用反射机制实例化工厂实现数据库操作
using System;
using System.Collections.Generic;
using System.Text;
using System.Configuration;
using System.Data.Common;
namespace DataAccess
{
//
//根据要求取得具体品牌的产品,读取配置文件,用反射机制实例化具体的工厂,并获取具体产品
//
class DbManager
{
DBManagerAbstractFactory dBManagerAbstractFactory = null;
string dbType = "";
string connectionText="";
//
//构造方法,读取工厂名字和数据库连接文本,用反射机制实例化具体的工厂
//
public DbManager()
{
dbType = ConfigurationSettings.AppSettings["dbType"];//读取配置文件
connectionText = ConfigurationSettings.AppSettings["connectionText"];//读取配置文件
try
{
Type type = Type.GetType(dbType, true);//通过类名获取类
dBManagerAbstractFactory = (DBManagerAbstractFactory)Activator.CreateInstance(type);//反射机智实例化具体工厂
}
catch (TypeLoadException e)
{
Console.WriteLine(e.Message);
}
}
public DbConnection GetConnection()
{
DbConnection con = dBManagerAbstractFactory.GetConnection();
con.ConnectionString = connectionText;
return con;
}
public DbDataAdapter GetDataAdapter()
{
return dBManagerAbstractFactory.GetDataAdapter();
}
}
}
using System.Collections.Generic;
using System.Text;
using System.Configuration;
using System.Data.Common;
namespace DataAccess
{
//
//根据要求取得具体品牌的产品,读取配置文件,用反射机制实例化具体的工厂,并获取具体产品
//
class DbManager
{
DBManagerAbstractFactory dBManagerAbstractFactory = null;
string dbType = "";
string connectionText="";
//
//构造方法,读取工厂名字和数据库连接文本,用反射机制实例化具体的工厂
//
public DbManager()
{
dbType = ConfigurationSettings.AppSettings["dbType"];//读取配置文件
connectionText = ConfigurationSettings.AppSettings["connectionText"];//读取配置文件
try
{
Type type = Type.GetType(dbType, true);//通过类名获取类
dBManagerAbstractFactory = (DBManagerAbstractFactory)Activator.CreateInstance(type);//反射机智实例化具体工厂
}
catch (TypeLoadException e)
{
Console.WriteLine(e.Message);
}
}
public DbConnection GetConnection()
{
DbConnection con = dBManagerAbstractFactory.GetConnection();
con.ConnectionString = connectionText;
return con;
}
public DbDataAdapter GetDataAdapter()
{
return dBManagerAbstractFactory.GetDataAdapter();
}
}
}