Question

这是我第一次使用Microsoft Visual Studio或.NET Frameworks。

当我第一次尝试构建此解决方案（https://github.com/QuantConnect/Lean）时 - 我在各自的软件上尝试了两个版本的解决方案（VS17和VS15） - 我收到以下错误（在此末尾显示）发布相关原因）。

从这些错误中我得到了恢复nuget软件包的问题，但当我尝试从附带的Nuget软件包管理器控制台安装/重新安装/更新QLNet等软件包时，我得到错误，例如：

PM＆GT;安装包QLNet -Version 1.9.2 尝试针对项目'QuantConnect.Lean.Launcher'收集包'QLNet.1.9.2'的依赖关系信息，定位'.NETFramework，Version = v4.5.2' 尝试使用DependencyBehavior'Lowest'解决包'QLNet.1.9.2'的依赖关系解决安装软件包'QLNet.1.9.2'的操作解决了安装包'QLNet.1.9.2'的操作从'packages.config'中删除了包'QLNet.1.10.0' 已成功从QuantConnect.Lean.Launcher中卸载“QLNet.1.10.0” 包'QLNet.1.9.2'已存在于'C：\ Users \ Work \ QuantConnect \ Lean-master \ packages'文件夹中安装失败。滚回来... 项目'QuantConnect.Lean.Launcher'中不存在包'QLNet.1.9.2' 包'QLNet.1.10.0'已存在于'C：\ Users \ Work \ QuantConnect \ Lean-master \ packages'文件夹中将包'QLNet.1.10.0'添加到'packages.config' 安装包：无法添加对“QLNet”的引用。在行：1个字符：1 +安装包QLNet -Version 1.9.2 + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo：NotSpecified：（:) [Install-Package]，Exception + FullyQualifiedErrorId：NuGetCmdletUnhandledException，NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand

或

PM＆GT;更新包 - 重新安装QLNet 尝试针对项目“QuantConnect”收集多个包的依赖关系信息，进行定位 ” .NETFramework，版本= v4.5.2' 收集依赖信息需要5,32秒试图解决多个包的依赖关系。解析依赖性信息需要0毫秒解决操作会安装多个包在'C：\ Users \ Work \ QuantConnect \ Lean-master \ packages'中找到包'QLNet 1.9.2'。安装失败。滚回来... 执行nuget动作需要3,73秒更新包：找不到中央目录结束记录。在行：1个字符：1 + Update-Package -reinstall QLNet + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo：NotSpecified：（:) [Update-Package]，Exception + FullyQualifiedErrorId：NuGetCmdletUnhandledException，NuGet.PackageManagement.PowerShellCmdlets.UpdatePackageCommand

我还从此页面下载并执行了nuget.exe - recommended latest v4.4.1和VS 2015 VSIX - latest v3.6.0：https://www.nuget.org/downloads，但没有任何变化。

