asp.net Oracle数据库访问操作类(3)

/// <summary>
    /// 构建 OracleCommand 对象(用来返回一个结果集，而不是一个整数值)
    /// </summary>
    /// <param>数据库连接</param>
    /// <param>存储过程名</param>
    /// <param>存储过程参数</param>
    /// <returns>OracleCommand</returns>
    private static OracleCommand BuildQueryCommand(OracleConnection connection, string storedProcName, IDataParameter[] parameters)
    {
        OracleCommand command = new OracleCommand(storedProcName, connection);
        command.CommandType = CommandType.StoredProcedure;
        foreach (OracleParameter parameter in parameters)
        {
            if (parameter != null)
            {
                // 检查未分配值的输出参数,将其分配以DBNull.Value.
                if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
                    (parameter.Value == null))
                {
                    parameter.Value = DBNull.Value;
                }
                command.Parameters.Add(parameter);
            }
        }
        return command;
    }

    #endregion

#region 事务处理