工厂模式的实例解读:
工厂模式的解读:
#region 店铺详情
/// <summary>
/// Supporters the detail.
/// </summary>
/// <returns></returns>
public ActionResult ShopDedail()
{
return View();
}
public ActionResult ShopDedailHelper()
{
ShopBussiness shop = new ShopBussiness();
IDictionary<string, string> pageParmas = PageParams();
Carpa.Web.Script.IHashObject Page = new Carpa.Web.Script.HashObject();
Carpa.Web.Script.IHashObjectList list = shop.GetShopList();
Page["rows"] = list;
return Json(Page, "text/html", JsonRequestBehavior.AllowGet);
}
#endregion
第一步:
//public IDictionary<string, string> PageParams = null;
public virtual IDictionary<string, string> PageParams()
{
//取得页面查询参数(总是以key:value方式存取,可以看做两条链表存储)
IDictionary<string, string> PageParams = new Dictionary<string, string>();
foreach (string sky in Request.QueryString.AllKeys)
{
PageParams.Add(sky,Request.QueryString[sky]);
}
return PageParams;
}
//取得页面查询参数(总是以key:value方式存取,可以看做两条链表存储)
//页面即是对象(数据+控件)
第二步:
public IHashObjectList GetShopList()
{
//返回值为HashObjectList是为了得到json数据源
using (DbHelper db = IProgram.Utils.AppUtils.CreateDbHelper())
{
//连接数据库(任意形式)
IProgram.Base.BaseService iserver = null;
//晚期实例化子类为超类或者接口对象,那么ContextListDataFactory应该返回IBaseData 或其子类型的对象
//而且看起来像是一座工厂对应一个类,因此ListDataFactoryType是个标志的集合(枚举集合,字符串集合,位集合等等)
第三步:
IListData list = IProgram.DAL.DataFactory.ContextListDataFactory(DAL.ListDataFactoryType.ShelvesGoodsListData);
//以上只是便于扩展,对于解决具体的问题,并不是必须的,
//then,在创建的实例中,可以进行各种各样的操作
第四步:
list._DbHelper = db;
iserver = new IProgram.BLL.ShopService(list);
int totalRecord = -1;
IHashObjectList ilist = iserver.FindHashList(new HashObject(), 0, 10, ref totalRecord);
if (ilist == null) return ilist;
foreach (IHashObject objRowData in ilist)
{
//objRowData["goodsname"] = "<td thid='th4' align='left' style='width: 150px;'><div class='tableText' style='width: 150px;'><a href='javascript:;' onmouseout='hideDiv()' onmouseover='showDiv(4)'>" + objRowData.GetValue<string>("goodsname") + "</a></div></td>";
}
return ilist;
}
第三步:
public static IBaseData ContextBaseFactory(string className)
{
if (string.IsNullOrEmpty(className))
{
throw new ArgumentNullException("参数className 数据工厂为空。");
}
className = string.Format("IProgram.DAL.{0}", className);
//取得全名,准备动态创建类
Type type = SysUtils.GetAssembly("IProgram.DAL").GetType(className);
if (type == null)
{
throw new Exception(string.Format("【{0}】数据工厂对象未定义或命名空间不正确！", className));
}
return (IBaseData) Activator.CreateInstance(type);
//动态创建,格式化成基础类型+工作类型
}
第四步:
namespace IProgram.DAL
{
public enum ListDataFactoryType
{
CtgListData = 0,
DeptListData = 1,
ShelvesGoodsListData = 2,
}
}
以上就是对工厂模式的理解.
