您可以使用一个MasterControllerFactory
,其中包含每个区域的所有IControllerFactory
实现,并知道哪个工厂可以构建哪个工厂。这实际上允许您为任何变体选择不同的ControllerFactory,而不仅仅是按区域。以下是它的工作方式:
所有的区域控制器工厂实现都必须实现IFilteredControllerFactory
而不是IControllerFactory
。那就是:
public interface IFilteredControllerFactory:IControllerFactory
{
bool CanHandle(RequestContext requestContext);
}
用于过滤基于区域名称实现的一个例子是这样的:
public class Area51ControllerFactory:IFilteredControllerFactory
{
public bool CanHandle(RequestContext requestContext)
{
return requestContext.RouteData.DataTokens["area"].ToString().ToLowerInvariant() == "area51";
}
public IController CreateController(RequestContext requestContext, string controllerName)
{
// create a controller...
}
public void ReleaseController(IController controller)
{
// release the controller...
}
}
然后,你需要的MasterControllerFactory
,它看起来像这样:
public class MasterControllerFactory : DefaultControllerFactory
{
private readonly List<IFilteredControllerFactory> _slaveFactories;
public MasterControllerFactory()
{
_slaveFactories = new List<IFilteredControllerFactory>();
}
public void RegisterFactory(IFilteredControllerFactory slaveFactory)
{
if(slaveFactory!=null && !_slaveFactories.Contains(slaveFactory))
{
_slaveFactories.Add(slaveFactory);
}
}
public override IController CreateController(RequestContext requestContext, string controllerName)
{
var factory = _slaveFactories.FirstOrDefault(x => x.CanHandle(requestContext));
if(factory!=null)
{
return factory.CreateController(requestContext, controllerName);
}
return base.CreateController(requestContext, controllerName);
}
public override void ReleaseController(IController controller)
{
bool released = false;
if (controller is Controller)
{
var requestContext = ((Controller) controller).ControllerContext.RequestContext;
var factory = _slaveFactories.FirstOrDefault(x => x.CanHandle(requestContext));
if (factory != null)
{
factory.ReleaseController(controller);
released = true;
}
}
if(!released)base.ReleaseController(controller);
}
}
在您的global.asax
的Application_Start中,您仍然需要设置所有内容,但这很容易。
var masterControllerFactory = new MasterControllerFactory();
masterControllerFactory.Register(new Area51ControllerFactory());
ControllerBuilder.Current.SetControllerFactory(masterControllerFactory);
显然,您可以通过多种方式来调整这种方法,以便最适合您的编码风格和应用程序体系结构。
哦,是的,你可以;-) – smartcaveman 2011-03-20 06:25:36
@smartcaveman:谢谢你离开这个评论 - 通过这样做你让我1)学习新的东西2)upvoting你=) – 2011-03-21 03:38:17