我从来没有使用IoC容器与WebForms,所以得到这个作为一些高层次的解决方案,应该可能进一步改进。
你可以尝试创造一些国际奥委会提供的单身:
public class IoCProvider
{
private static IoCProvider _instance = new IoCProvider();
private IWindsorContainer _container;
public IWindsorContainer
{
get
{
return _container;
}
}
public static IoCProvider GetInstance()
{
return _instance;
}
private IoCProvider()
{
_container = new WindsorContainer(new XmlInterpreter(new ConfigResource("castle")));
}
}
你web.config
必须包含的部段(该配置是基于你的previous post):
<configuration>
<configSections>
<section name="castle" type="Castle.Windsor.Configuration.AppDomain.CastleSectionHandler, Castle.Windsor" />
</configSections>
<castle>
<components>
<component id="DalLayer"
service="MyDal.IDalLayer, MyDal"
type="MyDal.MyDalLayer, MyDal"
lifestyle="PerWebRequest">
<!--
Here we define that lifestyle of DalLayer is PerWebRequest so each
time the container resolves IDalLayer interface in the same Web request
processing, it returns same instance of DalLayer class
-->
<parameters>
<connectionString>...</connectionString>
</parameters>
</component>
<component id="BusinessLayer"
service="MyBll.IBusinessLayer, MyBll"
type="MyBll.BusinessLayer, MyBll" />
<!--
Just example where BusinessLayer receives IDalLayer as
constructor's parameter.
-->
</components>
</castle>
<system.Web>
...
</system.Web>
</configuration>
这些接口的实现并且类可以看起来像:
public IDalLayer
{
IRepository<T> GetRepository<T>(); // Simplified solution with generic repository
Commint(); // Unit of work
}
// DalLayer holds Object context. Bacause of PerWebRequest lifestyle you can
// resolve this class several time during request processing and you will still
// get same instance = single ObjectContext.
public class DalLayer : IDalLayer, IDisposable
{
private ObjectContext _context; // use context when creating repositories
public DalLayer(string connectionString) { ... }
...
}
public interface IBusinessLayer
{
// Each service implementation will receive necessary
// repositories from constructor.
// BusinessLayer will pass them when creating service
// instance
// Some business service exposing methods for UI layer
ISomeService SomeService { get; }
}
public class BusinessLayer : IBusinessLayer
{
private IDalLayer _dalLayer;
public BusinessLayer(IDalLayer dalLayer) { ... }
...
}
比你能定义基类为您的网页,并暴露业务层(你可以做同样的与任何其他类可以解决):
public abstract class MyBaseForm : Page
{
private IBusinessLayer _businessLayer = null;
protected IBusinessLayer BusinessLayer
{
get
{
if (_businessLayer == null)
{
_businessLayer = IoCProvider.GetInstance().Container.Resolve<IBusinessLayer>();
}
return _businessLayer;
}
...
}
复杂的解决方案对子级涉及使用自定义PageHandlerFactory
直接解决网页和注入依赖关系。如果你想使用这样的解决方案,请检查Spring.NET框架(带IoC容器的另一个API)。
谢谢拉迪斯拉夫。如果可以的话,我会+10! – Kamyar 2011-01-07 17:46:27