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Home > Archive > IIS ASP > March 2007 > why I need to click refresh button in order to see session values
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why I need to click refresh button in order to see session values
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| c676228 2007-03-20, 1:26 am |
| Hi all,
Recently, I just found out that our program behaves differently from before.
in our asp, in order to prevent data disppearing problem in form fields,we
use session variable to display the field values if a customer click "back"
button on the page2.asp in the browser,(the session variables
Session(aQuoteName(iPerson)&"TripCost") is set up in the page2.asp) i.e.
then in the page1.asp, we use:
<input name="<%=aQuoteName(iPerson)& "TripCost" %>" type="text" size="6"
value="<%=Session(aQuoteName(iPerson)&"TripCost")%>">
to display the tripcost. This works very well in the past all the time. But
today, when I do the similar programming, whenever I click "back" button on
page2.asp, the data on the page1.asp all disappeared and I have to click
"refresh" button on page1.asp in order to display all the session variables.
What's going on, does this have to have something to do with window security
patches, I didn't have anything changed in the program or IIS configuration.
I also test the production version, same thing happened which it never
happend before???
Can you shed a light on me?
--
Betty
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| Anthony Jones 2007-03-20, 7:26 am |
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"c676228" <bettys@community.nospam> wrote in message
news:35B705D9-961C-4B8D-BB33-EF62780D503D@microsoft.com...
> Hi all,
> Recently, I just found out that our program behaves differently from
before.
>
> in our asp, in order to prevent data disppearing problem in form fields,we
> use session variable to display the field values if a customer click
"back"
> button on the page2.asp in the browser,(the session variables
> Session(aQuoteName(iPerson)&"TripCost") is set up in the page2.asp) i.e.
> then in the page1.asp, we use:
> <input name="<%=aQuoteName(iPerson)& "TripCost" %>" type="text" size="6"
> value="<%=Session(aQuoteName(iPerson)&"TripCost")%>">
> to display the tripcost. This works very well in the past all the time.
But
> today, when I do the similar programming, whenever I click "back" button
on
> page2.asp, the data on the page1.asp all disappeared and I have to click
> "refresh" button on page1.asp in order to display all the session
variables.
> What's going on, does this have to have something to do with window
security
> patches, I didn't have anything changed in the program or IIS
configuration.
> I also test the production version, same thing happened which it never
> happend before???
> Can you shed a light on me?
Are you sure it was working before? The browser is not obliged to re-fetch
the previous page from the origin server when you hit the back button. In
fact in my experience it rarely does.
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| Steven Cheng[MSFT] 2007-03-20, 7:26 am |
| Hi Betty,
As for the behavior you mentioned, I've try testing it on my local side and
seems haven't been able to repro the exact same symptom. Have you tried
visiting that page from different client machine to see if you'll get the
consistent result?
One thing I could get is the client-browser caching, however, normally
client cache will also display the input values from previous view. Anyway,
you can try add the following like code snippet to disable client cache for
your input page to see whether it can help some.
============================
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<%
pStr = "private, no-cache, must-revalidate"
Response.ExpiresAbsolute = #2000-01-01#
Response.AddHeader "pragma", "no-cache"
Response.AddHeader "cache-control", pStr
%>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Untitled Page</title>
</head>
<body>
<form id="form1" method="post" action="test.asp">
<input id="Text1" name="Text1" type="text" value='<%= Session("Text1")
%>' />
<input id="Text2" name="Text2" type="text" value='<%= Session("Text2")
%>' />
<input id="Submit1" type="submit" value="submit" />
</form>
</body>
</html>
=============================
Sincerely,
Steven Cheng
Microsoft MSDN Online Support Lead
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