How to disable the back button in browser?

[mynkow]

I accept any other solution for this:
I have five pages for registrering users. But I don't want users to be able to go back using browser back button. For example: Fill Page1 and go to Page2 then Page3. If user clicks back button I want to redirect him to Page1.

[vinci]

I accept any other solution for this:
I have five pages for registrering users. But I don't want users to be able to go back using browser back button. For example: Fill Page1 and go to Page2 then Page3. If user clicks back button I want to redirect him to Page1.

this is possible by using javascript

<SCRIPT language="javascript">
          if(window.history.forward(1) != null)
          window.history.forward(1);
</SCRIPT>

just paste this code in the Head tags of your web

this wont disable the back button instead in just sends forward the page again when the back button is clicked.. it is because the browser saves the previous page and stores its memory in the history, so when the user clicks back and the page was already opened and already stored in history; thats when the condition (if statement) becomes true and forwards the page back...

enjoy!

[Shashi Sadasivan]

I accept any other solution for this:
I have five pages for registrering users. But I don't want users to be able to go back using browser back button. For example: Fill Page1 and go to Page2 then Page3. If user clicks back button I want to redirect him to Page1.

One way is to set the httpCachebility to false
so the client will not store any web history, and the back or the forward buttons wil not work.
PLace your own back buttons in the web page to redirect the user wherever they are to be redirected

Hope this helps

[mynkow]

This works only for IE. Any solution for Firefox, Opera, Safari and Netscape?
I tried this in PageLoad method:

Response.Buffer	=	true;
Response.ExpiresAbsolute=DateTime.Now.AddDays(-10);
Response.Expires =-15000;
Response.CacheControl = "no-cache";
if(Session["SessionID"] == null)
{
	Response.Redirect ("Page.aspx");
}

Not successful because when I click back button I cannot enter PageLoad Method and receive error page like 404. Seems like the browser is looking for the cache but cannot find it.

[Shashi Sadasivan]

Have you tried

Response.Cache.SetCacheability(HttpCacheability.NoCache)

Also have a look at :
http://forums.asp.net/t/1060173.aspx

http://www.codeproject.com/useritems/NoCaching.asp

[mynkow]

Yes, I tried. Still not working correctly.

[Shashi Sadasivan]

Yes, I tried. Still not working correctly.

got this from one of the forums

response.Cache.SetExpires(DateTime.Now.AddSeconds(  -60));
response.Cache.SetCacheability(HttpCacheability.No  Cache);
response.Cache.SetValidUntilExpires(false);
response.Expires = 0;
response.Cache.SetNoStore();
response.AppendHeader("Pragma", "no-cache");

[mynkow]

This works but If I have 1 or more postbacks don't.This is not a solution.

[mynkow]

OK
I use this for IE (not very good because you can disable Javascript in browser):

<script type="text/javascript">
if(window.histo ry.forward(1) != null)
window.history. forward(1);
</script>

and for Firefox,Safari, Netscape this code in the PageLoad() Method:

if( !Request.Browse r.Browser.ToStr ing().Equals( "IE" ) )
{
Response.Cache. SetExpires(Date Time.Now.AddSec onds( -60));
Response.Cache. SetCacheability (HttpCacheabili ty.NoCache);
Response.Cache. SetValidUntilEx pires(false);
Response.Expire s = 0;
Response.Cache. SetNoStore();
Response.Append Header("Pragma" , "no-cache");
}

This work with IE,Firefox,Safa ri and Netscape but not with Opera.
Any solution for Opera?

10x Shashi Sadasivan for the help.

[kbobce]

Just insert this within head :

<script type="text/javascript">
function noBack(){window .history.forwar d()}
noBack();
window.onload=n oBack;
window.onpagesh ow=function(evt ){if(evt.persis ted)noBack()}
window.onunload =function(){voi d(0)}
</script>

It works with IE, Firefox, Safari and Opera using cache of client.

[kbobce]

P.S. history.forward () method never has any parameter ;=)

[nmsreddi]

Hello Kbobce

i have tried by placing the script(what you have posted) in Head part of my web page ,but still it doesn't works any more to do after placing the script

[kbobce]

Hi,
Sorry I don't know why there's a space that came inside the script.
One should read :
window.onpagesh ow=function(evt ){if(evt.persis ted)noBack()}
Hoping this'll appear OK.
Regards

[kbobce]

Again ! Let's try to write it in another way :
<script type="text/javascript">
function noBack(){
window.history. forward()
}
noBack();
window.onload= noBack;
window.onpagesh ow=
function(evt){
if (evt.persisted) noBack()
}
window.onunload =
function(){
void(0)
}
</script>

[kbobce]

It's OK now.
No space inside "noBack"