当用户登录到我的网站时，我会执行以下操作

帐号控制器

public ActionResult Login(LoginModel model,string returnUrl)
{
    if (ModelState.IsValid)
    {
        User user = _userService.GetUser(model.Email.Trim());

        //Create Pipe Delimited string to store UserID and Role(s)
        var userData = user.ApplicantID.ToString();

        foreach (var role in user.UserRoles)
        {
            userData = userData + "|" + role.description;
        }

        _formAuthService.SignIn(user.ApplicantFName,false,userData);

        return RedirectToAction("Index","Portfolio");
        }

        return View(model);
    }

FormsAuthenticationService

public class FormsAuthenticationService : IFormsAuthenticationService
{
    public void SignIn(string userName,bool createPersistentCookie,string UserData)
    {
        if (String.IsNullOrEmpty(userName)) throw new ArgumentException("Value cannot be null or empty.","userName");

        // Create and tuck away the cookie
        FormsAuthenticationTicket authTicket = new FormsAuthenticationTicket(1,userName,DateTime.Now,DateTime.Now.AddDays(15),createPersistentCookie,UserData);
        // Encrypt the ticket.
        string encTicket = FormsAuthentication.Encrypt(authTicket);

        //// Create the cookie.
        HttpCookie faCookie = new HttpCookie(FormsAuthentication.FormsCookieName,encTicket);
        HttpContext.Current.Response.Cookies.Add(faCookie);
    }
}

Global.asax中

protected void Application_AuthenticateRequest(Object sender,EventArgs e)
{

    // Get the authentication cookie
    string cookieName = FormsAuthentication.FormsCookieName;
    HttpCookie authCookie = Context.Request.Cookies[cookieName];

    // If the cookie can't be found,don't issue the ticket
    if (authCookie == null) return;

    // Get the authentication ticket and rebuild the principal
    // & identity
    FormsAuthenticationTicket authTicket = FormsAuthentication.Decrypt(authCookie.Value);

    string[] UserData = authTicket.UserData.Split(new Char[] { '|' });

    GenericIdentity userIdentity = new GenericIdentity(authTicket.Name);
    GenericPrincipal userPrincipal = new GenericPrincipal(userIdentity,UserData);
    Context.User = userPrincipal;

}

此代码在我以前的MVC 3应用程序中运行良好，但在MVC 4应用程序中，在Razor View中，以下代码似乎没有访问IsInRole属性来执行角色检查

@if (HttpContext.Current.User.IsInRole("Applicant"))
{
    <p>text</text>
}

再次，这在我的MVC 3应用程序中完美地工作。

有没有人有任何想法或建议，为什么这不会与我的MVC 4应用程序？

任何帮助深表感谢。

谢谢。

额外信息

我的MVC 4应用程序正在使用.Net Framework 4.0

下面的截图显示了我的General Principal，它被分配给Context.User。您可以看到，对于该用户，m_roles包含两个字符串，即UserID(100170)及其角色(申请人)。但是由于某种原因，IsInRoles不能在我的MVC 4 Razor View中访问或看到，但是它可以在我的MVC 3 Razor View中。