asp.net Mvc 动态创建Controller

2021-06-19 15:06

阅读：607

标签：prot 路由规则 getc ted nbsp pat value bbb optional

有这么个需求，Urls如下：

http://localhost:52804

http://localhost:52804/home/test

http://localhost:52804/test1

http://localhost:52804/test1/aaa

http://localhost:52804/test1/bbb

http://localhost:52804/test2/aaa

http://localhost:52804/test2/bbb

第1和2条url是代表真实存在Controller的，后面的都是需要动态生成Controller的，为了实现这样的需求，通过查找资料，可以重写DefaultControllerFactory实现。步骤和代码如下：

1、新建FolderControllerFactory.cs继承自DefaultControllerFactory

 public class FolderControllerFactory : DefaultControllerFactory
    {
        public override IController CreateController(RequestContext requestContext, string controllerName)
        {
            var controllerType = GetControllerType(requestContext, controllerName);
            // 如果controller不存在，替换为FolderController
            if (controllerType == null)
            {
                // 用路由字段动态构建路由变量
                var dynamicRoute = string.Join("/", requestContext.RouteData.Values.Values);
                controllerName = "Folder";
                controllerType = GetControllerType(requestContext, controllerName);
                requestContext.RouteData.Values["Controller"] = controllerName;
                requestContext.RouteData.Values["action"] = "Index";
                requestContext.RouteData.Values["dynamicRoute"] = dynamicRoute;
            }            
            IController controller = GetControllerInstance(requestContext,controllerType);
            return controller;
        }
    }

2、新建FolderController

public class FolderController : Controller
    {
        // GET: Folder
        public ActionResult Index(string dynamicRoute)
        {            
            string viewFile = "/Views/" + dynamicRoute + ".cshtml";
            return View(viewFile);
        }
    }

3、修改路由规则

 public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
            routes.MapRoute(
                name: "Default",
                url: "{controller}/{action}/{id}",
                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
            );
            routes.MapRoute(
                "CatchAll",
                "{*dynamicRoute}",
                new { controller = "Folder", action = "Index" }
            );
        }

4、在Global.asax注册自定义的FolderControllerFactory

protected void Application_Start()
        {
            ControllerBuilder.Current.SetControllerFactory(new FolderControllerFactory());
            AreaRegistration.RegisterAllAreas();            
            RouteConfig.RegisterRoutes(RouteTable.Routes);
        }

5、在Views下新建一些文件夹和View作为测试，如图：

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