构建.NET的核心应用失败由于缺少定义 [英] Build failing on .net Core app due to missing definition

问题描述

我试图使用 DOTNET构建来建立从CLI我的.NET的核心应用程序，但每一次我得到这个错误：

  

IConfigurationBuilder'不包含'AddEnvironmentVariables的定义，并没有扩展方法'AddEnvironmentVariables接受型IConfigurationBuilder第一个参数可以找到（是否缺少using指令或程序集引用？）

这是我在 ConfigureServices 方法 Startup.cs 哪里有问题发生：

 公共无效ConfigureServices（IServiceCollection服务）
    {
        VAR建设者=新ConfigurationBuilder（）
            .AddJsonFile（config.json）
            .AddEnvironmentVariables（）
            。建立（）;        services.AddEntityFrameworkSqlServer（）
             .AddDbContext＆LT; MyContext＆GT;（选项=＆GT;
                 options.UseSqlServer（建设者[数据：MyContext：ConnectionString的]））;        services.AddIdentity＆LT; ApplicationUser，ApplicationRole＆GT;（）
            .AddEntityFrameworkStores＆LT; MyContext＆GT;（）
            .AddDefaultTokenProviders（）
            .AddOpenIddictCore＆lt;应用＆GT（配置=＆GT; config.UseEntityFramework（））;        services.AddMvc（）;        services.AddScoped＆LT; OpenIddictManager＆LT; ApplicationUser，用途＆gt ;, CustomOpenIddictManager＆GT;（）;
    }
 

看着这个例子我什么也看不到明显的错误与我的 Startup.cs 。

更新
我的 project.json 文件：

  {
  compilationOptions：{
    DEBUGTYPE：便携，
    emitEntryPoint：真实，
    preserveCompilationContext：真
  }，  依赖：{
    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- *
  }，  构架： {
    net451：{
      frameworkAssemblies：{
        System.ComponentModel：{类型：建}
      }
    }，    netcoreapp1.0：{
      依赖：{
        Microsoft.NETCore.App：{
          类型：平台，
          版本：1.0.0-rc2- *
        }
      }，      进口：[
        dnxcore50
        便携式net451 + win8的
      ]
    }
  }，  工具：{
    Microsoft.AspNetCore.Server.IISIntegration.Tools：{
      版本：1.0.0-rc2- *，
      进口：便携式net45 + WP80 + win8的+ wpa81 + dnxcore50
    }
  }，  脚本：{
    postpublish：DOTNET发布 -  iis的--publish文件夹％发布：OutputPath％--framework％发布：FullTargetFramework％
  }，  内容：
    wwwroot的
    意见
    config.json
    的web.config
  ]  排除：[
    wwwroot的
    node_modules
  ]  publishExclude：[
    **。用户，
    **。vspscc
  ]
}
 

解决方案

您需要的<一个href=\"https://github.com/aspnet/Configuration/blob/47b13050126fab7afa18e8636bb3c5d1f4022338/src/Microsoft.Extensions.Configuration.EnvironmentVariables/EnvironmentVariablesExtensions.cs\"相对=nofollow> Microsoft.Extensions.Configuration 范围命名空间得到扩展方法。要么完全限定它，或添加到您的文件的顶部：

 使用Microsoft.Extensions.Configuration;
 

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

I'm trying to build my .NET Core app from the CLI using dotnet build, but every single time I get this error:

'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?)

This is my ConfigureServices method in Startup.cs where the problem is happening:

    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>();
    }

Looking at this example I see nothing obviously wrong with my Startup.cs.

Update My project.json file:

{
  "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"
  ]
}

解决方案

You need the Microsoft.Extensions.Configuration namespace in scope to get that extension method. Either fully qualify it, or add this to the top of your file:

using Microsoft.Extensions.Configuration;

You also will need the NuGet reference Microsoft.Extensions.Configuration.EnvironmentVariables.

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