CreatingCookieEventArgs.CustomCredential Property

You use the CustomCredential property to retrieve custom values in the authentication ticket. The CustomCredential property contains the value passed to the Login method. Typically, this property is used to pass custom values that must be validated with the user name and password, such as an identification number. If more than one value is stored in the property, you must parse the CustomCredential property in order to retrieve values.

The following example shows an event handler for the CreatingCookie event. The handler retrieves user values from the CreatingCookieEventArgs object in order to customize the authentication cookie. The value passed in the CustomCredential property is stored in the UserData property of the forms authentication ticket.

Note
Store the CustomCredential property in a cookie only when you know that the data in the property is not sensitive. Malicious users can access the values in the cookie.

void AuthenticationService_CreatingCookie(object sender, 
    System.Web.ApplicationServices.CreatingCookieEventArgs e)
{
    FormsAuthenticationTicket ticket = new
          FormsAuthenticationTicket
            (1,
             e.UserName,
             DateTime.Now,
             DateTime.Now.AddMinutes(30),
             e.IsPersistent,
             e.CustomCredential,
             FormsAuthentication.FormsCookiePath);

    string encryptedTicket =
         FormsAuthentication.Encrypt(ticket);

    HttpCookie cookie = new HttpCookie
         (FormsAuthentication.FormsCookieName,
          encryptedTicket);
    cookie.Expires = DateTime.Now.AddMinutes(30);

    HttpContext.Current.Response.Cookies.Add(cookie);
    e.CookieIsSet = true;
}

.NET Framework

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference