MVC 3 授权自定义角色

我是 MVC 3 新用户，我正在尝试通过 SQL 数据库进行管理。 首先，我有客户实体，可以通过管理字段定义管理，该字段是客户实体中的布尔类型。 我只想在产品页面中访问管理员，而不是在普通客户中。 我想制作 [Authorize(Roles="admin")] 而不是 [Authorize]。 但是，我不知道如何在我的代码中真正发挥管理员角色。 然后在我的 HomeController 中，我编写了这段代码。

public class HomeController : Controller
{

    [HttpPost]
    public ActionResult Index(Customer model)
    {
        if (ModelState.IsValid)
        {
            //define user whether admin or customer
            SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["rentalDB"].ToString());
            String find_admin_query = "SELECT admin FROM Customer WHERE userName = '" + model.userName + "' AND admin ='true'";
            SqlCommand cmd = new SqlCommand(find_admin_query, conn);
            conn.Open();
            SqlDataReader sdr = cmd.ExecuteReader();
            //it defines admin which is true or false
            model.admin = sdr.HasRows;
            conn.Close();

            //if admin is logged in
            if (model.admin == true) {
                Roles.IsUserInRole(model.userName, "admin"); //Is it right?
                if (DAL.UserIsVaild(model.userName, model.password))
                {
                    FormsAuthentication.SetAuthCookie(model.userName, true);
                    return RedirectToAction("Index", "Product");
                }
            }

            //if customer is logged in
            if (model.admin == false) {
                if (DAL.UserIsVaild(model.userName, model.password))
                {
                    FormsAuthentication.SetAuthCookie(model.userName, true);                   
                    return RedirectToAction("Index", "Home");
                }
            }
                ModelState.AddModelError("", "The user name or password is incorrect.");
        }
        // If we got this far, something failed, redisplay form
        return View(model);
    }

DAL 类是

 public class DAL
{
    static SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["rentalDB"].ToString());

    public static bool UserIsVaild(string userName, string password)
    {
        bool authenticated = false;
        string customer_query = string.Format("SELECT * FROM [Customer] WHERE userName = '{0}' AND password = '{1}'", userName, password);      
        SqlCommand cmd = new SqlCommand(customer_query, conn);
        conn.Open();
        SqlDataReader sdr = cmd.ExecuteReader();
        authenticated = sdr.HasRows;
        conn.Close();
        return (authenticated);
    }
}

最后，我想定制 [Authorize(Roles="admin")]

[Authorize(Roles="admin")]
public class ProductController : Controller
{
  public ViewResult Index()
    {
        var product = db.Product.Include(a => a.Category);
        return View(product.ToList());
    }
}

这些是我现在的源代码。我需要创建“AuthorizeAttribute”类吗？ 如果我必须这样做，我该怎么做？你能给我解释一下吗？我不明白如何在我的案例中设定特定的角色。 请帮助我我该怎么办。谢谢。

我知道这个问题有点老了，但这是我做类似事情的方法。我创建了一个自定义授权属性，用于检查用户是否具有正确的安全访问权限：

[System.AttributeUsage(System.AttributeTargets.All, AllowMultiple = false, Inherited = true)]
public sealed class AccessDeniedAuthorizeAttribute : AuthorizeAttribute
{
    public override void OnAuthorization(AuthorizationContext filterContext)
    {
        base.OnAuthorization(filterContext);

        // Get the roles from the Controller action decorated with the attribute e.g.
        // [AccessDeniedAuthorize(Roles = MyRoleEnum.UserRole + "," + MyRoleEnum.ReadOnlyRole)]
        var requiredRoles = Roles.Split(Convert.ToChar(","));

        // Get the highest role a user has, from role provider, db lookup, etc.
        // (This depends on your requirements - you could also get all roles for a user and check if they have the correct access)
        var highestUserRole = GetHighestUserSecurityRole();

        // If running locally bypass the check
        if (filterContext.HttpContext.Request.IsLocal) return;

        if (!requiredRoles.Any(highestUserRole.Contains))
        {
            // Redirect to access denied view
            filterContext.Result = new ViewResult { ViewName = "AccessDenied" };
        }
    }
}

现在用自定义属性装饰控制器（您也可以装饰单个控制器操作）：

[AccessDeniedAuthorize(Roles="user")]
public class ProductController : Controller
{
    [AccessDeniedAuthorize(Roles="admin")]
    public ViewResult Index()
    {
        var product = db.Product.Include(a => a.Category);
        return View(product.ToList());
    }
}