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c# - 更新包后，未将对象引用设置为 _Layout.cshtml 中的对象实例

转载 作者：行者123 更新时间：2023-12-02 03:47:26 28 4
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该项目运行良好，直到我通过以下方式更新了所有 NuGet 包NuGet Manager(我试图获取最新的 OWIN 包)。

这个错误在_Layout.cshtml中，我根本没有碰过它。

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution ofthe current web request. Please review the stack trace for moreinformation about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference notset to an instance of an object.

Source Error:

Line 13:  
Line 14:     <!-- Custom Fonts -->
Line 15:     @Scripts.Render("~/Content/fonts")

Source File: f:\Workplace\lrc\lrc\Views\Shared_Layout.cshtml Line:15

<小时/>

更新

以下是_Layout.cshtml中的代码(它们是在创建项目时自动生成的):

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="LRC - We are aiming at building up a healthier life style.">
    <meta name="author" content="Winston Fan">
    <title>@ViewBag.Title - LRC</title>
    @Styles.Render("~/Content/css")
    @Scripts.Render("~/bundles/modernizr")

    <!-- Custom Fonts -->
    @Scripts.Render("~/Content/fonts")
    
    <link href="http://fonts.googleapis.com/css?family=Lora:400,700,400italic,700italic" rel="stylesheet" type="text/css">
    <link href="http://fonts.googleapis.com/css?family=Montserrat:400,700" rel="stylesheet" type="text/css">

所以它提示这行代码:

@Scripts.Render("~/Content/fonts")

但是正如你所看到的，这是 VS 生成的代码，我怎么会出错呢？

我还检查了 Conntent/font-awesome/fonts 文件夹中的内容，所有必需的资源都在那里。

这是 BundleConfig 中的代码(也是自动生成的代码):

bundles.Add(new ScriptBundle("~/Content/fonts").Include(
              "~/Content/font-awesome/fonts/fontawesome-*",
              "~/Content/font-awesome/fonts/FontAwesome.otf"));

我的 Microsoft.OWin.Security、Microsoft.OWin.Security.Google 和 Microsoft.OWin 版本为 3.0.1.0 .

<小时/>

更新2

这是堆栈跟踪:

[NullReferenceException: Object reference not set to an instance of an
object.]    Microsoft.Ajax.Utilities.JSParser.ParseExpression(AstNode
leftHandSide, Boolean single, Boolean bCanAssign, JSToken inToken)
+1007    Microsoft.Ajax.Utilities.JSParser.ParseExpressionStatement(Boolean
fSourceElement) +268   
Microsoft.Ajax.Utilities.JSParser.ParseStatement(Boolean
fSourceElement, Boolean skipImportantComment) +1552   
Microsoft.Ajax.Utilities.JSParser.ParseBlock() +164   
Microsoft.Ajax.Utilities.JSParser.ParseStatement(Boolean
fSourceElement, Boolean skipImportantComment) +498   
Microsoft.Ajax.Utilities.JSParser.ParseBlock() +164   
Microsoft.Ajax.Utilities.JSParser.ParseStatement(Boolean
fSourceElement, Boolean skipImportantComment) +498   
Microsoft.Ajax.Utilities.JSParser.ParseBlock() +164   
Microsoft.Ajax.Utilities.JSParser.ParseStatement(Boolean
fSourceElement, Boolean skipImportantComment) +498   
Microsoft.Ajax.Utilities.JSParser.ParseStatements(Block block) +159   
Microsoft.Ajax.Utilities.JSParser.InternalParse() +1011   
Microsoft.Ajax.Utilities.JSParser.Parse(DocumentContext sourceContext)
+123    Microsoft.Ajax.Utilities.JSParser.Parse(DocumentContext sourceContext, CodeSettings settings) +54   
Microsoft.Ajax.Utilities.Minifier.MinifyJavaScript(String source,
CodeSettings codeSettings) +987   
System.Web.Optimization.JsMinify.Process(BundleContext context,
BundleResponse response) +310   
System.Web.Optimization.Bundle.ApplyTransforms(BundleContext context,
String bundleContent, IEnumerable`1 bundleFiles) +263   
System.Web.Optimization.Bundle.GenerateBundleResponse(BundleContext
context) +355   
System.Web.Optimization.Bundle.GetBundleResponse(BundleContext
context) +104   
System.Web.Optimization.BundleResolver.GetBundleContents(String
virtualPath) +254   
System.Web.Optimization.AssetManager.DeterminePathsToRender(IEnumerable`1
assets) +252   
System.Web.Optimization.AssetManager.RenderExplicit(String tagFormat,
String[] paths) +75   
System.Web.Optimization.Scripts.RenderFormat(String tagFormat,
String[] paths) +292   
System.Web.Optimization.Scripts.Render(String[] paths) +51   
ASP._Page_Views_Shared__Layout_cshtml.Execute() in
f:\Workplace\lrc\lrc\Views\Shared\_Layout.cshtml:15   
System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +271   
System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +121   
System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext
pageContext, TextWriter writer, WebPageRenderingBase startPage) +145  
System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext
pageContext, TextWriter writer) +41   
System.Web.WebPages.<>c__DisplayClass3.<RenderPageCore>b__2(TextWriter
writer) +335    System.Web.WebPages.HelperResult.WriteTo(TextWriter
writer) +42   
System.Web.WebPages.WebPageExecutingBase.WriteTo(TextWriter writer,
HelperResult content) +45   
System.Web.WebPages.WebPageBase.Write(HelperResult result) +53   
System.Web.WebPages.WebPageBase.RenderSurrounding(String
partialViewName, Action`1 body) +178   
System.Web.WebPages.WebPageBase.PopContext() +229   
System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext
pageContext, TextWriter writer, WebPageRenderingBase startPage) +154  
System.Web.Mvc.RazorView.RenderView(ViewContext viewContext,
TextWriter writer, Object instance) +695   
System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext
viewContext, TextWriter writer) +382   
System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context)
+431    System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext
controllerContext, ActionResult actionResult) +39   
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1
filters, Int32 filterIndex, ResultExecutingContext preContext,
ControllerContext controllerContext, ActionResult actionResult) +116  
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1
filters, Int32 filterIndex, ResultExecutingContext preContext,
ControllerContext controllerContext, ActionResult actionResult) +529  
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext
controllerContext, IList`1 filters, ActionResult actionResult) +106   
System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c()
+321    System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult
asyncResult) +185   
System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult
asyncResult) +42   
System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +133   
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult,
Object tag) +56   
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult
asyncResult) +40   
System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult
asyncResult, ExecuteCoreState innerState) +34   
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult
asyncResult) +70   
System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +139   
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult,
Object tag) +59   
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult,
Object tag) +40   
System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +44
System.Web.Mvc.Controller.<BeginExecute>b__15(IAsyncResult
asyncResult, Controller controller) +39   
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult
asyncResult) +62   
System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +139   
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult,
Object tag) +59   
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult,
Object tag) +40    System.Web.Mvc.Controller.EndExecute(IAsyncResult
asyncResult) +39   
System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult
asyncResult) +39   
System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult
asyncResult, ProcessRequestState innerState) +39   
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult
asyncResult) +70   
System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +139   
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult,
Object tag) +59   
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult,
Object tag) +40   
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult)
+40    System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult
result) +38   
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
+932    System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +188
<小时/>

