public int CheckUser(string username, string password, string role) { using (var db = new ThueDiaDB()) { if (role == "Manager") { var kq = db.Accounts.Where(x => x.AccountName == username && x.PassWord == password && x.Role == "Manager").ToList <Accounts>(); if (kq.Count() > 0) { return(1); } } if (role == "Clerk") { var kq = db.Accounts.Where(x => x.AccountName == username && x.PassWord == password && x.Role == "Clerk").ToList <Accounts>(); if (kq.Count() > 0) { return(2); } } return(0); } }