没有找到配置文件‘ appsetings.json’，它不是可选的

Azure 的错误是:

. Net Core: 应用程序启动异常: FileNotFoundException: 配置文件 没有找到“ appsetings.json”，也不是可选的。

所以这有点模糊。我似乎无法确定。我正试图部署一个。Net Core Web API 项目到 Azure，我得到了这个错误:

: (糟糕。500内部服务器错误 启动应用程序时出错。

我已经部署好了。网络应用程序接口，它们已经工作了。我关注了一些在线教程，它们很有效。但不知怎么的，我的项目破产了。在 Web.config 上启用 stdoutLogEnable 并查看 Azure 流日志可以得到以下结果:

2016-08-26T02:55:12  Welcome, you are now connected to log-streaming service.
Application startup exception: System.IO.FileNotFoundException: The configuration file 'appsettings.json' was not found and is not optional.
at Microsoft.Extensions.Configuration.FileConfigurationProvider.Load(Boolean reload)
at Microsoft.Extensions.Configuration.FileConfigurationProvider.Load()
at Microsoft.Extensions.Configuration.ConfigurationRoot..ctor(IList`1 providers)
at Microsoft.Extensions.Configuration.ConfigurationBuilder.Build()
at Quanta.API.Startup..ctor(IHostingEnvironment env) in D:\Source\Workspaces\Quanta\src\Quanta.API\Startup.cs:line 50
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.Extensions.Internal.ActivatorUtilities.ConstructorMatcher.CreateInstance(IServiceProvider provider)
at Microsoft.Extensions.Internal.ActivatorUtilities.CreateInstance(IServiceProvider provider, Type instanceType, Object[] parameters)
at Microsoft.Extensions.Internal.ActivatorUtilities.GetServiceOrCreateInstance(IServiceProvider provider, Type type)
at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetServiceOrCreateInstance(IServiceProvider provider, Type type)
at Microsoft.AspNetCore.Hosting.Internal.StartupLoader.LoadMethods(IServiceProvider services, Type startupType, String environmentName)
at Microsoft.AspNetCore.Hosting.WebHostBuilderExtensions.<>c__DisplayClass1_0.<UseStartup>b__1(IServiceProvider sp)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.FactoryService.Invoke(ServiceProvider provider)
at Microsoft.Extensions.DependencyInjection.ServiceProvider.ScopedCallSite.Invoke(ServiceProvider provider)
at Microsoft.Extensions.DependencyInjection.ServiceProvider.SingletonCallSite.Invoke(ServiceProvider provider)
at Microsoft.Extensions.DependencyInjection.ServiceProvider.<>c__DisplayClass12_0.<RealizeService>b__0(ServiceProvider provider)
at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
at Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureStartup()
at Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureApplicationServices()
at Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication()
Hosting environment: Production
Content root path: D:\home\site\wwwroot
Now listening on: http://localhost:30261
Application started. Press Ctrl+C to shut down.

好吧，看起来很简单。它找不到应用程序 json。看看我的配置(startup.cs) ，它似乎定义得非常好。我的初创公司是这样的:

public class Startup
{
private static string _applicationPath = string.Empty;
private static string _contentRootPath = string.Empty;
public IConfigurationRoot Configuration { get; set; }
public Startup(IHostingEnvironment env)
{
_applicationPath = env.WebRootPath;
_contentRootPath = env.ContentRootPath;
// Setup configuration sources.


var builder = new ConfigurationBuilder()
.SetBasePath(_contentRootPath)
.AddJsonFile("appsettings.json")
.AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true);


if (env.IsDevelopment())
{
// This reads the configuration keys from the secret store.
// For more details on using the user secret store see http://go.microsoft.com/fwlink/?LinkID=532709
builder.AddUserSecrets();
}


builder.AddEnvironmentVariables();
Configuration = builder.Build();
}
private string GetXmlCommentsPath()
{
var app = PlatformServices.Default.Application;
return System.IO.Path.Combine(app.ApplicationBasePath, "Quanta.API.xml");
}


// This method gets called by the runtime. Use this method to add services to the container.
// For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=398940
public void ConfigureServices(IServiceCollection services)
{
var pathToDoc = GetXmlCommentsPath();




services.AddDbContext<QuantaContext>(options =>
options.UseSqlServer(Configuration["Data:DefaultConnection:ConnectionString"],
b => b.MigrationsAssembly("Quanta.API")));


