MySqlConnection conn = new MySqlConnection(SqlConnnectString);MySqlCommand cmd = new MySqlCommand("SELECT * FROM `TB_CM_Log` WHERE ID = ?ID LIMIT 1", conn);cmd.Parameters.AddWithValue("ID", id);cmd.CommandType = CommandType.Text;cmd.Parameters.Clear();TB_CM_Log model = new TB_CM_Log();if (conn.State != ConnectionState.Open)     conn.Open();using (MySqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection){      while (dr.Read())      {             model.ID = dr.GetString(0);             model.ModType = dr.GetInt32(1);             model.ModTypeName = dr.GetString(2);             model.SourcesType = dr.GetString(3);             model.Description = dr.GetString(4);             model.OperatorID = dr.GetInt32(5);             model.OperatorName = dr.GetString(6);             model.SucFlag = dr.GetInt32(7);             model.OperaTime = dr.GetDateTime(8);             model.IP = dr.IsDBNull(9) ? "" : dr.GetString(9);             model.ResultDes = dr.IsDBNull(10) ? "" : dr.GetString(10);       }}conn.Close();