Expiring a page to control the use of the Back button
I'm trying to expire pages in my application so when a user clicks the back button they will be forced to refresh.
I have the code:
Response.Expires = -1
Response.CacheControl = "no-cache"
in the page_load, outside of the postback handling, but it isn't giving me the results I expected (I have seen this used on an application that I worked on for a previous employer).
When I clicked the back button, I was expecting to get a message saying "Warning: Page has expired. Please click retry to refresh or cancel" (or something like that).
So, I'm not sure if I'm missing something or what?
make sure this is at top of page:
Response.CacheControl = "no-cache" 'no-cache
Response.Expires = 0
and throw in:
<META HTTP-EQUIV="PRAGMA" CONTENT="NO-CACHE">
I added the meta tag and checked that the response properties/methods were the same as what you suggested, but it still didn't work.
Is there a property in the @ Page directive that I may need?
Here is what it is right now:
<%@ Page Language="vb" AutoEventWireup="false" SmartNavigation="True" Codebehind="myPage1.aspx.vb" Inherits="myApp.myPage1" %>
(I tried removing SmartNavigation, but it didn't help either).
Is there anything in the Web.Config that would affect this?
I've done some more testing. I think I'm just not seeing the results that I'm expecting - WHEN I'm expecting them.
I was thinking that I would see the Page Expiration message when I went back from one page to another, but I don't. Right now, I'm seeing the Expiration message when I'm on a page and I go back after I've handled an IndexChanged event for a radio button.
The other page that I'm working with has frames and I suspect that might be part of the reason why the page is not expiring or not expiring when I expect it to.
Same Error(Expiration Page)
I got the same error. Can you tell me who do you doing or some one resolve that problem. I 'm trying to resolve, but nothing works. I added meta tag's(HTML) and code behid(set response) and configuring IIS(HTTP Headers). I only need seeing the Expiration message when I'm on a page and I go back.
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