ASP.. NET MVC 6控制器工厂
本文关键字:控制器 工厂 MVC NET ASP | 更新日期: 2023-09-27 18:02:40
我想从数据库(ASP. net)创建控制器的动作。. NET MVC 6 vNext)。我有表控制器和动作action表的属性为"{ ViewPath, ActionName }
",其中"actionName"为"{Controller}/{ActionName}
"我想建立这样的页面。我怎样才能做到呢?我有MVC 4类,但我需要重写为MVC 6
public class ITSDefaultController : DefaultControllerFactory
{
public override IController CreateController(System.Web.Routing.RequestContext requestContext, string controllerName)
{
try
{
return base.CreateController(requestContext, controllerName) as Controller;
}
catch (Exception)
{
Controller controller = new ITSControllerBase();
using (var db = new ITS.Database.DatabaseDataContext())
{
string action = requestContext.RouteData.Values["action"] as string;
DynamicAction dynamicAction = null;
if (!db.Controllers.Any(x => x.ControllerName == controllerName && x.Views.Any(v => v.ViewName == action)))
{
dynamicAction = Actions["NotFound"].First();
requestContext.RouteData.Values["controller"] = "NotFound";
requestContext.RouteData.Values["action"] = "Index";
}
else
{
dynamicAction = new DynamicAction()
{
ActionName = db.Views.First(d => d.ViewName == action && d.Controller.ControllerName == controllerName).ViewName,
Result = () => new ViewResult()
};
}
if (dynamicAction != null)
{
controller.ActionInvoker = new DynamicActionInvoker() { DynamicAction = dynamicAction };
}
return controller;
}
}
}
public override void ReleaseController(IController controller)
{
base.ReleaseController(controller);
}
public static ConcurrentDictionary> Actions = new ConcurrentDictionary>();
}
实际上我有同样的需要替换Mvc管道组件的一些自定义的,我发现IControllerFactory和IControllerActivator及其默认实现仍然是相同的,然后的经验是用CustomControllerFactory取代Mvc 6 DefaultControllerFactory,我已经做了一些测试在ConfigureServices上的启动类:
public void ConfigureServices(IServiceCollection services)
{
services.AddMvc();
var serviceDescriptor = services.FirstOrDefault(s => s.ServiceType.FullName.Contains("IControllerFactory"));
var serviceIndex = services.IndexOf(serviceDescriptor);
services.Insert(serviceIndex, new ServiceDescriptor(typeof(IControllerFactory), typeof(CustomControllerFactory), ServiceLifeTime.Singleton));
services.RemoveAt(serviceIndex + 1);
}
就完成了,您还可以向IServiceCollection接口添加一个扩展方法:
public static class ServiceCollectionExtensions
{
public static void(this IServiceCollection services, Type serviceType, Type implementationType, ServiceLifetime serviceLifetime = ServiceLifetime.Singleton)
{
var serviceDescriptor = services.FirstOrDefault(s => s.ServiceType == serviceType);
var serviceIndex = services.IndexOf(serviceDescriptor);
services.Insert(serviceIndex, new ServiceDescriptor(serviceType, implementationType, serviceLifetime));
services.RemoveAt(serviceIndex + 1);
}
}
修改后的可以像这样简单地使用:
......
services.AddMvc();
services.ReplaceService(typeof(IControllerActivator), typeof(CustomControllerActivator));
services.ReplaceService(typeof(IControllerFactory), typeof(CustomControllerFactory));
......
,然后你可以替换Mvc 6管道上的任何组件;
public class HomeController : Controller
{
public string _MyName { get; set; }
// GET: Home
public ActionResult Index()
{
return Content(_MyName);
}
public HomeController(string Name)
{
_MyName = Name;
}
}
public class MyCustomController : IControllerFactory
{
public IController CreateController(RequestContext requestContext, string controllerName)
{
HomeController objHomeController = new HomeController("Any thing Which you want to pass/inject.");
return objHomeController;
}
public SessionStateBehavior GetControllerSessionBehavior(RequestContext requestContext, string controllerName)
{
return SessionStateBehavior.Default;
}
public void ReleaseController(IController controller)
{
IDisposable disposable = controller as IDisposable;
if(disposable!=null)
{
disposable.Dispose();
}
}
}
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
RouteConfig.RegisterRoutes(RouteTable.Routes);
ControllerBuilder.Current.SetControllerFactory(new MyCustomController());
}