Question

所以，我在我的应用程序中设置了ASP成员资格。我还有一个单独的用户表来管理非会员相关数据。在用户管理期间，我需要确保我的应用程序查询两个表。我有以下控制器返回已批准用户的列表，但似乎必须有一个更简单的方法来实现这一点。有什么更好的方法呢？

        QuoteExchangeDB _db = new QuoteExchangeDB();

        [MyAuthorize(Roles = "Administrator")]
        public ActionResult Admin()
        {
            MembershipUserCollection agents = Membership.GetAllUsers();
            IEnumerable<MembershipUser> unfiltered = agents.Cast<MembershipUser>();
            var filtered = unfiltered.Where(u => u.IsApproved);
            List<User> users = new List<User>();
            foreach (var item in filtered)
            {
                if (item.IsApproved)
                {
                    Guid guid = (Guid)item.ProviderUserKey;
                    users.Add(_db.Users.Single(u => u.MembershipGuid.Equals(guid)));
                }
            }
            return View(users);
        }

Answer 1

看起来你可能想在LINQ中进行简单的连接。

var filtered = Membership.GetAllUsers().Cast<MembershipUser>().Where(u => u.IsApproved);

var users = from f in filtered
        join u in _db.Users on ((Guid)f.ProviderUserKey) equals u.MembershipGuid
        select u;

你甚至可以做出一个声明：

var users = from f in Membership.GetAllUsers().Cast<MembershipUser>()
    join u in _db.Users on ((Guid)f.ProviderUserKey) equals u.MembershipGuid
    where f.IsApproved
    select u;

编辑：鉴于我不确定如何将IEnumerable与IQueryable一起加入可能会影响事件/导致此实例中出现问题，here's a blog about doing that。

通过MembershipUserCollection过滤用户表

1 个答案: