构建失败.NET的核心应用由于缺少定义

我试图建立从CLI使用dotnet build我的.NET的核心应用程序，但每一次我得到这个错误：构建失败.NET的核心应用由于缺少定义

'IConfigurationBuilder' does not contain a definition for 'AddEnvironmentVariables' and no extension method 'AddEnvironmentVariables' accepting a first argument of type 'IConfigurationBuilder' could be found (are you missing a using directive or an assembly reference?)

这是我的ConfigureServices方法Startup.cs那里的问题正在发生的事情：

public void ConfigureServices(IServiceCollection services) 
    { 
     var builder = new ConfigurationBuilder() 
      .AddJsonFile("config.json") 
      .AddEnvironmentVariables() 
      .Build(); 

     services.AddEntityFrameworkSqlServer() 
      .AddDbContext<MyContext>(options => 
       options.UseSqlServer(builder["Data:MyContext:ConnectionString"])); 

     services.AddIdentity<ApplicationUser, ApplicationRole>() 
      .AddEntityFrameworkStores<MyContext>() 
      .AddDefaultTokenProviders() 
      .AddOpenIddictCore<Application>(config => config.UseEntityFramework()); 

     services.AddMvc(); 

     services.AddScoped<OpenIddictManager<ApplicationUser, Application>, CustomOpenIddictManager>(); 
    }

看着this example我什么也看不到明显的错误与我Startup.cs。

更新我project.json文件：

{ 
    "compilationOptions": { 
    "debugType": "portable", 
    "emitEntryPoint": true, 
    "preserveCompilationContext": true 
    }, 

    "dependencies": { 
    "AspNet.Security.OAuth.Validation": "1.0.0-alpha1-*", 
    "Microsoft.AspNetCore.Authentication.Cookies": "1.0.0-rc2-*", 
    "Microsoft.AspNetCore.Authentication.JwtBearer": "1.0.0-rc2-*", 
    "Microsoft.AspNetCore.Diagnostics": "1.0.0-rc2-*", 
    "Microsoft.AspNetCore.Hosting": "1.0.0-rc2-*", 
    "Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0-rc2-*", 
    "Microsoft.AspNetCore.IISPlatformHandler": "1.0.0-rc2-*", 
    "Microsoft.AspNetCore.Mvc": "1.0.0-rc2-*", 
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0-rc2-*", 
    "Microsoft.AspNetCore.StaticFiles": "1.0.0-rc2-*", 
    "Microsoft.EntityFrameworkCore.SqlServer": "1.0.0-rc2-*", 
    "Microsoft.Extensions.Configuration.Json": "1.0.0-rc2-*", 
    "Microsoft.Extensions.Logging.Console": "1.0.0-rc2-*", 
    "Microsoft.Extensions.Logging.Debug": "1.0.0-rc2-*", 
    "OpenIddict.Core": "1.0.0-*", 
    "OpenIddict.EF": "1.0.0-*" 
    }, 

    "frameworks": { 
    "net451": { 
     "frameworkAssemblies": { 
     "System.ComponentModel": { "type": "build" } 
     } 
    }, 

    "netcoreapp1.0": { 
     "dependencies": { 
     "Microsoft.NETCore.App": { 
      "type": "platform", 
      "version": "1.0.0-rc2-*" 
     } 
     }, 

     "imports": [ 
     "dnxcore50", 
     "portable-net451+win8" 
     ] 
    } 
    }, 

    "tools": { 
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": { 
     "version": "1.0.0-rc2-*", 
     "imports": "portable-net45+wp80+win8+wpa81+dnxcore50" 
    } 
    }, 

    "scripts": { 
    "postpublish": "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" 
    }, 

    "content": [ 
    "wwwroot", 
    "Views", 
    "config.json", 
    "web.config" 
    ], 

    "exclude": [ 
    "wwwroot", 
    "node_modules" 
    ], 

    "publishExclude": [ 
    "**.user", 
    "**.vspscc" 
    ] 
}

来源

2016-05-12 barnacle.m

您需要Microsoft.Extensions.Configuration命名空间范围，以获取扩展方法。要么完全限定它，或添加到您的文件的顶部：

using Microsoft.Extensions.Configuration;

您还需要参考的NuGet Microsoft.Extensions.Configuration.EnvironmentVariables。

来源

2016-05-12 15:14:11 mason

谢谢，它正在建设中。我认为这个软件包已经重新命名了，所以我没有看到它。核心软件包总是在不断变化。 –

@ barnacle.m请记住，源代码位于GitHub上，所以如果您有任何疑问，可以随时查看。 – mason

我试过Microsoft.Extensions.Configuration.EnvironmentVariables但没有运气。我已经从NuGet获得了Microsoft.Extensions.Configuration。我添加了Microsoft.Extensions.Configuration.UserSecrets 然后它工作。

来源

2017-01-10 19:47:08 spacebread

要添加的正确包。 AddEnvironmentVariables()是Microsoft.Extensions.Configuration.EnvironmentVariables

来源

2017-07-19 13:59:59 Carlo

构建失败.NET的核心应用由于缺少定义

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