使用 VirtualPathProvider 从 DLL 加载 ASP.NET MVC 视图



基于这里的这个问题并使用此处找到的代码,我正在尝试加载作为嵌入式资源的视图在单独的 DLL 项目中,原始问题的作者说他已经成功地做到了这一点 - 但我无法让它工作,因为似乎 MVC 视图引擎正在拦截请求并且仍在查看视图的文件系统。例外:

Server Error in '/' Application.
The view 'Index' or its master could not be found. The following locations were searched:
~/Views/admin/Index.aspx
~/Views/admin/Index.ascx
~/Views/Shared/Index.aspx
~/Views/Shared/Index.ascx
~/App/Views/admin/Index.aspx
~/App/Views/admin/Index.ascx
~/App/Views/Shared/Index.aspx
~/App/Views/Shared/Index.ascx 

我正在使用一个CustomViewEngine,比如罗伯康纳利的/App 结构,如下所示:

public class CustomViewEngine : WebFormViewEngine
    {
         public CustomViewEngine()
         {
             MasterLocationFormats = new[] { 
                "~/App/Views/{1}/{0}.master", 
                "~/App/Views/Shared/{0}.master" 
                };
             ViewLocationFormats = new[] { 
                "~/App/Views/{1}/{0}.aspx", 
                "~/App/Views/{1}/{0}.ascx", 
                "~/App/Views/Shared/{0}.aspx", 
                "~/App/Views/Shared/{0}.ascx" 
                };
             PartialViewLocationFormats = ViewLocationFormats;
         }
    }

以下是我的路线:

    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
    routes.MapRoute("Home", "", new {controller = "Page", action = "Index", id = "Default"});
    routes.MapRoute("Default", "Page/{id}", new { controller = "Page", action = "Index", id = "" });
    routes.MapRoute("Plugins", "plugin/{controller}/{action}", new { controller = "", action = "Index", id = "" });
    routes.MapRoute("Error", "{*url}", new { controller = "Error", action = "ResourceNotFound404" });

在我的AssemblyResourceProvider中,我正在检查路径是否~/plugin/开始,然后使用 dll 文件名约定plugin.{controller}.dll

有什么建议吗?

更新:当路由的http://localhost/plugin/admin请求到达VirtualFileProvider时,它最后没有任何附加的视图。因此,在VirtualFileProvider的 Open 方法中,~/plugin/admin的虚拟路径在应该按照我上面的路由中定义的~/plugin/admin/Index.aspx时被传入。我是否搞砸了我的路线,或者我期待这种情况发生是对的?

  1. 必须在Global.asax Application_Start处理程序中注册VirtualPathProvider
  2. 必须使用特殊路径调用 DLL 中的视图,如下所示:return View("~/Plugin/YOURDLL.dll/FULLNAME_YOUR_VIEW.aspx");

下面是一篇包含可下载代码示例的文章,演示了这一点:

http://www.wynia.org/wordpress/2008/12/aspnet-mvc-plugins/

内置的WebFormsViewEngine使用VirtualPathProviders,因此如果您编写VPP并注册它,则无需对视图引擎进行任何更改。

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