Detecting whether client has disabled cookies

[davearia]

Hi All,

 

I need help in detecting whether client has disabled cookies. I have tried this code:

Request.Browser.Cookies()

But this returns true whether cookies are disabled or not.

 

Please help.

 

Thanks, Dave.

[kahlua001]

Write a test cookie, redirect them to a page where it checks for this cookie. If it is there, then they can accept cookies from you.

[davearia]

Here is an update

 

I have come up with this code in the main default.aspx:

If Session("isPostBack") <> "True" Then
   Session("successfulLogin") = "False"
   Response.Cookies("TestCookie").Value = "ok"
   Response.Cookies("TestCookie").Expires = _
       DateTime.Now.AddMinutes(1)
   Response.Redirect("TestForCookies.aspx?redirect=" & _
       Server.UrlEncode(Request.Url.ToString))
End If

With this code in TestForCookies.aspx:

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
       Dim redirect As String = Request.QueryString("redirect")
       Dim acceptsCookies As String
       ' Was the cookie accepted?
       If Request.Cookies("TestCookie") Is Nothing Then
           Session("cookiesEnabled") = "False"
           Response.Cookies("TestCookie").Expires = _
              DateTime.Now.AddDays(-1)
       Else
           session("cookiesEnabled") = "True"
           Response.Cookies("TestCookie").Expires = _
              DateTime.Now.AddDays(-1)
       End If
       Session("isPostBack") = "True"
       Response.Redirect("Default.aspx")
   End Sub

If I set my browser to accept cookies the code runs fine and I get the True value I expected. However, if I set my browser to disable cookies, the app crashes right at the start. Even though I have set custom errors off in my web.config and I have set up global.asax to send me the latest error. Despite this I just get the screen: The page cannot be displayed .

 

Please help.

 

Thanks, Dave.

[kahlua001]

Not sure what the page cannot be displayed problem is. But if you disable cookies, then

 

Session("isPostBack")

 

would not work since asp.net established your unique session with it via a cookie.