Poll problem

T

TheMagician

Newcomer
Joined
Nov 11, 2003
Messages
7
Hey guys

I have set up an intranet site with a Poll on it. Everything works fine and it records the votes in a database and that all works fine as well. The problem is I want to restrict people to only voting once. Log-in isn't an option, but I am using cookies to identify those that have voted when they open the page afresh. However the loophole is that if you vote and then press back on the browser, you can then vote again. I really don't know how to stop this happening?

Is it possible to capture the "back" event? How else could this be managed?

Any ideas would be muchly appreciated :)

Cheers
Ian

EDIT: I'm using ASP.net with vb.net code behind.
 
Are you checking the cookie for a vote on Page Load or just before setting the vote count? If you are checking on page load then this event will not occur when the user press's the back button on the browser.

Somthing like below will work regardless of pressing back

Code: 
        ' Checking vote cookie
        If (Not Request.Cookies("Vote") Is Nothing) Then
            ' Do nothing vote already taken
        Else
            Dim HTTPCookie As New HttpCookie("Vote")
            HTTPCookie.Expires = Now.AddDays(365)
            Response.Cookies.Add(HTTPCookie)
            ' Do add vote code
        End If

Regards

Andy
 
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