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Preventing user from going back to previous page.
- Thread starter gust1480
- Start date
DotNetGnat
Programmer
here are the options..select one...
put this in the head tags
or
or
-DNG
put this in the head tags
Code:
<script language="javascript">
window.history.forward(1);
</script>or
Code:
<body onLoad="history.go(+1)">or
Code:
<script>
function KeyCache() {
if (window.event && window.event.keyCode == 8) {
window.event.keyCode = 123; //Replaces with F12 button. (Does nothing in IE)
}
}
document.onkeydown=KeyCache();
</script>-DNG
Look into Cache control to ensure the page expires immediately (and the browser/proxy doesn't cache it).
Then track the progress in a session variable, and ensure the user is always directed to the correct position they need to be...e.g.:
Page1.asp - Old Page
Page2.asp - Old Page
Page3.asp - Current Page
Page4.asp - Not yet seen
Session("MultiStepFormPagePosition") = 3
on each page check current page index against the session variable, and response.redirect them to the correct page if they're not already there.
This should stop users in the same session from either seeing a cached previous page by hitting their back button or by requesting a new page (e.g. typing the previous pages url in again).
You might want to ensure that the final page clears the session variable, so they can go through the process again (if that's what you want).
If you only EVER want users to visit a page once (weird requirement, but you never know - and your request is a little vague) then you will need to keep a history of the visited pages in a persistent data store of some sort. If it is just for that session, then you can again use the session variable to keep a history of pages.
Hope that helps,
A smile is worth a thousand kind words. So smile, it's easy!
DNG,
With options 1 and 2, if the user was to select the second from last (i.e. 2 pages ago) from the back button dropdown, then they would get the previous page, not the latest page.
Option 3 has so many potential issues I won't even comment.
Besides, they all rely on Javascript - which not all users will have enabled.
A smile is worth a thousand kind words. So smile, it's easy!
trollacious
Programmer
Set a session variable for the current page name at the end of the ASP processing. At the beginning of the script, check to see what the page name is against an array of page names, and if the page name isn't the previous one in the array, redirect to the next one in the array. This can be an INCLUDE file so any changes made only need to be done in one file. Something like this:
Lee
Code:
Dim pagenames, thispage, pageindex
pagenames = new Array("page1.asp", "page2.asp", "page3.asp", "page4.asp")
'thispage = get this page URL from server variables
pageindex = 0
While pagenames(pageindex) <> Session("pagename")
pageindex = pageindex + 1
Wend
If thispage <> pagenames(pageindex + 1) Then
Response.Redirect pagenames(pageindex + 1)
End If
Session("pagename") = thispage
'rest of pageLee
Bullschmidt
Programmer
A1ien51's disable the Back Button
What is going to happen, is when the page loads, it will send the surfer to the last page in their history.
Now if a person tries to go back to it, then it will send them directly back to the page they pushed the back button on!
Add this code to the header of your page:
<script>
history.forward();
</script>
JPS: Thus need to put the code on the page you don't want the user to be able to go back to.
And here is my version of it:
<script type="text/javascript"> <!--
// Disable browser's Back button on another pg being able to go back to this pg.
history.forward();
//-->
</script>
Best regards,
-Paul
- Freelance Web and Database Developer
- Classic ASP Design Tips
What is going to happen, is when the page loads, it will send the surfer to the last page in their history.
Now if a person tries to go back to it, then it will send them directly back to the page they pushed the back button on!
Add this code to the header of your page:
<script>
history.forward();
</script>
JPS: Thus need to put the code on the page you don't want the user to be able to go back to.
And here is my version of it:
<script type="text/javascript"> <!--
// Disable browser's Back button on another pg being able to go back to this pg.
history.forward();
//-->
</script>
Best regards,
-Paul
- Freelance Web and Database Developer
- Classic ASP Design Tips
- Status
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