//---------页面表现层Web----------------------
Product product = new Product();
IList productsByCategory = product.GetProductsByCategory((string)ViewState[KEY_CATEGORY]);
//----------业务逻辑层---------------------
namespace PetShop.BLL
public class Product
{
IProduct dal = PetShop.DALFactory.Product.Create();
return dal.GetProductsBySearch(keywords);
}
//---------接口层--------------------------
namespace PetShop.IDAL
{
public interface IProduct
{
IList GetProductsByCategory(string category);
}
}
//------------数据访问层--------------------
public class Product : IProduct
{
public IList GetProductsByCategory(string category) {
}
}
//----------静态工厂方法--------------------
namespace PetShop.DALFactory
{
public class Product
{
public static PetShop.IDAL.IProduct Create()
{
string path = System.Configuration.ConfigurationSettings.AppSettings["WebDAL"];
string className = path + ".Product";
return (PetShop.IDAL.IProduct)Assembly.Load(path).CreateInstance(className);
}
}
}