¼Ü¹¹B/SËÄ DALFactory Êý¾Ý·ÃÎʲã Data Access Layer

2008-04-10 09:45 //*******FactoryManage.cs using System;
using System.Reflection;
using System.Configuration;
using CoalTraffic.IDAL; namespace CoalTraffic.DALFactory
{
    /// <summary>
    /// ³éÏ󹤳§Ä£Ê½´´½¨DAL¡£
    /// web.config ÐèÒª¼ÓÈëÅäÖãº(ÀûÓù¤³§Ä£Ê½+·´Éä»úÖÆ+»º´æ»úÖÆ,ʵÏÖ¶¯Ì¬´´½¨²»Í¬µÄÊý¾Ý²ã¶ÔÏó½Ó¿Ú)
    /// DataCacheÀàÔÚµ¼³ö´úÂëµÄÎļþ¼ÐÀï
    /// ¿ÉÒÔ°ÑËùÓÐDALÀàµÄ´´½¨·ÅÔÚÕâ¸öDataAccessÀàÀï
    /// <appSettings>
    /// <add key="DAL" value="LiTianPing.SQLServerDAL" /> (ÕâÀïµÄÃüÃû¿Õ¼ä¸ù¾Ýʵ¼ÊÇé¿ö¸ü¸ÄΪ×Ô¼ºÏîÄ¿µÄÃüÃû¿Õ¼ä)
    /// </appSettings>
    /// </summary>
    public sealed class DataAccess
    {
        private static readonly string path = System.Configuration.ConfigurationManager.AppSettings["DAL"];         #region CreateObject         //²»Ê¹Óûº´æ
        private static object CreateObjectNoCache(string path, string CacheKey)
        {
            try
            {
                object objType = Assembly.Load(path).CreateInstance(CacheKey);
                return objType;
            }
            catch (Exception ex)