//Swagger
services.AddSwaggerGen();
services.ConfigureSwaggerGen(options =>
{
options.SingleApiVersion(new Info
{
Version = "v1",
Title = "Project Quanta API",
Description = "Quant.API",
TermsOfService = "None"
});
options.IncludeXmlComments(pathToDoc);
options.DescribeAllEnumsAsStrings();
});


// Repositories
services.AddScoped<ICheckListRepository, CheckListRepository>();
services.AddScoped<ICheckListItemRepository, CheckListItemRepository>();
services.AddScoped<IClientRepository, ClientRepository>();
services.AddScoped<IDocumentRepository, DocumentRepository>();
services.AddScoped<IDocumentTypeRepository, DocumentTypeRepository>();
services.AddScoped<IProjectRepository, ProjectRepository>();
services.AddScoped<IProtocolRepository, ProtocolRepository>();
services.AddScoped<IReviewRecordRepository, ReviewRecordRepository>();
services.AddScoped<IReviewSetRepository, ReviewSetRepository>();
services.AddScoped<ISiteRepository, SiteRepository>();


// Automapper Configuration
AutoMapperConfiguration.Configure();


// Enable Cors
services.AddCors();


// Add MVC services to the services container.
services.AddMvc()
.AddJsonOptions(opts =>
{
// Force Camel Case to JSON
opts.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
});
}


// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app)
{
app.UseStaticFiles();
// Add MVC to the request pipeline.
app.UseCors(builder =>
builder.AllowAnyOrigin()
.AllowAnyHeader()
.AllowAnyMethod());


app.UseExceptionHandler(
builder =>
{
builder.Run(
async context =>
{
context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
context.Response.Headers.Add("Access-Control-Allow-Origin", "*");


var error = context.Features.Get<IExceptionHandlerFeature>();
if (error != null)
{
context.Response.AddApplicationError(error.Error.Message);
await context.Response.WriteAsync(error.Error.Message).ConfigureAwait(false);
}
});
});


app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "{controller=Home}/{action=Index}/{id?}");


// Uncomment the following line to add a route for porting Web API 2 controllers.
//routes.MapWebApiRoute("DefaultApi", "api/{controller}/{id?}");
});




//Ensure DB is created, and latest migration applied. Then seed.
using (var serviceScope = app.ApplicationServices
.GetRequiredService<IServiceScopeFactory>()
.CreateScope())
{
QuantaContext dbContext = serviceScope.ServiceProvider.GetService<QuantaContext>();
dbContext.Database.Migrate();
QuantaDbInitializer.Initialize(dbContext);
}




app.UseSwagger();
app.UseSwaggerUi();




}
}

这在当地很管用。但一旦我们发布到 Azure 上，就失败了。我不知所措。我创造了新的。部署到 Azure 的 Net 核心项目刚刚发现。但是这个我投入了所有时间的项目似乎失败了。我已经准备好复制和粘贴失败的项目的代码到一个新的项目中，但我真的很好奇是什么破坏了这一点。

有什么想法吗？

编辑: 所以我的程序是:

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Hosting;


namespace Quanta.API
{
public class Program
{
public static void Main(string[] args)
{
var host = new WebHostBuilder()
.UseKestrel()
.UseContentRoot(Directory.GetCurrentDirectory())
.UseIISIntegration()
.UseStartup<Startup>()
.Build();


host.Run();
}
}
}

编辑2: 根据 Frans 的说法，我查了出版物的选项，是:

"publishOptions": {
"include": [
"wwwroot",
"web.config"
]

我从一个工作项目中提取了一个出版物选项，并将其更改为:

 "publishOptions": {
"include": [
"wwwroot",
"Views",
"Areas/**/Views",
"appsettings.json",
"web.config"
]
},

它仍然给出了一个500错误，但是没有给出堆栈跟踪，说明它可以加载 appsettings.json。现在它正在抱怨与 SQL 的连接。我注意到我的 SQL 连接字符串代码在很多 RC1博客文章中都有提到。的 RC2。网络核心改变了它。所以我更新到:

  "Data": {
"ConnectionStrings": {
"DefaultConnection": "Server=(localdb)\\MSSQLLocalDB;Database=QuantaDb;Trusted_Connection=True;MultipleActiveResultSets=true"
}
},

然后把我的创业公司改成:

 services.AddDbContext<QuantaContext>(options =>
options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"),
b => b.MigrationsAssembly("Quanta.API")));

终于成功了。

我必须遵循一个较老的 RC1例子，并没有意识到这一点。

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最佳答案

Check the publishOptions in project.json and make sure the "include" section has "appsettings.json" in it. They changed the publish model in RTM to require you to specify everything you want copied from the compile directory to the web folder.

