加载Web应用程序后,Castle Windsor无法找到控制器。路径''的控制器未找到或未实现IController。当我查看内核(在CustomControllerFactory中)时,我看到所有控制器都已正确注册。
主MVC应用程序加载3个其他DLL。当我们直接在Visual Studio中引用DLL并加载插件类型时,它正在工作。但是当动态加载它时,它表示失败。当我请求URL时,传递给GetControllerInstance的上下文是正确的,但Type参数为null。
我使用Assembload.LoadFrom加载程序集。然后我检索Types foreach模块,它是Plugin的子类。这导致我有3种类型。
Assembly assembly = Assembly.LoadFrom(module);
Type pluginType = assembly.GetTypes()
.Single(x => x.IsSubclassOf(typeof(Plugin)));
然后我创建了一个插件实例,用于注册路由。
(IPlugin)Activator.CreateInstance(type))
的RegisterRoutes:
public static void RegisterRoutes(RouteCollection routes, IEnumerable<IPlugin> plugins)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
var pluginRouteDefaults = new {action = "Index", id = UrlParameter.Optional};
foreach (var plugin in plugins)
{
var context = new AreaRegistrationContext(plugin.Area, routes);
context.MapRoute(plugin.Area, $"{plugin.Area}/{{controller}}/{{action}}/{{id}}", pluginRouteDefaults, plugin.GetControllerNamespaces().ToArray());
}
routes.MapRoute(
name: "Default",
url: "{area}/{controller}/{action}/{id}",
defaults: new { area = "Framework", controller = "Home", action = "Index", id = UrlParameter.Optional },
namespaces: new string[] { "Web.Framework.Controllers" }
);
}
CustomControllerFactory:
public class CustomControllerFactory : DefaultControllerFactory
{
private readonly IKernel _kernel;
public VlcControllerFactory(IKernel kernel)
{
this._kernel = kernel;
}
public override void ReleaseController(IController controller)
{
_kernel.ReleaseComponent(controller);
}
protected override IController GetControllerInstance(RequestContext context, Type controllerType)
{
if (controllerType == null)
{
return base.GetControllerInstance(context, controllerType);
}
try
{
return (IController)_kernel.Resolve(controllerType);
}
catch
{
return base.GetControllerInstance(context, controllerType);
}
}
}
注册控制器。执行此操作后,我可以看到在Visual Studio的“模块”窗口中加载了DLL。此外,AppDomain.CurrentDomain.GetAssemblies()表示已加载DLL。
container.Register(
Classes.FromThisAssembly().BasedOn<IController>().LifestyleTransient());
我找到Dll的MvcApplication类。
public class MvcApplication : System.Web.HttpApplication
{
protected void Application_Start()
{
var directories = Directory.GetDirectories("C:\Projects\main\modules").Where(x => !x.EndsWith("Framework"));
string subPath = GetSubPath();
List<Type> pluginTypes = GetPluginTypes(directories, subPath);
var plugins = GetIPlugins(pluginTypes);
Launcher.CreateWindsorContainer(plugins.ToArray());
}
private static List<IPlugin> GetIPlugins(List<Type> pluginTypes)
{
List<IPlugin> plugins = new List<IPlugin>{new MvcInstaller()};
pluginTypes.ForEach(type => plugins.Add((IPlugin) Activator.CreateInstance(type)));
return plugins;
}
private static List<Type> GetPluginTypes(IEnumerable<string> directories, string subPath)
{
List<Type> pluginTypes = new List<Type>();
foreach (string directory in directories)
{
string module = Directory.GetFiles(directory + subPath).SingleOrDefault(x => x.EndsWith("Plugin.dll"));
if (!string.IsNullOrEmpty(module))
{
Assembly assembly = Assembly.LoadFrom(module);
Type pluginType = assembly.GetTypes()
.Single(x => x.IsSubclassOf(typeof(Plugin)));
pluginTypes.Add(pluginType);
}
}
return pluginTypes;
}
private static string GetSubPath()
{
#if DEBUG
var subPath = @"\bin\Debug\";
#else
subPath = @"\bin\Release\";
#endif
return subPath;
}
}
当我省略此代码并直接引用其他Dll并执行以下操作时:
Launcher.CreateWindsorContainer(new PluginA(), new PluginB(), new MVCPlugin());
然后它完美无缺,但是在加载Dll时,控制器的解析失败了。为什么Castle Windsor在请求控制器时找不到类型?
答案 0 :(得分:3)
这里的问题不是控制器的Windsor分辨率。 DefaultControllerType.GetControllerType()
方法可能会返回null
,因为您没有将程序集添加到BuildManager
(使用BuildManager.AddReferencedAssembly(assembly)
)。请注意,您只能在应用程序启动前调用此方法,因此您需要使用[assembly:PreApplicationStartupMethod(typeof(...SomeType), "PublicStaticVoidMethodOnSomeType")
。