c# - 在程序集中找不到入口点'Microsoft.EntityFrameworkCore.Design，版本 = 1.1.0.0

Question

我遇到了与这篇文章类似的问题:

Entry point not found in assembly 'Microsoft.EntityFrameworkCore.Design - dotnet.exe crashes

我创建了一个 Asp.Net Core MVC 应用程序，project.json 看起来像这样:

{

  "dependencies": {
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.EntityFrameworkCore.Tools": {
      "version": "1.1.0-preview4-final",
      "type": "build"
    },

    "Microsoft.EntityFrameworkCore.Design": {
      "version": "1.1.0",
      "type": "build"
    },

    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.VisualStudio.Web.CodeGenerators.Mvc": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "RealEstateCoreApplication.DB": "1.0.0-*",
    "Microsoft.AspNetCore.Authentication.Cookies": "1.1.0",
    "Microsoft.AspNetCore.Diagnostics": "1.1.0",
    "Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.1.0",
    "Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.1.0",
    "Microsoft.AspNetCore.Mvc": "1.1.1",
    "Microsoft.AspNetCore.Routing": "1.1.0",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.1.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.1.0",
    "Microsoft.AspNetCore.StaticFiles": "1.1.0",
    "Microsoft.EntityFrameworkCore.SqlServer": "1.1.0",
    "Microsoft.EntityFrameworkCore.SqlServer.Design": "1.1.0",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.1.0",
    "Microsoft.Extensions.Configuration.Json": "1.1.0",
    "Microsoft.Extensions.Configuration.UserSecrets": "1.1.0",
    "Microsoft.Extensions.Logging": "1.1.0",
    "Microsoft.Extensions.Logging.Console": "1.1.0",
    "Microsoft.Extensions.Logging.Debug": "1.1.0",
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.1.0",
    "Microsoft.NETCore.App": "1.1.0",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.1.0",
    "BundlerMinifier.Core": "2.3.327"
  },

  "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"
      ]
    },

    "Microsoft.Extensions.SecretManager.Tools": "1.0.0-preview2-final",
    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
      "version": "1.0.0-preview2-final",
      "imports": [
        "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",
      "**/*.cshtml",
      "appsettings.json",
      "web.config"
    ]
  },

  "scripts": {
    "prepublish": [ "bower install", "dotnet bundle" ],
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  },
  "runtimes": {
    "win7-x64": {}
  }
}

我尝试了很多东西，但无法设置命令:“dotnet ef database update -c IdentityDb”在命令窗口中工作(IdentityDb 替换了默认的应用程序上下文)。只是不停地说:在程序集中找不到入口点'Microsoft.EntityFrameworkCore.Design，版本= 1.1.0.0

Answer 1

我遇到了同样的问题，经过几次测试，我找到了解决方案。
这是我的 project.json

"dependencies": {
"Microsoft.AspNetCore.Authentication.Cookies": "1.1.1",
"Microsoft.AspNetCore.Diagnostics": "1.1.1",
"Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.1.1",
"Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.1.1",
"Microsoft.AspNetCore.Mvc": "1.1.2",
"Microsoft.AspNetCore.Routing": "1.1.1",
"Microsoft.AspNetCore.Server.IISIntegration": "1.1.1",
"Microsoft.AspNetCore.Server.Kestrel": "1.1.1",
"Microsoft.AspNetCore.StaticFiles": "1.1.1",
"Microsoft.EntityFrameworkCore.SqlServer": "1.1.1",
"Microsoft.EntityFrameworkCore.SqlServer.Design": "1.1.1",
"Microsoft.EntityFrameworkCore.Design": "1.1.1",
"Microsoft.EntityFrameworkCore.Tools.DotNet": "1.1.0-preview4-final",
"Microsoft.Extensions.Configuration.EnvironmentVariables": "1.1.1",
"Microsoft.Extensions.Configuration.Json": "1.1.1",
"Microsoft.Extensions.Configuration.UserSecrets": "1.1.1",
"Microsoft.Extensions.Logging": "1.1.1",
"Microsoft.Extensions.Logging.Console": "1.1.1",
"Microsoft.Extensions.Logging.Debug": "1.1.1",
"Microsoft.Extensions.Options.ConfigurationExtensions": "1.1.1",
"Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.1.0",
"Microsoft.VisualStudio.Web.CodeGeneration.Tools": "1.1.0-preview4-final",
"Microsoft.VisualStudio.Web.CodeGenerators.Mvc": "1.1.0",
"Microsoft.NETCore.App": "1.1.1"},

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

"frameworks": {
"netcoreapp1.1": {
  "imports": [
    "dotnet5.6",
    "portable-net45+win8"]}},

"tools": {
"Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final",
"Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
  "version": "1.1.0-preview4-final",
  "imports": [
    "portable-net45+win8"
  ]
},
"Microsoft.EntityFrameworkCore.Tools.DotNet": "1.1.0-preview4-final"}

要解决它，您应该升级到 .NET Core 1.1

在依赖项中将 Microsoft.NETCore.App 更改为 1.1.1，在框架部分中，netcoreapp1.0 引用将需要更改为 netcoreapp1.1

重要提示:工具包的名称已从 Microsoft.EntityFrameworkCore.Tools 更改为 Microsoft.EntityFrameworkCore.Tools.Dotnet

请同时引用 http://bencoleman.co.uk/dotnet-core-1-1-gotchas/

我还将 Nuget 升级到 3.5 版 Nuget

我希望，它会帮助你。
亲切的问候