想象一个MVC
在该解决方案中没有任何控制器的项目。我有同样的事情,想在运行时使用 aDefaultControllerFactory
然后在我Global.asax
的 by中注册它来创建控制器Autofac
。在这里,我有一个具有CreateController
方法的示例控制器工厂:
internal class CControllerFactory : DefaultControllerFactory
{
private readonly Dictionary<string, Func<RequestContext, IController>> _controllerMap;
public CControllerFactory()
{
List<IController> lstControllers = DependencyResolver.Current.GetServices<IController>().ToList();
_controllerMap = new Dictionary<string, Func<RequestContext, IController>>();
foreach (Controller contr in lstControllers)
{
string ctrName = contr.ControllerContext.RouteData.Values["Controller"].ToString();
_controllerMap.Add(ctrName, c => contr);
}
}
public override IController CreateController(RequestContext requestContext, string controllerName)
{
if (_controllerMap.ContainsKey(controllerName))
{
return _controllerMap[controllerName](requestContext);
}
else
throw new KeyNotFoundException(controllerName);
}
}
正如您在上面看到的,这一行:List<IController> lstControllers = DependencyResolver.Current.GetServices<IController>().ToList();
将获取使用IController
服务的控制器列表。但就我而言,解决方案中不存在控制器。我想在运行时创建一个新控制器并将其添加到我的_controllerMap
.
所以我将代码更改为:
internal class CControllerFactory : DefaultControllerFactory
{
private readonly Dictionary<string, Func<RequestContext, IController>> _controllerMap;
public CControllerFactory()
{
// *Don't need this*
// List<IController> lstControllers = DependencyResolver.Current.GetServices<IController>().ToList();
_controllerMap = new Dictionary<string, Func<RequestContext, IController>>();
// *Don't need this Foreach*
// foreach (Controller contr in lstControllers)
// {
string ctrName = "Home";
// But what about contr in this line?!?!:
_controllerMap.Add(ctrName, c => contr);
// }
}
public override IController CreateController(RequestContext requestContext, string controllerName)
{
if (_controllerMap.ContainsKey(controllerName))
{
return _controllerMap[controllerName](requestContext);
}
else
throw new KeyNotFoundException(controllerName);
}
}
那么contr
在指定行呢?此参数的类型必须为Func<RequestContext,IController>
。如何通过 C# 代码在功能上创建它?