public int Update(Obj_DanhHieu obj)
        {
            SQLiteCommand cm = new SQLiteCommand(DbAccess.DatabaseConnection);

            cm.CommandType = CommandType.Text;
            cm.CommandText = "UPDATE " + LocalTable.TableName + " SET " +
                             "nam = @nam, " +
                             "danhHieu = @danhHieu, " +
                             "trangThai = @trangThai " +
                             "WHERE id = @id";
            cm.Parameters.Add(new SQLiteParameter("@nam", obj.Nam));
            cm.Parameters.Add(new SQLiteParameter("@danhHieu", obj.DanhHieu));
            cm.Parameters.Add(new SQLiteParameter("@trangThai", obj.TrangThai));
            cm.Parameters.Add(new SQLiteParameter("@id", obj.ID));

            DbAccess.OpenConnection();
            int i = cm.ExecuteNonQuery();

            DbAccess.CloseConnection();

            if (i == 1)
            {
                foreach (DataRow item in LocalTable.Rows)
                {
                    if ((long)item["id"] == obj.ID)
                    {
                        item["nam"]       = obj.Nam;
                        item["danhHieu"]  = obj.DanhHieu;
                        item["trangThai"] = obj.TrangThai;
                        break;
                    }
                }
            }

            return(i);
        }