c# - ASP.NET vNext-MissingMethodException : Method not found: Microsoft. CodeAnalysis.Diagnostic> EmitResult.get_Diagnostics()'

我今天早上升级到VS2015 RC，并使用ASP.NET 5模板-网站创建了一个新项目。我有一个无法解决的错误:



这是完整的错误堆栈:



我的project.json文件与模板中提供的文件相同:

{
  "webroot": "wwwroot",
  "userSecretsId": "aspnet5-WebApplication2-2819f43f-7688-4637-89a0-d22341b36a64",
  "version": "1.0.0-*",

  "dependencies": {
    "EntityFramework.SqlServer": "7.0.0-beta4",
    "EntityFramework.Commands": "7.0.0-beta4",
    "Microsoft.AspNet.Mvc": "6.0.0-beta4",
    "Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-beta4",
    "Microsoft.AspNet.Authentication.Cookies": "1.0.0-beta4",
    "Microsoft.AspNet.Authentication.Facebook": "1.0.0-beta4",
    "Microsoft.AspNet.Authentication.Google": "1.0.0-beta4",
    "Microsoft.AspNet.Authentication.MicrosoftAccount": "1.0.0-beta4",
    "Microsoft.AspNet.Authentication.Twitter": "1.0.0-beta4",
    "Microsoft.AspNet.Diagnostics": "1.0.0-beta4",
    "Microsoft.AspNet.Diagnostics.Entity": "7.0.0-beta4",
    "Microsoft.AspNet.Identity.EntityFramework": "3.0.0-beta4",
    "Microsoft.AspNet.Server.IIS": "1.0.0-beta4",
    "Microsoft.AspNet.Server.WebListener": "1.0.0-beta4",
    "Microsoft.AspNet.StaticFiles": "1.0.0-beta4",
    "Microsoft.AspNet.Tooling.Razor": "1.0.0-beta4",
    "Microsoft.Framework.ConfigurationModel.Json": "1.0.0-beta4",
    "Microsoft.Framework.ConfigurationModel.UserSecrets": "1.0.0-beta4",
    "Microsoft.Framework.CodeGenerators.Mvc": "1.0.0-beta4",
    "Microsoft.Framework.Logging": "1.0.0-beta4",
    "Microsoft.Framework.Logging.Console": "1.0.0-beta4",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-beta4"
  },

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

  "frameworks": {
    "dnx451": { },
    "dnxcore50": { }
  },

  "exclude": [
    "wwwroot",
    "node_modules",
    "bower_components"
  ],
  "publishExclude": [
    "node_modules",
    "bower_components",
    "**.xproj",
    "**.user",
    "**.vspscc"
  ],
  "scripts": {
    "postrestore": [ "npm install", "bower install" ],
    "prepare": [ "gulp copy" ]
  }
}

当我运行dnvm list命令时:

> dnvm list

Active Version              Runtime Architecture Location                     Alias
------ -------              ------- ------------ --------                     -----
       1.0.0-beta4          clr     x64          <mypath>\.dnx\packages
       1.0.0-beta4          clr     x86          <mypath>\.dnx\packages
       1.0.0-beta4          coreclr x64          <mypath>\.dnx\packages
       1.0.0-beta4          coreclr x86          <mypath>\.dnx\packages
       1.0.0-beta5-11596    clr     x86          <mypath>\.dnx\packages
  *    1.0.0-beta5-11624    clr     x86          <mypath>\.dnx\packages       default

我也尝试使用1.0.0-beta5-11596和1.0.0-beta4 clr，但得到的结果相同。

任何想法？

谢谢。

最佳答案

我认为David是对的，我遇到了同样的问题，并且能够通过以下方式解决此问题:

打开％USERPROFILE％\。dnx目录

删除软件包目录

中的所有内容

从运行时目录

中删除beta5目录

更改别名dir中defaults.txt的值以指向beta4运行时之一

完成此操作后，我打开了备份项目，软件包成功还原，并且能够运行该应用程序。无论出于何种原因，defaults.txt均出于任何原因都指向beta5运行时，假设在使用命令行工具时已将其设置为某个时间。

希望对您也有用!