C# definitely impossible to delete cookie with Firefox

Question

From a C# page, I can't delete a cookie on Firefox and Internet Explorer. I use the Expires changing method with works perfectely from on a Chrome browser...

I founs many way to delete cookies on the Internet, and in a last chance try, I execute them like this :

  protected void Page_Load(object sender, EventArgs e)
    {

        try
        {
            Response.Cookies["CDV_Id_User"].Value = "-1";
        }
        catch
        {

        }

        try
        {
            Request.Cookies["CDV_Id_User"].Value = "-1";
        }
        catch
        {

        }
        try
        {
            Response.Cookies["CDV_Id_User"].Expires = DateTime.Now.AddDays(-1);
        }
        catch
        {

        }
        try
        {
            Request.Cookies["CDV_Id_User"].Expires = DateTime.Now.AddDays(-1);
        }
        catch
        {

        }

        try
        {
            HttpContext.Current.Session.Abandon();
        }
        catch { }

        try
        {
            HttpContext.Current.Response.Cookies.Add(new HttpCookie("ASP.NET_SessionId", ""));
        }
        catch { }

        Session["id_user"] = null;

        Response.Redirect("~/Default.aspx", false);
    }

But even with execution of such many way to make the cookie CDV_Id_User expire, this NEVER works on Firefox... but only on Chrome...

HELP please ! :-)

Have you seen this? http://stackoverflow.com/questions/4205534/firefox-not-deleting-cookies?rq=1 Which refs this: http://stackoverflow.com/questions/777767/firefox-session-cookies — Wjdavis5, Apr 03 '16 at 18:01
I will check that point. However, the problem is that the code must work even if the tab enabled option is active ... ? Do you have a solution to be able to delete a cookie in these conditions ? — user1592596, Apr 04 '16 at 08:58

score 0 · Answer 1 · answered Apr 03 '16 at 18:06

0

Do you have Firefox's save your tabs enabled?

Firefox not deleting cookies

Firefox session cookies

Try disabling saving of tabs and firefox should clear things out when closed etc.

answered Apr 03 '16 at 18:06

Wjdavis5

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That's right, when I first close the tab where my cookie was declared (and so deleted), that works. The problem is for my customers : they don't have to know this "procedure"... is there a solution to delete cookie, even with this Firefox behaviour ? Thanks :) – user1592596 Apr 10 '16 at 08:38
Sure. You'll just have to ignore cookies older than X on the server side. – Wjdavis5 Apr 10 '16 at 10:51
The problem is that I use this method to save the identity of my users, when thay check the "remember me" checkbox. So, I need to have a "disconnect button" which delete the cookie by modifying the expiration date... if I ignore cookies older than X we don't have the possibility to disconnect before X time :( – user1592596 Apr 10 '16 at 18:03
So just append an element to the cookie : isDisconnected = true that gets set when they choose to disconnect. – Wjdavis5 Apr 13 '16 at 13:34
The problem is, that the cookie is never updated : if I set the value to "-1" with : Response.Cookies["CDV_Id_User"].Value = "-1"; the value of the cookie remain as it is... actually, when the cookie is created, it's impossible to change the value, or change, the expiry date... it's uncomprehensible ! – user1592596 Apr 13 '16 at 19:36

C# definitely impossible to delete cookie with Firefox

1 Answers1