从 ASP.NET 5 Beta 4 升级到 Beta 5 时出错

问题描述

我已按照步骤 此处 从 ASP.NET 5 Beta 4 升级到 Beta 5，但在调用 application.UseBrowserLink(); 时在运行时出错；:

I have followed the steps here to upgrade from ASP.NET 5 Beta 4 to Beta 5 but am getting an error at runtime when calling application.UseBrowserLink();:

System.TypeLoadException"类型的异常发生在mscorlib.dll 但未在用户代码中处理

An exception of type 'System.TypeLoadException' occurred in mscorlib.dll but was not handled in user code

附加信息:无法加载类型程序集中的Microsoft.AspNet.Builder.IApplicationBuilder"'Microsoft.AspNet.Http，版本=1.0.0.0，文化=中性，PublicKeyToken=null'.

Additional information: Could not load type 'Microsoft.AspNet.Builder.IApplicationBuilder' from assembly 'Microsoft.AspNet.Http, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.

这些是我遵循的步骤:

1. 已经安装了 VS 2015 RC.
2. 从 PowerShell 运行:$env:DNX_FEED="https://www.nuget.org/api/v2"
3. 从 PowerShell 运行:dnvm 升级

4. 添加了一个 Global.json 文件(我还没有).当我添加它时，它已经提到了 Beta 5:

1. Had VS 2015 RC already installed.
2. From PowerShell run: $env:DNX_FEED="https://www.nuget.org/api/v2"
3. From PowerShell run: dnvm upgrade

4. Added a Global.json file (I did not already have one). When I added it, it referred to Beta 5 already:

{
    "projects": [ "Source", "Tests" ],
    "sdk": {
        "version": "1.0.0-beta5-12103"
    }
}

{
  "dependencies": {
    "Boilerplate.Web.Mvc6": "1.0.2",
    "Microsoft.AspNet.Diagnostics": "1.0.0-beta5",
    "Microsoft.AspNet.Mvc": "6.0.0-beta5",
    "Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-beta5",
    "Microsoft.AspNet.Mvc.Xml": "6.0.0-beta5",
    "Microsoft.AspNet.Server.IIS": "1.0.0-beta5",
    "Microsoft.AspNet.Server.WebListener": "1.0.0-beta5",
    "Microsoft.AspNet.StaticFiles": "1.0.0-beta5",
    "Microsoft.AspNet.Tooling.Razor": "1.0.0-beta5",
    "Microsoft.Framework.CodeGenerators.Mvc": "1.0.0-beta5",
    "Microsoft.Framework.Configuration.EnvironmentVariables": "1.0.0-beta5",
    "Microsoft.Framework.Configuration.Json": "1.0.0-beta5",
    "Microsoft.Framework.Configuration.UserSecrets": "1.0.0-beta5",
    "Microsoft.Framework.Logging": "1.0.0-beta5",
    "Microsoft.Framework.Logging.Console": "1.0.0-beta5",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-beta5",
    "Newtonsoft.Json": "6.0.6",
    "System.Runtime": "4.0.20-beta-23019"
  }
  "frameworks": {
      "dnx451": {
        "frameworkAssemblies": {
          "System.Net.Http": "4.0.0.0",
          "System.ServiceModel": "4.0.0.0"
        }
      },
      "dnxcore50": {
        "dependencies": {
          "System.Net.Http": "4.0.0-beta-23019"
        }
      }
    }
}

更新

这似乎是浏览器链接的问题，注释掉该行可以使网站正常工作.可能坏了?需要寻找 aspnet GitHub 问题.

It seems to be a problem with browser link, commenting the line out allows the site to work. It may be broken? Need to hunt around the aspnet GitHub issues.

推荐答案

为了帮助您从 beta4 迁移到 beta5，这些是我根据研究/发现采取的以下步骤.

In order to help you migrate from beta4 to beta5, these are the following steps it took me, based on the research/findings.

• PowerShell 运行:$env:DNX_FEED="https://www.nuget.org/api/v2"
• PowerShell 运行:dnvm install 1.0.0-beta5
• PowerShell 运行:dnvm 使用 1.0.0-beta5 -p(不确定是否需要，但我必须这样做)

• 打开 global.json 并将 sdk 更新为 1.0.0-beta5 应该如下所示:

• Open global.json and update sdk to 1.0.0-beta5 should look like this:

{
    "projects": [ "src", "test" ],
    "sdk": {
        "version": "1.0.0-beta5"
    }
}

"Microsoft.Framework.ConfigurationModel.Json": "1.0.0-beta4"

"Microsoft.Framework.Configuration": "1.0.0-beta5",
"Microsoft.Framework.Configuration.Json": "1.0.0-beta5"

• 更改配置的重大更改

• Change Configuration breaking changes

• 将命名空间从 using Microsoft.Framework.ConfigurationModel; 更改为 using Microsoft.Framework.Configuration;

将 Configuration.GetSubKey 更改为 Configuration.GetConfigurationSection

将 CTOR 更改为:

Change CTOR to:

public Startup(IHostingEnvironment env, IApplicationEnvironment appEnv)
{           
    // Setup configuration sources.
    var configBuilder = new ConfigurationBuilder(appEnv.ApplicationBasePath)
    .AddJsonFile("config.json")
    .AddEnvironmentVariables();

    Configuration = configBuilder.Build();
}

• 在应用根目录
中打开 PowerShell
• 运行dnu restore
• 运行 dnu 构建
• 此时关闭和重新打开 VS 有时会有所帮助.

我自己发现升级现有项目非常困难，无法找到所需的所有步骤.希望对您有所帮助！

Myself found it quite difficult to upgrade an existing project, couldn't find all steps required all together. Hope it helps!

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