找不到表单验证的cookie

我有两个页面登录。asp和cookie.aspx

当用户登录时，应该创建一个cookie并重定向到cookie.aspx。当饼干。Aspx加载它来检查cookie是否存在。

这是我的登录名。Aspx登录码

protected void Login1_Authenticate(object sender, AuthenticateEventArgs e)
{
    userName = Login1.UserName;
    passWord = Login1.Password;
    athUser = DirectoryServicesProcessor.Verify_User(userName, passWord);
    if (athUser == true)
    {
        //FormsAuthentication.SetAuthCookie(userName, false);
        bool IsPersistentCookie = true;
        DateTime expirationDate = new DateTime();
        if (IsPersistentCookie)
            expirationDate = DateTime.Now.AddYears(1);
        else
            expirationDate = DateTime.Now.AddMinutes(300); 
        FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(
            1,
            userName,
            DateTime.Now,
            expirationDate,
            IsPersistentCookie,
            userName,
            FormsAuthentication.FormsCookiePath);
        string et = FormsAuthentication.Encrypt(ticket);
        HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, et);
        if (IsPersistentCookie)
            cookie.Expires = ticket.Expiration;
        cookie.Name = ".AUTH";
        cookie.Domain = ".mydomain.com";
        Response.SetCookie(cookie);
        Response.Cookies.Add(cookie);
        Response.Redirect("~/cookietest/cookie.aspx");
    }

这是我的cookie.aspx的页面加载

protected void Page_Load(object sender, EventArgs e)
{
    HttpCookie cookie = HttpContext.Current.Request.Cookies.Get(FormsAuthentication.FormsCookieName);
    if (cookie != null)
    {
        FormsAuthenticationTicket ticket = FormsAuthentication.Decrypt(cookie.Value);
        if (ticket != null)
        {
            WhatHappened.Text = "Found the cookie!";
        }
        else
        {
            Response.Redirect("../failure.aspx");
        }
    }
    else
    {
        Response.Redirect("../failure.aspx");
    }
}

我想知道为什么饼干。

谢谢!

cookie.Name = FormsAuthentication.FormsCookieName;