App_Code/DB/Market/DataMarket.cs

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using System;
using System.Data;
using System.Data.SqlClient;

/// <summary>
/// 存储数据库中数据的类.
/// </summary>
/// <author>天志</author>
/// <log date="2007-09-01">创建</log>
sealed class DataMarket
{
    private DataMarket()
    {
        //
        // TODO: 在此处添加构造函数逻辑
        //
    }

    private static DataMarketMySQL mysql = null;
    private static DataMarketOracle oracle = null;

    private static DataMarketSQLServer sqlServer = null;


    private static DataMarketInterface DB
    {
        get
        {
            string dataBase = RegisterAccess.ReadKey("DBType");
            dataBase = dataBase.Trim();
            if (dataBase == "SQLSERVER2000" || dataBase == "SQLSERVER2005")
            {
                if (sqlServer == null)
                {
                    sqlServer = new DataMarketSQLServer();
                }
                return sqlServer; 
            }
            else if (dataBase == "ORACLE11G")
            {
                if (oracle == null)
                {
                    oracle = new DataMarketOracle();
                }
                return oracle; 
            }
            else
            {
                if (mysql == null)
                {
                    mysql = new DataMarketMySQL();
                }
                return mysql; 
            }
        }
    }

    public delegate void OnReConnect();

    public static OnReConnect ReConnect = null;