pmfactory.cs

这是一个gps的数据读写器。大家可以借鉴学习一下。

using System;
using System.Data;
using System.Data.SqlClient;
namespace DAT
{
	/// <summary>
	/// abstract class for SqlParameter factory
	/// </summary>
	abstract public class  PMFactory
	{
		/// <summary>
		/// This is the super class of PMFactory_In and PMFactory_Out
		/// which are responsible for creating various kind of SqlParameters.
		/// This pattern corresponds  to the pattern 揳bstract factory