如何在Web Core API中调试启动? [英] How to debug startup in Web Core API?
问题描述
我有一个使用Web Core API的MVC网站. 进行较小的更改和部署后，我意外地收到了错误；响应状态代码不表示成功:500(内部服务器错误). 因此，我为Web Core API启用了日志文件(请参阅
I have an MVC website that uses a Web Core API. After making a minor change and a deployment I unexpectedly got an error; Response status code does not indicate success: 500 (Internal Server Error). So I enabled the log file for the Web Core API (see https://docs.microsoft.com/en-us/aspnet/core/host-and-deploy/iis/troubleshoot?view=aspnetcore-2.0#aspnet-core-module-stdout-log) and I get this error message;
应用程序启动异常:System.Collections.Generic.KeyNotFoundException:字典中不存在给定的键.在System.Collections.Generic.Dictionary2.get_Item(TKey键)处 在Microsoft.AspNetCore.Mvc.Internal.DefaultAssemblyPartDiscoveryProvider.CandidateResolver.ComputeClassification(字符串依赖) 在Microsoft.AspNetCore.Mvc.Internal.DefaultAssemblyPartDiscoveryProvider.CandidateResolver.ComputeClassification(字符串依赖) 在Microsoft.AspNetCore.Mvc.Internal.DefaultAssemblyPartDiscoveryProvider.CandidateResolver.ComputeClassification(字符串依赖) 在Microsoft.AspNetCore.Mvc.Internal.DefaultAssemblyPartDiscoveryProvider.CandidateResolver.d__4.MoveNext() 在System.Linq.Enumerable.d__172.MoveNext()在System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()在Microsoft.Extensions.DependencyInjection.MvcCoreServiceCollectionExtensions.GetApplicationPartManager(IServiceCollection services)在Microsoft.Extensions.CoreencyM. (Property.API.Startup.ConfigureServices(IServiceCollection服务)处的(IServiceCollection服务)-从上一个引发异常的位置开始的堆栈跟踪结尾--在Microsoft.AspNetCore的System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()处. Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication()上Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureApplicationServices()上的Hosting.ConventionBasedStartup.ConfigureServices(IServiceCollection服务)托管环境:暂存内容根路径:C:\ inetpub \ wwwroot \ SIR现在正在侦听: http://localhost:33007 应用程序启动.按Ctrl + C关闭.
Application startup exception: System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary. at System.Collections.Generic.Dictionary2.get_Item(TKey key) at Microsoft.AspNetCore.Mvc.Internal.DefaultAssemblyPartDiscoveryProvider.CandidateResolver.ComputeClassification(String dependency) at Microsoft.AspNetCore.Mvc.Internal.DefaultAssemblyPartDiscoveryProvider.CandidateResolver.ComputeClassification(String dependency) at Microsoft.AspNetCore.Mvc.Internal.DefaultAssemblyPartDiscoveryProvider.CandidateResolver.ComputeClassification(String dependency) at Microsoft.AspNetCore.Mvc.Internal.DefaultAssemblyPartDiscoveryProvider.CandidateResolver.d__4.MoveNext() at System.Linq.Enumerable.d__172.MoveNext() at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext() at Microsoft.Extensions.DependencyInjection.MvcCoreServiceCollectionExtensions.GetApplicationPartManager(IServiceCollection services) at Microsoft.Extensions.DependencyInjection.MvcCoreServiceCollectionExtensions.AddMvcCore(IServiceCollection services) at Properties.API.Startup.ConfigureServices(IServiceCollection services) --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at Microsoft.AspNetCore.Hosting.ConventionBasedStartup.ConfigureServices(IServiceCollection services) at Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureApplicationServices() at Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication() Hosting environment: Staging Content root path: C:\inetpub\wwwroot\SIR Now listening on: http://localhost:33007 Application started. Press Ctrl+C to shut down.
更新: 它跌倒的那条线是;
UPDATE: The line where it is falling over is;
services.AddMvcCore().AddJsonFormatters();
services.AddMvcCore().AddJsonFormatters();
在ConfigureServices中.
in ConfigureServices.
我该如何调试它以找出导致此问题的原因?
How do I debug this to find out what is causing this?
public class Startup {
public Startup(IHostingEnvironment env) {
var builder = new ConfigurationBuilder()
.SetBasePath(env.ContentRootPath)
.AddJsonFile("appSettings.json", optional: false, reloadOnChange: true)
.AddJsonFile($ "appSettings.{env.EnvironmentName}.json", optional: true, reloadOnChange: true)
.AddEnvironmentVariables();
Configuration = builder.Build();
}
.
.
.
.
.
public void ConfigureServices(IServiceCollection services)
{
services.AddCors();
services.AddMvcCore().AddJsonFormatters();
services.Configure<IISOptions>(options => new IISOptions
{
AutomaticAuthentication = true,
ForwardClientCertificate = false,
ForwardWindowsAuthentication = false
});
var connectionStringMSurveyV2 = Configuration.GetConnectionString("MSurveyV2Db");
services.AddScoped<MSurveyV2Db>(_ => new MSurveyV2Db(connectionStringMSurveyV2));
var connectionStringSir = Configuration.GetConnectionString("SirDb");
services.AddScoped<SirDb>(_ => new SirDb(connectionStringSir));
services.AddScoped<IPropertiesRepo, PropertiesRepo>();
services.AddScoped<ISirUoW, SirUoW>();
services.AddScoped<IPropertyUoW, PropertyUoW>();
services.AddScoped<Services.IMailService, Services.MailService>();
}
. . .
推荐答案
您没有说要使用哪个版本的ASP.NET Core.如果是2.0+，则可以将Program.cs中的NLog配置为在启动之前加载:
You didn't say which version of ASP.NET Core you are using. If it's 2.0+, you can configure NLog in Program.cs to load before Startup:
public static class Program
{
public static void Main(string[] args)
{
var logger = NLogBuilder.ConfigureNLog("nlog.config").GetCurrentClassLogger();
try
{
var config = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("hosting.json", optional: true)
.Build();
BuildWebHost(args, config).Run();
}
catch (System.Exception ex)
{
logger.Error(ex, "An error occurred during program startup");
throw;
}
}
private static IWebHost BuildWebHost(string[] args, IConfigurationRoot config)
{
return WebHost.CreateDefaultBuilder(args)
.UseConfiguration(config)
.UseStartup<Startup>()
.UseNLog()
.Build();
}
}
这篇关于如何在Web Core API中调试启动?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
