public void CapNhat(ThongTinQuan tt0)
        {
            try
            {
                ThongTinQuan tt = db.ThongTinQuan.Find("0");
                if (tt != null)
                {
                    tt.TenQuan = tt0.TenQuan;
                    tt.DiaChi  = tt0.DiaChi;
                    tt.SDT     = tt0.SDT;
                    tt.Email   = tt0.Email;
                    tt.HinhAnh = tt0.HinhAnh;

                    db.SaveChanges();
                }
            }
            catch
            {
            }
        }
        public void CapNhat(string TenQuan, string DiaChi, string SDT, string Email, byte[] HinhAnh)
        {
            try
            {
                ThongTinQuan tt = db.ThongTinQuan.Find("0");
                if (tt != null)
                {
                    tt.TenQuan = TenQuan;
                    tt.DiaChi  = DiaChi;
                    tt.SDT     = SDT;
                    tt.Email   = Email;
                    tt.HinhAnh = HinhAnh;

                    db.SaveChanges();
                }
            }
            catch
            {
            }
        }