术语 'Add-Migration' 不被识别为 cmdlet、函数、脚本文件或可操作程序的名称

Question

请帮助我解决此问题。以下是我的project.json文件。

    {
  "dependencies": {
    "Microsoft.NETCore.App": {
      "version": "1.0.0",
      "type": "platform"
    },
    "Microsoft.AspNetCore.Diagnostics": "1.0.0",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0",
    "Microsoft.Extensions.Logging.Console": "1.0.0",
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.AspNetCore.StaticFiles": "1.0.0",
    "Microsoft.AspNetCore.Mvc": "1.0.0",
    "Microsoft.Extensions.Configuration.Json": "1.0.0",
    "Microsoft.EntityFrameworkCore": "1.0.0",
    "Microsoft.EntityFrameworkCore.SqlServer": "1.0.0",
    "Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final",
    "Microsoft.EntityFrameworkCore.SqlServer.Design": "1.0.0"
  },
  "tools": {
    "Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final",
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final",
    "Microsoft.EntityFrameworkCore.Tools": {
      "version": "1.0.0-preview2-final",
      "imports": [ "portable-net45+win8+dnxcore50", "portable-net45+win8" ]
    }
  },
  "frameworks": {
    "netcoreapp1.0": {
      "imports": [ "dotnet5.6", "portable-net45+win8" ]
    }
  },
  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true
  },
  "runtimeOptions": {
    "configProperties": {
      "System.GC.Server": true
    }
  },
  "publishOptions": {
    "include": [ "wwwroot", "web.config" ]
  },
  "scripts": {
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

当我创建一个全新的项目并在项目中添加相同的项目。

当我在互联网上检查时，人们谈论重新启动VS2015，我已经完成了所有问题，仍然存在问题。

Answer 1

您是否尝试过在Add-Migration之前运行Enable-Migrations命令？

，或者如果不起作用，则此答案似乎建议从Nuget重新安装实体框架