無法投射「ASP._Page__ViewStart_cshtml」類型的對象來鍵入「System.Web.WebPages.StartPage」。錯誤

，我發現了無法轉換無法投射「ASP._Page__ViewStart_cshtml」類型的對象來鍵入「System.Web.WebPages.StartPage」。錯誤

類型的對象

ASP._Page__ViewStart_cshtml爲鍵入」 System.Web.WebPages.StartPage「

運行我的MVC應用程序

。

每一個答案，我發現，當搜尋告訴我，確保我_ViewStart文件是在我的查看文件夾，它是。更奇怪的是，我將我以前的Win 7 PC完全相同的項目文件複製到我的新Win 10筆記本電腦上。該應用程序在舊PC上運行良好，但在新筆記本電腦上出現上述錯誤。我也從Visual Studio 2015運行。

任何其他想法？

完整的錯誤消息：

[InvalidCastException: Unable to cast object of type 'ASP._Page__ViewStart_cshtml' to type 'System.Web.WebPages.StartPage'.] 
    System.Web.WebPages.StartPage.GetStartPage(WebPageRenderingBase page, String fileName, IEnumerable`1 supportedExtensions) +236 
    System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance) +163 
    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.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19() +23 
    System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +245 
    System.Web.Mvc.<>c__DisplayClass1e.<InvokeActionResultWithFilters>b__1b() +22 
    System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +176 
    System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +311 
    System.Web.Mvc.Controller.ExecuteCore() +105 
    System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +88 
    System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10 
    System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +34 
    System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +16 
    System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +10 
    System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50 
    System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +28 
    System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7 
    System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +23 
    System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +59 
    System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9 
    System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9765901 
    System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

Web配置在瀏覽文件夾：

<?xml version="1.0"?> 

<configuration> 
    <configSections> 
    <sectionGroup name="system.web.webPages.razor" type="System.Web.WebPages.Razor.Configuration.RazorWebSectionGroup, System.Web.WebPages.Razor, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> 
     <section name="host" type="System.Web.WebPages.Razor.Configuration.HostSection, System.Web.WebPages.Razor, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" /> 
     <section name="pages" type="System.Web.WebPages.Razor.Configuration.RazorPagesSection, System.Web.WebPages.Razor, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" /> 
    </sectionGroup> 
    </configSections> 

    <system.web.webPages.razor> 
    <host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> 
    <pages pageBaseType="System.Web.Mvc.WebViewPage"> 
     <namespaces> 
     <add namespace="System.Web.Mvc" /> 
     <add namespace="System.Web.Mvc.Ajax" /> 
     <add namespace="System.Web.Mvc.Html" /> 
     <add namespace="System.Web.Routing" /> 
     <add namespace="DevExpress.Utils" /> 
     <add namespace="DevExpress.Web.ASPxClasses" /> 
     <add namespace="DevExpress.Web.ASPxGridView" /> 
     <add namespace="DevExpress.Web.ASPxGridView.Export" /> 
     <add namespace="DevExpress.Web.ASPxEditors" /> 
     <add namespace="DevExpress.Web.ASPxCallbackPanel" /> 
     <add namespace="DevExpress.Web.ASPxMenu" /> 
     <add namespace="DevExpress.Web.ASPxNavBar" /> 
     <add namespace="DevExpress.Web.ASPxPopupControl" /> 
     <add namespace="DevExpress.Web.ASPxRoundPanel" /> 
     <add namespace="DevExpress.Web.ASPxSplitter" /> 
     <add namespace="DevExpress.Web.ASPxTabControl" /> 
     <add namespace="DevExpress.Web.ASPxTreeView" /> 
     <add namespace="DevExpress.Web.ASPxUploadControl" /> 
     <add namespace="DevExpress.Web.ASPxHtmlEditor" /> 
     <add namespace="DevExpress.Web.ASPxSpellChecker" /> 
     <add namespace="DevExpress.XtraCharts"/> 
     <add namespace="DevExpress.XtraCharts.Web" /> 
     <add namespace="DevExpress.XtraReports" /> 
     <add namespace="DevExpress.XtraReports.UI" /> 
     <add namespace="DevExpress.XtraReports.Web" /> 
     <add namespace="DevExpress.Web.Mvc" /> 
     <add namespace="DevExpress.Web.Mvc.UI" /> 
     </namespaces> 
    </pages> 
    </system.web.webPages.razor> 

    <appSettings> 
    <add key="ClientValidationEnabled" value="true"/> 
    <add key="UnobtrusiveJavaScriptEnabled" value="true"/> 
    <add key="DalManagerType" value="TimeTracker.DalEF.DalManager,TimeTracker.DalEF"/> 
    <add key="DalManagerTypeFMS" value="FMSv3.DALEF.DalManager,FMSv3.DALEF" /> 
    <add key="webpages:Enabled" value="false" /> 
    </appSettings> 

    <system.web> 
    <httpHandlers> 
     <add path="*" verb="*" type="System.Web.HttpNotFoundHandler"/> 
    </httpHandlers> 

    <!-- 
     Enabling request validation in view pages would cause validation to occur 
     after the input has already been processed by the controller. By default 
     MVC performs request validation before a controller processes the input. 
     To change this behavior apply the ValidateInputAttribute to a 
     controller or action. 
    --> 
    <pages 
     validateRequest="false" 
     pageParserFilterType="System.Web.Mvc.ViewTypeParserFilter, System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" 
     pageBaseType="System.Web.Mvc.ViewPage, System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" 
     userControlBaseType="System.Web.Mvc.ViewUserControl, System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> 
     <controls> 
     <add assembly="System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" namespace="System.Web.Mvc" tagPrefix="mvc" /> 
     </controls> 
    </pages> 
    </system.web> 

    <system.webServer> 
    <validation validateIntegratedModeConfiguration="false" /> 


    <handlers> 
     <remove name="BlockViewHandler"/> 
     <add name="BlockViewHandler" path="*" verb="*" preCondition="integratedMode" type="System.Web.HttpNotFoundHandler" /> 
    </handlers> 
    </system.webServer> 
</configuration>

來源

2017-05-04 Nick

如果您添加的代碼和會拋出異常的行什麼？ – Gusman

您的項目root/Views文件夾中有一個_ViewStart.cs文件，但仍然出現此錯誤？確保它沒有被拖入像Shared這樣的子文件夾中，這可能導致它無法找到。 – Chad

您是否在機器之間比較了.Net的版本？ –

案例1：

重組項目時，它的copy+paste錯誤。

解決方案：只是刪除@inherits System.Web.Mvc.WebViewPage

案例2：

如果移動_ViewStart.cshtml從視圖文件夾您對自己項目的根文件夾。

解決方案：_ViewStart.cshtml文件只能放置到Views文件夾中。（在相同的水平web.config）

情況下3：

如果升級MVC3到4.5框架，並面臨着這樣的錯誤。

解決方案：只需添加@inherits System.Web.Mvc.ViewStartPage到_ViewStart.cshtml

來源

2017-05-04 19:42:58 Ashiquzzaman

我在該文件中的所有內容是： @ { Layout =「〜/ Views/Shared/_Layout.cshtml」; } – Nick

視圖文件夾中的「Web.config」呢？@Nick – Ashiquzzaman

添加爲原文。 – Nick

無法投射「ASP._Page__ViewStart_cshtml」類型的對象來鍵入「System.Web.WebPages.StartPage」。錯誤

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