.Net Core Web应用发布至IIS后报“An error occurred while starting the application”错误

吴贺华

　　An error occurred while starting the application.
　　.NET Core X64 v4.1.1.0    |   Microsoft.AspNetCore.Hosting version 1.1.0-rtm-22752    |    Microsoft Windows 6.3.9600

报这个错，一脸懵逼，环境都按官方文档配置正确了，怎么办？
　　1.修改web.config文件，stdoutLogEnabled改为true，如下：
　　

<aspNetCore processPath="dotnet" arguments=".\Dialysis.WebApi.dll" stdoutLogEnabled="true" stdoutLogFile=".\logs\stdout" />　　

　　2.再次打开网站，还是报上述错误，别急，查看发布根目录发现多了一个Logs文件夹，打开里面的stdout_xxx.log文件
　　Application startup exception: System.IO.FileNotFoundException: Could not find file 'G:\FTP\DialysisWebApi\Dialysis.WebApi.xml'.
　　File name: 'G:\FTP\DialysisWebApi\Dialysis.WebApi.xml'
　　at System.IO.Win32FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, FileStream parent)
　　at System.IO.Win32FileSystem.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, FileStream parent)
　　at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options)
　　at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
　　at System.Xml.XmlSystemPathResolver.GetEntity(Uri uri, String role, Type typeOfObjectToReturn)
　　at System.Xml.XmlTextReaderImpl.FinishInitUriString()
　　at System.Xml.XmlTextReaderImpl..ctor(String uriStr, XmlReaderSettings settings, XmlParserContext context, XmlResolver uriResolver)
　　at System.Xml.XmlReaderSettings.CreateReader(String inputUri, XmlParserContext inputContext)
　　at System.Xml.XmlReader.Create(String inputUri)
　　at System.Xml.XPath.XPathDocument..ctor(String uri, XmlSpace space)
　　at Swashbuckle.AspNetCore.SwaggerGen.SwaggerGenOptions.<>c__DisplayClass24_0.<IncludeXmlComments>b__0()
　　at Swashbuckle.AspNetCore.SwaggerGen.SwaggerGenOptions.CreateSwaggerProvider(IServiceProvider serviceProvider)
　　at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitTransient(TransientCallSite transientCallSite, ServiceProvider provider)
　　at Microsoft.Extensions.DependencyInjection.ServiceProvider.<>c__DisplayClass16_0.<RealizeService>b__0(ServiceProvider provider)
　　at Microsoft.Extensions.Internal.ActivatorUtilities.ConstructorMatcher.CreateInstance(IServiceProvider provider)
　　at Microsoft.Extensions.Internal.ActivatorUtilities.CreateInstance(IServiceProvider provider, Type instanceType, Object[] parameters)
　　at Microsoft.AspNetCore.Builder.UseMiddlewareExtensions.<>c__DisplayClass3_0.<UseMiddleware>b__0(RequestDelegate next)
　　at Microsoft.AspNetCore.Builder.Internal.ApplicationBuilder.Build()
　　at Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication()
　　Hosting environment: Production
　　Content root path: G:\FTP\DialysisWebApi
　　Now listening on: http://localhost:22365
　　Application started. Press Ctrl+C to shut down.
　　发现缺少文件，把文件复制到发布根目录下就解决了

发布至IIS微软官方文档