Nuget无法更新.NET Core项目。

Question

我安装了.NET Core并使用ASP.NET Core Web应用程序(.NET Core)模板创建了一个新的VS2015项目。

这个基本项目可以编译和运行，并且在引用部分没有任何奇怪的错误。

然而，NuGet包管理器UI标识出有13个更新。我在PM控制台上大胆/天真地执行了以下命令：

Update-Package

它会输出一长串成功信息，显示在这个问题的底部（为了简洁起见），并更新 project.json 中的版本号。以下是 project.json 的依赖项部分：

  "dependencies": {
    "Microsoft.ApplicationInsights.AspNetCore": "1.0.2",
    "Microsoft.AspNetCore.Mvc": "1.1.0",
    "Microsoft.AspNetCore.Routing": "1.1.0",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.1.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.1.0",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.1.0",
    "Microsoft.Extensions.Configuration.FileExtensions": "1.1.0",
    "Microsoft.Extensions.Configuration.Json": "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": {
      "version": "1.1.0",
      "type": "platform"
    }
  },

在解决方案资源管理器中，软件包版本未更新。

当我重新构建时，会出现大量警告，都是以下格式：

warning NU1007: Dependency specified was Microsoft.AspNetCore.Mvc >= 1.1.0 but ended up with Microsoft.AspNetCore.Mvc 1.0.1.

我不明白为什么NuGet会更新package.json文件，但不更新项目引用。此外，我不知道如何手动修复它。虽然project.json文件已更新，但是project.lock.json文件没有更新，但手动更改那里的版本号会导致警告变成以下形式的错误：

NU1001  The dependency Microsoft.Extensions.Logging.Console >= 1.1.0 could not be resolved.