EDIT: See Jensdc answer below for how to do this with .csproj after project.json was killed.

小开

In your project.json

ensure you have inlcuded appsettings.json as a copyToOutput

"buildOptions": {
"emitEntryPoint": true,
"preserveCompilationContext": true,
"copyToOutput": {
"include": [ "appsettings.json" ]
}
},
小开

In later .net core versions a *.csproj file is used instead of the project.json file.

You can modify the file to get the desired result by adding:

   <ItemGroup>
<Content Update="appsettings.json">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</Content>
</ItemGroup>
小开

You don't need to add your .json file to publish options. it's just that it is looking for the file at the wrong path.

set base path and then add json file and it will work.

 public Startup(IHostingEnvironment environment)
{
var builder = new ConfigurationBuilder()
.SetBasePath(environment.ContentRootPath)
.AddJsonFile("TestJson.json");


Configuration = builder.Build();
}

here, startup constructor is built with with HostingEnviornment and base path is set to the current root path. and it will work!

小开

For me, what solved was setting to include the appsettings.json via interface on the output directory (Build directory), like so:

enter image description here

小开

In My case the file appsettings.json existed in project folder, but it was set to Do not copy, I changed the setting to Copy always (see images below). And it worked for me.

It will automatically added following XML to your project.csproj file:

<ItemGroup>
<Content Update="appsettings.json">
<CopyToOutputDirectory>Always</CopyToOutputDirectory>
</Content>
</ItemGroup>

I have looked at other answer, project.json is dead as this answer says.

enter image description here enter image description here

小开

For me, I got this error because of JSON file syntax error (typo: deleted comma).

By default, property "Copy to Output Directory" of appsettings.json set to "Do not Copy" which I think is correct.

小开

For me the error was using Directory.GetCurrentDirectory(). This worked fine running locally but on a production server it failed when the program was started from Powershell. Replaced with Assembly.GetEntryAssembly().Location and everything worked.

Complete code:

var builder = new ConfigurationBuilder()
.SetBasePath(Path.GetDirectoryName(Assembly.GetEntryAssembly().Location))
.AddJsonFile("appsettings.json");


var configuration = builder.Build();
小开

I ended up here when publishing my Azure Function from Visual Studio 2019. I got this error when trying to publish my function to the portal with an appSettings.json file. It was copying the appSettings.json to the output directory but not the publish directory. I had to add the line below to the .csproj of the azure function project.

<CopyToPublishDirectory>Always</CopyToPublishDirectory>

So my .csproj would look like the below:

<ItemGroup>
<None Update="host.json">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
<None Update="appsettings.json">
<CopyToOutputDirectory>Always</CopyToOutputDirectory>
<CopyToPublishDirectory>Always</CopyToPublishDirectory>
</None>
<None Update="local.settings.json">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>

小开

This answer is for... Someone trying to debug on VS Code, but appsettings.json is not being picked up. I tried debugging the same solution in Visual Studio, and it worked. Also, I was able to access environment variables. App version: Core 2.2.

I deleted the .vscode folder and debugged again and it worked.

小开

What worked for me was changing the Copy to Output Directory property on appsettings.json to Copy if newer.

小开

Had the same problem while using .net core 3 and this is what worked.

<None Update="appsettings.json">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>

hope this is good

小开

I had the same error while the app is being run from network share. It even was trying to locate appsettings.json file at user's desktop.

I ended up combining the path with executable location, like below:

configuration
.AddJsonFile(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "appsettings.json"), optional: false, reloadOnChange: false)
.AddJsonFile(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, $"appsettings.{env.EnvironmentName}.json"), optional: true, reloadOnChange: false);
小开

For me the problem was that the appsettings.json file was hidden. How it ended up being hidden I have not idea but the .netcore ConfiguraitonFileProvider has a check for hidden files and does not load them if they are hidden.

小开

For me, it was using config.GetConnectionString(); to get the value instead of config.GetValue(). That's after I enabled CopyAlways in when clicking on appsettings.json Properties (right click).


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