无效的 JSON 文件 project.json答案

【问题标题】：Invalid JSON file project.json无效的 JSON 文件 project.json
【发布时间】：2017-04-16 11:03:21
【问题描述】：

我是实体框架核心的新手，我想在 asp.net 核心中使用实体框架核心。但是当我执行 add-migration firstMigration 时，它总是显示以下错误：

D:\OwnLearnings\EFCore\AspNetCore_EFCore_001\src\AspNetCore_EFCore_001\project.json 中的 JSON 文件无效

项目.json：

 {
   "dependencies": {
   "Microsoft.ApplicationInsights.AspNetCore": "1.0.0",
   "Microsoft.AspNetCore.Diagnostics": "1.0.0",
   "Microsoft.AspNetCore.Mvc": "1.0.1",
   "Microsoft.AspNetCore.Razor.Tools": {
     "version": "1.0.0-preview2-final",
     "type": "build"
   },
   "Microsoft.AspNetCore.Routing": "1.0.1",
   "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
   "Microsoft.AspNetCore.Server.Kestrel": "1.0.1",
   "Microsoft.AspNetCore.StaticFiles": "1.0.0",

   "Microsoft.EntityFrameworkCore.SqlServer": "1.0.0",
   "Microsoft.EntityFrameworkCore.Tools": {
     "version": "1.0.0-preview2-final",
     "type": "build"
    },


    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
    "Microsoft.Extensions.Configuration.Json": "1.0.0",
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0",
    "Microsoft.NETCore.App": {
      "version": "1.0.1",
      "type": "platform"
    },
     "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0"
    },

  "tools": {
    "BundlerMinifier.Core": "2.0.238",
    "Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final",
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final",
    "Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final"
  },

 "frameworks": {
"netcoreapp1.0": {
  "imports": [
    "dotnet5.6",
    "portable-net45+win8"
  ]
}
},

 "buildOptions": {
"emitEntryPoint": true,
"preserveCompilationContext": true
},

 "runtimeOptions": {
"configProperties": {
  "System.GC.Server": true
}
    },

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

 "scripts": {
"prepublish": [ "bower install", "dotnet bundle" ],
"postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
}
   }

我无法找到错误所在。我第一次在实体框架中遇到此类问题。提前致谢。

【问题讨论】：

使用 .json 文件获取 VS2017（如果必须的话，请使用 CE）并获取最新版本，远离那些旧的预览安装... msbuild @987654323 @老实说好多了，

标签： asp.net asp.net-core entity-framework-core

【解决方案1】：

您是否在依赖项中缺少对实体框架包的引用：

"Microsoft.EntityFrameworkCore": "1.0.0"

您还需要 EF Core 的导入来执行迁移和更新（命令行）。这需要在工具部分中（工具引用也需要像你所说的那样在依赖项中，不要删除它）

"dependencies": {
...   
},
"tools": {
    ..,
    "Microsoft.EntityFrameworkCore.Tools": {
      "version": "1.0.0-preview2-final",
      "Imports": [
        "portable-net45+win8+dnxcore50",
        "portable-net45+win8"
      ]
    }
}...

【讨论】：