MVC4 中 ApiController 的 ControllerFactory

Question

我有一个已经存在 MVC 控制器的 ASP.NET MVC 4.0 项目，但是我想使用 ApiController 类来实现一些新功能。

现有的控制器工厂返回一个IController 对象，ApiController 不继承自该对象。为ApiController 派生控制器创建另一个控制器工厂并使两个工厂共存的最佳方法是什么？

ControllerBuilder.Current.SetControllerFactory((IControllerFactory)new BuilderControllers.BuilderControllerFactory());

public class BuilderControllerFactory :IControllerFactory
{
    public IController CreateController(RequestContext requestContext, string controllerName)
    {
        string controllerType = string.Format("BuilderControllers.{0}Controller", controllerName);
        IController controller = null;
        try
        {
            controller = Activator.CreateInstance(Type.GetType(controllerType)) as IController;
        }
        catch (System.Exception x)
        {
            //-- handle any failed requests --
        }
        return controller;
    }
}

Answer 1

您在这里谈论不同类型的控制器，一种来自IController，另一种来自IHttpController。保留您现有的 MVC 控制器工厂并添加

GlobalConfiguration.Configuration.Services.Replace(typeof(IHttpControllerActivator),new MyControllerActivator());
        GlobalConfiguration.Configuration.Services.Replace(typeof(IHttpControllerSelector),new MyControllerSelector());

public class MyControllerActivator : IHttpControllerActivator
{
    public IHttpController Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)
    {
        throw new NotImplementedException();
    }
}
public class MyControllerSelector : IHttpControllerSelector
{
    public HttpControllerDescriptor SelectController(HttpRequestMessage request)
    {
        return new HttpControllerDescriptor() {ControllerName="SomeController",ControllerType=typeof(MyApiController),Configuration=GlobalConfiguration.Configuration};
    }

    public IDictionary<string, HttpControllerDescriptor> GetControllerMapping()
    {
        throw new NotImplementedException();
    }
}

你必须尝试这个想法才能得到你想要的。 这应该可以解决您的问题。但我仍然不明白你为什么要这样做，因为这会导致依赖注入问题。我会认为你有你的理由。