更新3

这是Content文件夹:

enter image description here

<小时/>

更新 4

这是packages.config的内容:

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Antlr" version="3.5.0.2" targetFramework="net451" />
  <package id="bootstrap" version="3.3.4" targetFramework="net451" />
  <package id="EntityFramework" version="6.1.3" targetFramework="net451" />
  <package id="jQuery" version="2.1.3" targetFramework="net451" />
  <package id="jQuery.Validation" version="1.13.1" targetFramework="net451" />
  <package id="Microsoft.AspNet.Identity.Core" version="2.2.1" targetFramework="net451" />
  <package id="Microsoft.AspNet.Identity.EntityFramework" version="2.2.1" targetFramework="net451" />
  <package id="Microsoft.AspNet.Identity.Owin" version="2.2.1" targetFramework="net451" />
  <package id="Microsoft.AspNet.Mvc" version="5.2.3" targetFramework="net451" />
  <package id="Microsoft.AspNet.Razor" version="3.2.3" targetFramework="net451" />
  <package id="Microsoft.AspNet.Web.Optimization" version="1.1.3" targetFramework="net451" />
  <package id="Microsoft.AspNet.WebApi" version="5.2.3" targetFramework="net451" />
  <package id="Microsoft.AspNet.WebApi.Client" version="5.2.3" targetFramework="net451" />
  <package id="Microsoft.AspNet.WebApi.Core" version="5.2.3" targetFramework="net451" />
  <package id="Microsoft.AspNet.WebApi.WebHost" version="5.2.3" targetFramework="net451" />
  <package id="Microsoft.AspNet.WebPages" version="3.2.3" targetFramework="net451" />
  <package id="Microsoft.jQuery.Unobtrusive.Validation" version="3.2.3" targetFramework="net451" />
  <package id="Microsoft.Owin" version="3.0.1" targetFramework="net451" />
  <package id="Microsoft.Owin.Host.SystemWeb" version="3.0.1" targetFramework="net451" />
  <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net451" />
  <package id="Microsoft.Owin.Security.Cookies" version="3.0.1" targetFramework="net451" />
  <package id="Microsoft.Owin.Security.Facebook" version="3.0.1" targetFramework="net451" />
  <package id="Microsoft.Owin.Security.Google" version="3.0.1" targetFramework="net451" />
  <package id="Microsoft.Owin.Security.MicrosoftAccount" version="3.0.1" targetFramework="net451" />
  <package id="Microsoft.Owin.Security.OAuth" version="3.0.1" targetFramework="net451" />
  <package id="Microsoft.Owin.Security.Twitter" version="3.0.1" targetFramework="net451" />
  <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net451" />
  <package id="Modernizr" version="2.8.3" targetFramework="net451" />
  <package id="Newtonsoft.Json" version="6.0.8" targetFramework="net451" />
  <package id="Owin" version="1.0" targetFramework="net451" />
  <package id="Respond" version="1.4.2" targetFramework="net451" />
  <package id="WebGrease" version="1.6.0" targetFramework="net451" />
</packages>

最佳答案

这里通过在 BundleConfig 中将“ScriptBundle”替换为“Bundle”来修复该问题。

我们替换了以下内容:

bundles.Add(new ScriptBundle("~/bundles/mybundle").Include(
            "~/Scripts/...",
            "~/Scripts/..."));

与:

bundles.Add(new Bundle("~/bundles/mybundle").Include(
            "~/Scripts/...",
            "~/Scripts/..."));

关于c# - 更新包后，未将对象引用设置为 _Layout.cshtml 中的对象实例，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30219807/

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