C# 在ASP.NET MVC 5中从数据库加载Razor视图

我们正在尝试在ASP.NETMVC5中开发一个企业CMS应用程序。用户需要从管理应用程序中创建新页面、更改现有页面内容或删除页面。另一个要求是，某些页面可以包含用Razor语法编写的自定义小部件

这两个要求导致我从数据库加载razor视图。我在谷歌上搜索了几个例子

第一个是扩展VirtualPathProvider，并在应用程序启动方法中使用下面的表达式注册它

受保护的无效应用程序\u Start（）
{
...
HostingEnvironment.RegisterVirtualPathProvider（新的MyVirtualPathProvider（））；
}

当我尝试运行这个时，它抛出下面的错误

[InvalidOperationException: The view at '~/Views/Home/Index.aspx' must derive from ViewPage, ViewPage, ViewUserControl, or ViewUserControl.] System.Web.Mvc.WebFormView.RenderView(ViewContext viewContext, TextWriter writer, Object instance) +180 System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer) +107 System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +291 System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult) +13 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +56 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +420 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +52 System.Web.Mvc.Async.c__DisplayClass2b.b__1c() +173 System.Web.Mvc.Async.c__DisplayClass21.b__1e(IAsyncResult asyncResult) +100 System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10 System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27 System.Web.Mvc.Controller.b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +13 System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29 System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49 System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +36 System.Web.Mvc.Controller.b__15(IAsyncResult asyncResult, Controller controller) +12 System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +22 System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49 System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +26 System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10 System.Web.Mvc.MvcHandler.b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +21 System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29 System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49 System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +28 System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9644097 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155 当指定的文件（例如/View/Home/Index.cshtml）位于文件系统中时，即使文件系统中没有任何内容，这种方法也可以工作。当我从文件系统中删除该文件时，会抛出下面的错误

[InvalidOperationException: The view 'Index' or its master was not found or no view engine supports the searched locations. The following locations were searched: ~/Views/Home/Index.cshtml ~/Views/Home/Index.vbhtml ~/Views/Shared/Index.cshtml ~/Views/Shared/Index.vbhtml] System.Web.Mvc.ViewResult.FindView(ControllerContext context) +382 System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +116 System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult) +13 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +56 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +420 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +52 System.Web.Mvc.Async.c__DisplayClass2b.b__1c() +173 System.Web.Mvc.Async.c__DisplayClass21.b__1e(IAsyncResult asyncResult) +100 System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10 System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27 System.Web.Mvc.Controller.b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +13 System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29 System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49 System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +36 System.Web.Mvc.Controller.b__15(IAsyncResult asyncResult, Controller controller) +12 System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +22 System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49 System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +26 System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10 System.Web.Mvc.MvcHandler.b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +21 System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29 System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49 System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +28 System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9644097 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155 [InvalidOperationException:未找到视图“索引”或其主视图，或者没有视图引擎支持搜索的位置。搜索了以下位置： ~/Views/Home/Index.cshtml ~/Views/Home/Index.vbhtml ~/Views/Shared/Index.cshtml ~/Views/Shared/Index.vbhtml] System.Web.Mvc.ViewResult.FindView（ControllerContext上下文）+382 System.Web.Mvc.ViewResultBase.ExecuteResult（ControllerContext上下文）+116 System.Web.Mvc.ControllerActionInvoker.InvokeActionResult（ControllerContext ControllerContext，ActionResult ActionResult）+13 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive（IList`1过滤器、Int32过滤器索引、ResultExecutingContext预文本、ControllerContext ControllerContext、ActionResult ActionResult）+56 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive（IList`1过滤器、Int32过滤器索引、ResultExecutingContext预文本、ControllerContext ControllerContext、ActionResult ActionResult）+420 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters（ControllerContext ControllerContext，IList`1过滤器，ActionResult ActionResult）+52 System.Web.Mvc.Async.c__显示类2B.b__1c（）+173 System.Web.Mvc.Async.c__显示Class21.b__1e（IAsyncResult asyncResult）+100 System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate（IAsyncResult asyncResult）+10 System.Web.Mvc.Async.WrappedAsyncResultBase`1.End（）+49 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction（IAsyncResult asyncResult）+27 System.Web.Mvc.Controller.b_u1d（IAsyncResult asyncResult，ExecuteCorerate innerState）+13 System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate（IAsyncResult asyncResult）+29 System.Web.Mvc.Async.WrappedAsyncResultBase`1.End（）+49 System.Web.Mvc.Controller.EndExecuteCore（IAsyncResult asyncResult）+36 System.Web.Mvc.Controller.b_u15（IAsyncResult asyncResult，Controller-Controller）+12 System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate（IAsyncResult asyncResult）+22 System.Web.Mvc.Async.WrappedAsyncResultBase`1.End（）+49 System.Web.Mvc.Controller.EndExecute（IAsyncResult asyncResult）+26 System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute（IAsyncResult asyncResult）+10 System.Web.Mvc.MvcHandler.b_uu5（IAsyncResult asyncResult，ProcessRequestState innerState）+21 System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate（IAsyncResult asyncResult）+29 System.Web.Mvc.Async.WrappedAsyncResultBase`1.End（）+49 System.Web.Mvc.MvcHandler.EndProcessRequest（IAsyncResult asyncResult）+28 System.Web.Mvc.MvcHandler.System.Web.IHTTPassynchandler.EndProcessRequest（IAsyncResult结果）+9 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute（）+9644097 System.Web.HttpApplication.ExecuteStep（IExecutionStep步骤，布尔值&同步完成）+155 RazorViewEngine会尝试在文件系统中查找文件，即使您重写VirtualPathProvider以从数据库加载视图数据

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我想这些示例在ASP.NETMVC的早期版本中是有效的（我认为是2或3）。我得到的最好的解决方案是从头开始编写一个自定义视图引擎，但是要使它像razor视图引擎一样工作，还有很多工作要做。有没有其他技巧可以让这些示例发挥作用，或者有其他替代方法？

看看这些链接。希望这能有所帮助