BrowserLink在Visual Studio 2017 RTM上不适用于ASP.NET Core

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当我为ASP.Net Core 1.1应用程序启用BrowserLink时，在浏览器中出现以下错误，我认为因为BrowserLink无法正常工作.

I get the following error in the browser when I enable BrowserLink for my ASP.Net Core 1.1 application and I think because of that the BrowserLink does not work.

Browser Link: Exception thrown when trying to invoke Browser Link extension callback "microsoft.visualstudio.web.browserlink.sourcemappingextensionfactory.getCssMappingData": System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.VisualStudio.Web.Extensions.Common.Helpers.VsWebUrlUtil.EnsureAbsoluteUrl(IVsHierarchy hierarchy, Uri& path) at Microsoft.VisualStudio.Web.Extensions.Common.Helpers.VsWebUrlUtil.GetSimpleVsWebUrlFromUrl(IVsHierarchy hierarchy, Uri url, ILocationContainer& container) at Microsoft.VisualStudio.Web.Extensions.Common.Helpers.VsWebUrlUtil.GetVsWebUrlFromUrl(IVsHierarchy hierarchy, Uri url) at Microsoft.VisualStudio.Web.Extensions.Common.Helpers.LazyLocationContainer.LazyLocationContainerFromUrl.CreateActualLocationContainer() at Microsoft.VisualStudio.Web.Extensions.Common.Helpers.LazyLocationContainer.GetPhysicalPath(Uri& physicalPath) at Microsoft.VisualStudio.Web.Extensions.Common.Helpers.DocumentLocation.Microsoft.VisualStudio.Web.Extensions.Common.Helpers.IDocumentLocation.GetPhysicalPath(Uri& physicalPath) at Microsoft.VisualStudio.Web.BrowserLink.SourceMappingExtension.getCssMappingData(String cssUrl, String[] selectors) --- End of inner exception stack trace --- at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at Microsoft.VisualStudio.Web.BrowserLink.ClientMessaging.DispatchMessage(BrowserLinkConnection connection, MessageArgs obj) Browser Link: Exception thrown when trying to invoke Browser Link extension callback "microsoft.visualstudio.web.browserlink.autosyncextensionfactory.trackCssDocuments": System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.VisualStudio.Web.Extensions.Common.Helpers.VsWebUrlUtil.EnsureAbsoluteUrl(IVsHierarchy hierarchy, Uri& path) at Microsoft.VisualStudio.Web.Extensions.Common.Helpers.VsWebUrlUtil.GetSimpleVsWebUrlFromUrl(IVsHierarchy hierarchy, Uri url, ILocationContainer& container) at Microsoft.VisualStudio.Web.Extensions.Common.Helpers.VsWebUrlUtil.GetVsWebUrlFromUrl(IVsHierarchy hierarchy, Uri url) at Microsoft.VisualStudio.Web.Extensions.Common.Helpers.LazyLocationContainer.LazyLocationContainerFromUrl.CreateActualLocationContainer() at Microsoft.VisualStudio.Web.Extensions.Common.Helpers.LazyLocationContainer.GetPhysicalPath(Uri& physicalPath) at Microsoft.VisualStudio.Web.Extensions.Common.Helpers.DocumentLocation.Microsoft.VisualStudio.Web.Extensions.Common.Helpers.IDocumentLocation.GetPhysicalPath(Uri& physicalPath) at Microsoft.VisualStudio.Web.Extensions.Common.Helpers.DocumentLocation.Microsoft.VisualStudio.Web.Extensions.Common.Helpers.IDocumentLocation.get_PhysicalFileExists() at Microsoft.VisualStudio.Web.BrowserLink.AutoSyncExtension.trackCssDocuments(String[] trackHrefs, String[] untrackHrefs) --- End of inner exception stack trace --- at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at Microsoft.VisualStudio.Web.BrowserLink.ClientMessaging.DispatchMessage(BrowserLinkConnection connection, MessageArgs obj) Browser Link: Failed to invoke return value callback: TypeError: Cannot read property 'files' of null

我已将我的应用配置如下:

I have configured my App as follow:

.csproj配置:

.csproj config:

<ItemGroup> <PackageReference Include="AutoMapper" Version="5.2.0" /> <PackageReference Include="AutoMapper.Extensions.Microsoft.DependencyInjection" Version="1.2.0" /> <PackageReference Include="BundlerMinifier.Core" Version="2.4.337" /> <PackageReference Include="IdentityModel" Version="2.5.1" /> <PackageReference Include="Microsoft.AspNetCore.Authentication.Cookies" Version="1.1.1" /> <PackageReference Include="Microsoft.AspNetCore.Authentication.OpenIdConnect" Version="1.1.1" /> <PackageReference Include="Microsoft.AspNetCore.Diagnostics" Version="1.1.1" /> <PackageReference Include="Microsoft.AspNetCore" Version="1.1.1" /> <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="1.1.2" /> <PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="1.1.1" /> <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="1.1.1" PrivateAssets="All" /> <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="1.1.1" /> <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer.Design" Version="1.1.1" PrivateAssets="All" /> <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="1.1.0" PrivateAssets="All" /> <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="1.1.1" /> <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="1.1.1" /> <PackageReference Include="Microsoft.Extensions.Logging" Version="1.1.1" /> <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="1.1.1" /> <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="1.1.1" /> <PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="1.1.1" /> <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="1.1.0" PrivateAssets="All" /> <PackageReference Include="Microsoft.VisualStudio.Web.BrowserLink" Version="1.1.0" /> <PackageReference Include="Serilog.Extensions.Logging.File" Version="1.0.0" /> </ItemGroup> <ItemGroup> <DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="1.0.0" /> <DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="1.0.0" /> </ItemGroup> <Target Name="PrepublishScript" BeforeTargets="PrepareForPublish"> <Exec Command="bower install" /> <Exec Command="dotnet bundle" /> </Target>

在Configure方法的Startup.cs文件中，我调用了app.UseBrowserLink();.

And in the Startup.cs file in Configure method I have called app.UseBrowserLink();.

更新

似乎错误与* .css文件有关.如果删除所有CSS链接，只会出现以下错误:

It seems the error is related to the *.css files. If I remove all my CSS links I only get the following error:

Browser Link: Failed to invoke return value callback: TypeError: Cannot read property 'files' of null

推荐答案

在使用VS2017在.NET Core中搜索浏览器链接的修补程序时，我首先进入了该线程.

I landed on this thread first when searching for a fix for browser link in .NET Core with VS2017.

我所缺少的只是

app.UseBrowserLink();

在Startup.cs Configure方法中.

in the Startup.cs Configure method.

请参见 Visual Studio 2015 Update 3中具有ASP.NET Core v1.0的浏览器链接

(这可能更适合作为评论，但我没有足够的代表.)

(This is probably better suited as a comment but I don't have enough rep.)