相关疑难解决方法(0)

哪个会更快.

1)循环datareader并基于填充的数据表创建自定义行和列

2)或者创建一个dataAdapter对象并且只是(填充)一个数据表.

在动态创建数据表时,数据加载器的性能是否仍然适用？

这个问题是我之前的问题的延续.在没有涉及太多细节的情况下,我正在用2个相关的1对多表填充数据集.所以,我现在的问题是 - 为什么这段代码运作良好

public DataAgencyR_DataSet SelectOne(int id)
{
    DataAgencyR_DataSet result = new DataAgencyR_DataSet();
    using (DbCommand command = Connection.CreateCommand())
    {
        try
        {               
            command.CommandText = SqlStrings.SelectDataAgencyR_SelectOne();

            var param = ParametersBuilder.CreateByKey(command, "ID_DeclAgenc", id, "ID_DeclAgenc");
            command.Parameters.Add(param);
            Connection.Open();
            using (DbDataReader reader = command.ExecuteReader())
            {
                while (reader.Read())
                {
                    System.Diagnostics.Trace.WriteLine(String.Format("{0}-{1}", reader[0], reader[1]));
                }
                System.Diagnostics.Trace.WriteLine("-------------");
                reader.NextResult();
                while (reader.Read())
                {
                    System.Diagnostics.Trace.WriteLine(String.Format("{0}-{1}", reader[0], reader[1]));
                }
            }

        }
        catch (DbException e)
        {
            Logger.Error(e.Message, e);
            throw new DataAccessException("Error occurs while SelectOne method porcessed", e);
        }
        finally
        {
            if (Connection.State != …