我正在使用VS2015 Update 3和NuGet 3.5。

我的问题是：

1. 是否有一种方法可以强制NuGet更新项目引用，以便我不会收到这些警告？ 2. 为什么会出现这种情况？ 3. 是否有可靠的解决方法（如手动编辑某些文件）？

以下是从“Update-Package”输出的内容：

Retrieving package 'Microsoft.ApplicationInsights.AspNetCore 1.0.2' from 'nuget.org'.
Retrieving package 'Microsoft.AspNetCore.Mvc 1.1.0' from 'nuget.org'.
Retrieving package 'Microsoft.AspNetCore.Routing 1.1.0' from 'nuget.org'.
Retrieving package 'Microsoft.AspNetCore.Server.IISIntegration 1.1.0' from 'nuget.org'.
Retrieving package 'Microsoft.AspNetCore.Server.Kestrel 1.1.0' from 'nuget.org'.
Retrieving package 'Microsoft.Extensions.Configuration.EnvironmentVariables 1.1.0' from 'nuget.org'.
Retrieving package 'Microsoft.Extensions.Configuration.FileExtensions 1.1.0' from 'nuget.org'.
Retrieving package 'Microsoft.Extensions.Configuration.Json 1.1.0' from 'nuget.org'.
Retrieving package 'Microsoft.Extensions.Logging 1.1.0' from 'nuget.org'.
Retrieving package 'Microsoft.Extensions.Logging.Console 1.1.0' from 'nuget.org'.
Retrieving package 'Microsoft.Extensions.Logging.Debug 1.1.0' from 'nuget.org'.
Retrieving package 'Microsoft.Extensions.Options.ConfigurationExtensions 1.1.0' from 'nuget.org'.
Retrieving package 'Microsoft.NETCore.App 1.1.0' from 'nuget.org'.
Uninstalling NuGet package Microsoft.ApplicationInsights.AspNetCore.1.0.0.
Successfully uninstalled 'Microsoft.ApplicationInsights.AspNetCore.1.0.0' from WebApplication3
Installing NuGet package Microsoft.ApplicationInsights.AspNetCore.1.0.2.
Successfully installed 'Microsoft.ApplicationInsights.AspNetCore 1.0.2' to WebApplication3
Uninstalling NuGet package Microsoft.AspNetCore.Mvc.1.0.1.
Successfully uninstalled 'Microsoft.AspNetCore.Mvc.1.0.1' from WebApplication3
Installing NuGet package Microsoft.AspNetCore.Mvc.1.1.0.
Successfully installed 'Microsoft.AspNetCore.Mvc 1.1.0' to WebApplication3
Uninstalling NuGet package Microsoft.AspNetCore.Routing.1.0.1.
Successfully uninstalled 'Microsoft.AspNetCore.Routing.1.0.1' from WebApplication3
Installing NuGet package Microsoft.AspNetCore.Routing.1.1.0.
Successfully installed 'Microsoft.AspNetCore.Routing 1.1.0' to WebApplication3
Uninstalling NuGet package Microsoft.AspNetCore.Server.IISIntegration.1.0.0.
Successfully uninstalled 'Microsoft.AspNetCore.Server.IISIntegration.1.0.0' from WebApplication3
Installing NuGet package Microsoft.AspNetCore.Server.IISIntegration.1.1.0.
Successfully installed 'Microsoft.AspNetCore.Server.IISIntegration 1.1.0' to WebApplication3
Uninstalling NuGet package Microsoft.AspNetCore.Server.Kestrel.1.0.1.
Successfully uninstalled 'Microsoft.AspNetCore.Server.Kestrel.1.0.1' from WebApplication3
Installing NuGet package Microsoft.AspNetCore.Server.Kestrel.1.1.0.
Successfully installed 'Microsoft.AspNetCore.Server.Kestrel 1.1.0' to WebApplication3
Uninstalling NuGet package Microsoft.Extensions.Configuration.EnvironmentVariables.1.0.0.
Successfully uninstalled 'Microsoft.Extensions.Configuration.EnvironmentVariables.1.0.0' from WebApplication3
Installing NuGet package Microsoft.Extensions.Configuration.EnvironmentVariables.1.1.0.
Successfully installed 'Microsoft.Extensions.Configuration.EnvironmentVariables 1.1.0' to WebApplication3
Uninstalling NuGet package Microsoft.Extensions.Configuration.FileExtensions.1.0.0.
Successfully uninstalled 'Microsoft.Extensions.Configuration.FileExtensions.1.0.0' from WebApplication3
Installing NuGet package Microsoft.Extensions.Configuration.FileExtensions.1.1.0.
Successfully installed 'Microsoft.Extensions.Configuration.FileExtensions 1.1.0' to WebApplication3
Uninstalling NuGet package Microsoft.Extensions.Configuration.Json.1.0.0.
Successfully uninstalled 'Microsoft.Extensions.Configuration.Json.1.0.0' from WebApplication3
Installing NuGet package Microsoft.Extensions.Configuration.Json.1.1.0.
Successfully installed 'Microsoft.Extensions.Configuration.Json 1.1.0' to WebApplication3
Uninstalling NuGet package Microsoft.Extensions.Logging.1.0.0.
Successfully uninstalled 'Microsoft.Extensions.Logging.1.0.0' from WebApplication3
Installing NuGet package Microsoft.Extensions.Logging.1.1.0.
Successfully installed 'Microsoft.Extensions.Logging 1.1.0' to WebApplication3
Uninstalling NuGet package Microsoft.Extensions.Logging.Console.1.0.0.
Successfully uninstalled 'Microsoft.Extensions.Logging.Console.1.0.0' from WebApplication3
Installing NuGet package Microsoft.Extensions.Logging.Console.1.1.0.
Successfully installed 'Microsoft.Extensions.Logging.Console 1.1.0' to WebApplication3
Uninstalling NuGet package Microsoft.Extensions.Logging.Debug.1.0.0.
Successfully uninstalled 'Microsoft.Extensions.Logging.Debug.1.0.0' from WebApplication3
Installing NuGet package Microsoft.Extensions.Logging.Debug.1.1.0.
Successfully installed 'Microsoft.Extensions.Logging.Debug 1.1.0' to WebApplication3
Uninstalling NuGet package Microsoft.Extensions.Options.ConfigurationExtensions.1.0.0.
Successfully uninstalled 'Microsoft.Extensions.Options.ConfigurationExtensions.1.0.0' from WebApplication3
Installing NuGet package Microsoft.Extensions.Options.ConfigurationExtensions.1.1.0.
Successfully installed 'Microsoft.Extensions.Options.ConfigurationExtensions 1.1.0' to WebApplication3
Uninstalling NuGet package Microsoft.NETCore.App.1.0.1.
Successfully uninstalled 'Microsoft.NETCore.App.1.0.1' from WebApplication3
Installing NuGet package Microsoft.NETCore.App.1.1.0.
Successfully installed 'Microsoft.NETCore.App 1.1.0' to WebApplication3
Executing nuget actions took 729.79 ms
Time Elapsed: 00:00:08.2056394

- Cobus Kruger

---

你尝试过 dotnet restore 吗？（https://learn.microsoft.com/pl-pl/dotnet/articles/core/tools/dotnet-restore） 第二件事是你是否拥有最新的 .Net Core。请尝试从 https://www.microsoft.com/net/download/core#/current 下载并安装最新版本。 - J. Doe

@J.Doe 我现在已经做了，它可以工作！我仍然不明白为什么在 NuGet 已经完成其工作之后还需要这样做，但这是另一天的问题。将此提交为答案，我会接受它。 - Cobus Kruger

.NET Core 在 Visual Studio 2015 上的工具仅为预览版，因此并不能完全保证一切正常运行。我个人的建议是仅使用 dotnet 命令行，并暂时避免使用任何可视化部分，比如 NuGet Package Manager，来管理 .NET Core 项目。 - Lex Li

Answer 1

您尝试过 dotnet restore 吗？

其次，请确保您已经安装了最新的 .Net Core。请尝试下载并安装最新版本的 SDK。

- J. Doe