ASP.NET Core 1.0 EF7 System.Data.SqlClient 未找到

Question

今天我尝试将我的 asp.net core 1.0 项目部署到我的服务器上。我在 Visual Studio 中制作了一个 FileSystemDeploy 并将其传输到我的服务器。我想在 docker 容器中运行网站。 我正在使用 microsoft/aspnet:1.0.0-rc1-update1-coreclr。

只是为了测试，我使用以下命令启动了 docker 映像：

docker run -it --name JamesWeb -v ~/James/James.Web:/root --net=host microsoft/aspnet:1.0.0-rc1-update1-coreclr

然后我做了一个 dnu restore，它按预期工作。之后，我使用 dnu web 启动了该应用程序。到目前为止，控制台中没有错误。当我打开网站时，起始页也在工作，但是当我尝试转到使用 DatabaseContext 的页面时，我收到一条错误消息：

fail: Microsoft.Data.Entity.Query.Internal.QueryCompiler[1]
  An exception occurred in the database while iterating the results of a query.
  System.IO.FileNotFoundException: Could not load file or assembly 'System.Data.SqlClient, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

  File name: 'System.Data.SqlClient, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' ---> System.IO.FileNotFoundException: Could not load the specified file.
  File name: 'System.Data.SqlClient'
     at System.Runtime.Loader.AssemblyLoadContext.LoadFromAssemblyName(AssemblyName assemblyName)
     at System.Runtime.Loader.AssemblyLoadContext.Resolve(IntPtr gchManagedAssemblyLoadContext, AssemblyName assemblyName)
     at Microsoft.Data.Entity.Storage.Internal.SqlServerConnection.CreateDbConnection()
     at Microsoft.Data.Entity.Internal.LazyRef`1.get_Value()
     at Microsoft.Data.Entity.Storage.RelationalConnection.Open()
     at Microsoft.Data.Entity.Query.Internal.QueryingEnumerable.Enumerator.MoveNext()
     at System.Linq.Enumerable.SelectEnumerableIterator`2.MoveNext()
     at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext()
     at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
     at lambda_method(Closure , QueryContext )
     at Microsoft.Data.Entity.Query.Internal.QueryCompiler.<>c__DisplayClass18_1`1.<CompileQuery>b__1(QueryContext qc)

我正在为 DBContext 使用以下 连接字符串：

"Server=(localdb)\\mssqllocaldb;Database=James-Web;Trusted_Connection=True;MultipleActiveResultSets=true"

运行 dnx ef database update 以应用迁移的输出：

File name: 'System.Data.SqlClient, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' ---> System.IO.FileNotFoundException: Could not load the specified file.
File name: 'System.Data.SqlClient'
   at System.Runtime.Loader.AssemblyLoadContext.LoadFromAssemblyName(AssemblyName assemblyName)
   at System.Runtime.Loader.AssemblyLoadContext.Resolve(IntPtr gchManagedAssemblyLoadContext, AssemblyName assemblyName)
   at Microsoft.Data.Entity.Storage.Internal.SqlServerConnection.CreateDbConnection()
   at Microsoft.Data.Entity.Internal.LazyRef`1.get_Value()
   at Microsoft.Data.Entity.Migrations.Internal.Migrator.Migrate(String targetMigration)
   at Microsoft.Data.Entity.Design.MigrationsOperations.UpdateDatabase(String targetMigration, String contextType)
   at Microsoft.Data.Entity.Commands.Program.Executor.Execute(Action action)
Could not load file or assembly 'System.Data.SqlClient, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

project.json：

{
  "userSecretsId": "aspnet5-James.Web-9bb7a5b0-c3f5-4309-984f-5c6057584cb5",
  "webroot": "wwwroot",
  "version": "1.0.0-*",
  "compilationOptions": {
    "emitEntryPoint": true
  },

  "dependencies": {
    "EntityFramework.Commands": "7.0.0-rc1-final",
    "EntityFramework.MicrosoftSqlServer": "7.0.0-rc1-final",
    "Microsoft.ApplicationInsights.AspNet": "1.0.0-rc1",
    "Microsoft.AspNet.Authentication.Cookies": "1.0.0-rc1-final",
    "Microsoft.AspNet.Diagnostics.Entity": "7.0.0-rc1-final",
    "Microsoft.AspNet.Identity.EntityFramework": "3.0.0-rc1-final",
    "Microsoft.AspNet.IISPlatformHandler": "1.0.0-rc1-final",
    "Microsoft.AspNet.Mvc": "6.0.0-rc1-final",
    "Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-rc1-final",
    "Microsoft.AspNet.Server.Kestrel": "1.0.0-rc1-final",
    "Microsoft.AspNet.StaticFiles": "1.0.0-rc1-final",
    "Microsoft.AspNet.Tooling.Razor": "1.0.0-rc1-final",
    "Microsoft.Extensions.CodeGenerators.Mvc": "1.0.0-rc1-final",
    "Microsoft.Extensions.Configuration.FileProviderExtensions": "1.0.0-rc1-final",
    "Microsoft.Extensions.Configuration.Json": "1.0.0-rc1-final",
    "Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-rc1-final",
    "Microsoft.Extensions.Logging": "1.0.0-rc1-final",
    "Microsoft.Extensions.Logging.Console": "1.0.0-rc1-final",
    "Microsoft.Extensions.Logging.Debug": "1.0.0-rc1-final",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-rc1-final",
    "Microsoft.AspNet.Authentication.Facebook": "1.0.0-rc1-final",
    "Microsoft.AspNet.Authentication.Google": "1.0.0-rc1-final"
  },

  "frameworks": {
    "dnx451": {
      "frameworkAssemblies": {
        "System.IO.Compression": "4.0.0.0",
        "System.IO.Compression.FileSystem": "4.0.0.0"
      }
    },
    "dnxcore50": {
      "dependencies": {
        "System.IO.Compression.ZipFile": "4.0.1-beta-23516"
      }
    }
  },

  "commands": {
    "web": "Microsoft.AspNet.Hosting --server Microsoft.AspNet.Server.Kestrel --server.urls http://localhost:5000",
    "ef": "EntityFramework.Commands"
  },

  "exclude": [
    "wwwroot",
    "node_modules"
  ],
  "publishExclude": [
    "**.user",
    "**.vspscc"
  ],
  "scripts": {
    "prepublish": [ "npm install", "bower install", "gulp clean", "gulp min" ]
  }
}

Answer 1

这是 RC1 中 DNX 准备发布申请的方式中的一个已知问题。据我所知，RC1 没有解决方法。这应该在 RC2 中修复。见https://github.com/aspnet/dnx/issues/3316和https://github.com/dotnet/cli/issues/881