Webforms MasterPages & Cookie issues

Question

User-195907812 posted

Hi,

I'm trying to remove a cookie in a page's code behind as follows:

            if (HttpContext.Current.Request.Cookies["WWW-Username"] != null)
            {
                HttpCookie cookie = HttpContext.Current.Request.Cookies["WWW-Username"];
                cookie.Expires = DateTime.UtcNow.AddYears(-1);
                HttpContext.Current.Response.Cookies.Add(cookie);
                HttpContext.Current.Request.Cookies.Remove("WWW-Username");
            }
			
            if (HttpContext.Current.Request.Cookies["WWW-Username"] != null)
            {
                string tmp = HttpContext.Current.Request.Cookies["WWW-Username"].Value.ToString();
            }			

Note that the second condition above is never met.

I then redirect the user to the homepage, where the master page's Page_Init event is called. However, once here the cookie still exists.

            if (HttpContext.Current.Request.Cookies["WWW-Username"] != null)
            {
                string tmp2 = HttpContext.Current.Request.Cookies["WWW-Username"].Value.ToString();
            }	

Note this condition IS met.

Am I missing something? I've checked my code and the cookie isn't re-created.

Many thanks

Answer 1

User-939850651 posted

Hi RageRiot,

According to your description, I created a simple example using the code you provided, and found that the problem you mentioned does exist.

I modified part of the code to fix this problem:

TestPage.aspx

<asp:Button runat="server" ID="btn" Text="GO TO HOME" OnClick="btn_Click" />

TestPage.aspx.cs

protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack) {
                HttpCookie cookie = new HttpCookie("WWW-Username");
                cookie.Value = "TestVaue";
                Response.Cookies.Set(cookie);
            }
        }

        protected void btn_Click(object sender, EventArgs e)
        {
            if (HttpContext.Current.Request.Cookies["WWW-Username"] != null)
            {
                HttpCookie cookie = HttpContext.Current.Request.Cookies["WWW-Username"];
                cookie = new HttpCookie("WWW-Username");
                cookie.Expires = DateTime.UtcNow.AddYears(-1);
                //HttpContext.Current.Response.Cookies.Add(cookie);
                HttpContext.Current.Response.Cookies.Set(cookie);
                HttpContext.Current.Request.Cookies.Remove("WWW-Username");
            }

            if (HttpContext.Current.Request.Cookies["WWW-Username"] != null)
            {
                string tmp = HttpContext.Current.Request.Cookies["WWW-Username"].Value.ToString();
            }
            Response.Redirect("home.aspx", false);
        }

Site.Master.cs

protected void Page_Load(object sender, EventArgs e) { }

protected void Page_Init(object sender, EventArgs e)
        {
            if (HttpContext.Current.Request.Cookies["WWW-Username"] != null)
            {
                string tmp2 = HttpContext.Current.Request.Cookies["WWW-Username"].Value.ToString();
                //Response.Write(tmp2);
            }
        }

And an empty page home.aspx with no code behind.

Hope this can help you.

Best regards,

Xudong Peng

Answer 2

User-195907812 posted

Great, it works. Thank you!