq.com/5006 for info.

until I saw it was your response to "error message" so I'll ignore it :)

[Aaron [SQL Server MVP]]

> I wondered why you added:

Please post DDL, sample data and desired results.
See http://www.aspfaq.com/5006 for info.

It's just my signature. Most of my time is spent in the SQL Server groups,
where a gentle reminder is not enough to drive this point home. I figure
the more exposure this page gets, the fewer questions we'll get that start
with "I have this table with a couple of varchar columns..."

--
Please post DDL, sample data and desired results.
See http://www.aspfaq.com/5006 for info.