public static Admin AdminLogin(string keyword, string password)
        {
            var context = new DataContext();
            var account = context.Admins.Where(x => x.AdminName == keyword.Trim()).FirstOrDefault();

            if (account != null)
            {
                var result = DeCrypt.VerifyPassWord(password, account.Password, account.Salt);
                if (!result)
                {
                    return(null);
                }
                HttpContext.Current.Session[cookieName] = account;

                HttpCookie cookie = new HttpCookie(cookieName, account.AdminName);
                HttpContext.Current.Response.Cookies.Add(cookie);
                HttpCookie cookie2 = new HttpCookie(tokenName, account.AdminName.ToMD5() + account.Password);
                HttpContext.Current.Response.Cookies.Add(cookie2);

                return(account);
            }
            else
            {
                return(null);
            }
        }
        public static string UserLogin(string keyword, string password)
        {
            var userService = new Model.DataContext();


            var account = userService.Users.First(a => a.UserName == keyword.Trim());

            if (account != null)
            {
                var result = DeCrypt.VerifyPassWord(account.Password, password, account.Salt);
                if (!result)
                {
                    return(null);
                }

                if (account.Token == null)
                {
                    account.Token                    = Guid.NewGuid().ToString("N");
                    account.LastLoginTime            = DateTime.Now;
                    userService.Entry(account).State = EntityState.Modified;
                    userService.SaveChanges();
                }
                else
                {
                    ////如果想实现同一账号同一时间只能一处登录,就用开放以下这段代码
                    //string key = prefixKey + account.Token;
                    //MvcCore.Extensions.CacheExtensions.ClearCache(key);
                    account.Token                    = Guid.NewGuid().ToString("N");
                    account.LastLoginTime            = DateTime.Now;
                    userService.Entry(account).State = EntityState.Modified;
                    //MvcCore.Unity.Get<Data.Service.ISysDBTool>().Commit();
                }

                var token = Login(account.Token);

                return(token);
            }
            return(null);
        }