Asp.net mvc 3 自定义ViewEngine使用Razor引擎动态选择母版页

我正在尝试用Razor创建我的自定义ViewEngine。。。 我的代码是基于，唯一的区别，我使用剃须刀引擎

我有两个“母版”：

• _Admin.cshtml
• _Modal.cshtml

以及自定义ViewEngine中的FindView方法：

public override ViewEngineResult FindView(ControllerContext controllerContext, string viewName, string masterName, bool useCache)
{            
    if (controllerContext.HttpContext.Request.IsAjaxRequest())
        return base.FindView(controllerContext, viewName, "_Modal", useCache);
    return base.FindView(controllerContext, viewName, "_Admin", useCache);
}

通过调试，ViewEngineResult.View始终为空，并且生成的视图始终相同，无论母版页如何

如果我强制usecache=false，它将返回视图，但我得到了该错误：

“~/Views/Car/Index.cshtml”中的视图 必须从ViewPage派生， ViewPage、ViewUserControl或 ViewUserControl

[无效操作异常：“~/Views/Car/Index.cshtml”处的视图必须派生自ViewPage、ViewPage、ViewUserControl或ViewUserControl。]
System.Web.Mvc.WebFormView.RenderView（ViewContext、TextWriter、Object实例）+306227
System.Web.Mvc.buildmanager compiledview.Render（ViewContext、TextWriter）+115
System.Web.Mvc.ViewResultBase.ExecuteResult（ControllerContext上下文）+303
System.Web.Mvc.ControllerActionInvoker.InvokeActionResult（ControllerContext ControllerContext，ActionResult ActionResult）+13
System.Web.Mvc.c__显示Class1C.b__19（）+23
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter（IResultFilter筛选器，ResultExecutingContext预文本，Func`1 continuation）+260
System.Web.Mvc.c__DisplayClass1e.b__1b（）+19
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter（IResultFilter筛选器，ResultExecutingContext预文本，Func`1 continuation）+260
System.Web.Mvc.c__DisplayClass1e.b__1b（）+19
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter（IResultFilter筛选器，ResultExecutingContext预文本，Func`1 continuation）+260
System.Web.Mvc.c__DisplayClass1e.b__1b（）+19
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters（ControllerContext ControllerContext，IList`1过滤器，ActionResult ActionResult）+177
System.Web.Mvc.ControllerActionInvoker.InvokeAction（ControllerContext ControllerContext，String actionName）+343
System.Web.Mvc.Controller.ExecuteCore（）+116
System.Web.Mvc.ControllerBase.Execute（RequestContext-RequestContext）+97
System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute（RequestContext RequestContext）+10
System.Web.Mvc.c__显示类b.b__5（）+37
System.Web.Mvc.Async.c__显示类1.b__0（）+21
System.Web.Mvc.Async.c_uuudisplayClass8`1.b_uuu7（IAsyncResult）+12
System.Web.Mvc.Async.WrappedAsyncResult`1.End（）+62
System.Web.Mvc.c_uuudisplayClasse.b_uuud（）+50
System.Web.Mvc.SecurityUtil.b___0（操作f）+7
System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust（操作）+22
System.Web.Mvc.MvcHandler.EndProcessRequest（IAsyncResult asyncResult）+60
System.Web.Mvc.MvcHandler.System.Web.IHTTPassynchandler.EndProcessRequest（IAsyncResult结果）+9
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute（）+8841105
System.Web.HttpApplication.ExecuteStep（IExecutionStep步骤，布尔值&同步完成）+184

有什么帮助吗

---

谢谢

问题在于，您对两种不同类型的请求使用单个缓存。虽然它没有直接解决您的问题，但请看下面讨论类似问题的帖子：

对于例外情况，您可以发布堆栈跟踪吗

[InvalidOperationException: The view at '~/Views/Car/Index.cshtml' must derive from ViewPage, ViewPage<TModel>, ViewUserControl, or ViewUserControl<TModel>.]
   System.Web.Mvc.WebFormView.RenderView(ViewContext viewContext, TextWriter writer, Object instance) +306227
   System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer) +115
   System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +303
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult) +13
   System.Web.Mvc.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19() +23
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +260
   System.Web.Mvc.<>c__DisplayClass1e.<InvokeActionResultWithFilters>b__1b() +19
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +260
   System.Web.Mvc.<>c__DisplayClass1e.<InvokeActionResultWithFilters>b__1b() +19
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +260
   System.Web.Mvc.<>c__DisplayClass1e.<InvokeActionResultWithFilters>b__1b() +19
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +177
   System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +343
   System.Web.Mvc.Controller.ExecuteCore() +116
   System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +97
   System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10
   System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +37
   System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +21
   System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +12
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
   System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +50
   System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
   System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +60
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8841105
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184