我该怎么办？

（这是我在尝试构建解决方案时得到的结果：

>  1>------ Build started: Project: QuantConnect, Configuration: Debug Any CPU ------
>     1>C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets(1820,5):
> warning MSB3245: Could not resolve this reference. Could not locate
> the assembly "QLNet, Version=1.9.2.0, Culture=neutral,
> processorArchitecture=MSIL". Check to make sure the assembly exists on
> disk. If this reference is required by your code, you may get
> compilation errors.
> 
> 
> 1>C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\ConstantQLDividendYieldEstimator.cs(23,7,23,12):
> error CS0246: The type or namespace name 'QLNet' could not be found
> (are you missing a using directive or an assembly reference?)
>     1>C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\ConstantQLRiskFreeRateEstimator.cs(24,7,24,12):
> error CS0246: The type or namespace name 'QLNet' could not be found
> (are you missing a using directive or an assembly reference?)
>     1>C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\ConstantQLUnderlyingVolatilityEstimator.cs(24,7,24,12):
> error CS0246: The type or namespace name 'QLNet' could not be found
> (are you missing a using directive or an assembly reference?)
>     1>C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\IQLDividendYieldEstimator.cs(18,7,18,12):
> error CS0246: The type or namespace name 'QLNet' could not be found
> (are you missing a using directive or an assembly reference?)
>     1>C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\IQLRiskFreeRateEstimator.cs(18,7,18,12):
> error CS0246: The type or namespace name 'QLNet' could not be found
> (are you missing a using directive or an assembly reference?)
>     1>C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\IQLUnderlyingVolatilityEstimator.cs(18,7,18,12):
> error CS0246: The type or namespace name 'QLNet' could not be found
> (are you missing a using directive or an assembly reference?)
>     1>C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\OptionPriceModels.cs(21,7,21,12):
> error CS0246: The type or namespace name 'QLNet' could not be found
> (are you missing a using directive or an assembly reference?)
>     1>C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\QLOptionPriceModel.cs(20,7,20,12):
> error CS0246: The type or namespace name 'QLNet' could not be found
> (are you missing a using directive or an assembly reference?)
>     1>C:\Users\Work\QuantConnect\Lean-master\Common\TradingCalendar.cs(7,7,7,12):
> error CS0246: The type or namespace name 'QLNet' could not be found
> (are you missing a using directive or an assembly reference?)
>     1>C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\OptionPriceModels.cs(25,46,25,76):
> error CS0246: The type or namespace name
> 'GeneralizedBlackScholesProcess' could not be found (are you missing a
> using directive or an assembly reference?)
>     1>C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\OptionPriceModels.cs(25,78,25,92):
> error CS0246: The type or namespace name 'IPricingEngine' could not be
> found (are you missing a using directive or an assembly reference?)
>     1>C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\QLOptionPriceModel.cs(26,46,26,76):
> error CS0246: The type or namespace name
> 'GeneralizedBlackScholesProcess' could not be found (are you missing a
> using directive or an assembly reference?)
>     1>C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\QLOptionPriceModel.cs(26,78,26,92):
> error CS0246: The type or namespace name 'IPricingEngine' could not be
> found (are you missing a using directive or an assembly reference?)
>     1>C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\QLOptionPriceModel.cs(25,36,25,66):
> error CS0246: The type or namespace name
> 'GeneralizedBlackScholesProcess' could not be found (are you missing a
> using directive or an assembly reference?)
>     1>C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\QLOptionPriceModel.cs(25,68,25,82):
> error CS0246: The type or namespace name 'IPricingEngine' could not be
> found (are you missing a using directive or an assembly reference?)
>     1>C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\QLOptionPriceModel.cs(232,46,232,59): error CS0246: The type or namespace name 'VanillaOption' could not be
> found (are you missing a using directive or an assembly reference?)
>     2>------ Build started: Project: QuantConnect.Indicators, Configuration: Debug Any CPU ------
>     3>------ Build started: Project: QuantConnect.Compression, Configuration: Debug Any CPU ------
>     4>------ Build started: Project: QuantConnect.Queues, Configuration: Debug Any CPU ------
>     5>------ Build started: Project: QuantConnect.Messaging, Configuration: Debug Any CPU ------
>     6>------ Build started: Project: QuantConnect.Api, Configuration: Debug Any CPU ------
>     2>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     7>------ Build started: Project: QuantConnect.Algorithm, Configuration: Debug Any CPU ------
>     7>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     7>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Indicators\bin\Debug\QuantConnect.Indicators.dll'
> could not be found
>     8>------ Build started: Project: QuantConnect.AlgorithmFactory, Configuration: Debug Any CPU ------
>     9>------ Build started: Project: QuantConnect.Algorithm.CSharp, Configuration: Debug Any CPU ------
>     10>------ Skipped Build: Project: QuantConnect.Algorithm.FSharp, Configuration: Debug Any CPU ------
>     10>Project not selected to build for this solution configuration 
>     11>------ Skipped Build: Project: QuantConnect.Algorithm.Python, Configuration: Debug Any CPU ------
>     11>Project not selected to build for this solution configuration 
>     8>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm\bin\Debug\QuantConnect.Algorithm.dll'
> could not be found
>     8>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     3>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     12>------ Build started: Project: QuantConnect.Brokerages, Configuration: Debug Any CPU ------
>     4>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     6>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     13>------ Build started: Project: QuantConnect.VisualStudio15Plugin, Configuration: Debug Any CPU ------
>     5>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     12>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     12>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Compression\bin\Debug\QuantConnect.Compression.dll'
> could not be found
>     9>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm\bin\Debug\QuantConnect.Algorithm.dll'
> could not be found
>     9>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm.Framework\bin\Debug\QuantConnect.Algorithm.Framework.dll'
> could not be found
>     9>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     9>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Indicators\bin\Debug\QuantConnect.Indicators.dll'
> could not be found
>     14>------ Build started: Project: QuantConnect.Lean.Engine, Configuration: Debug Any CPU ------
>     14>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm.CSharp\bin\Debug\QuantConnect.Algorithm.CSharp.dll'
> could not be found
>     14>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm\bin\Debug\QuantConnect.Algorithm.dll'
> could not be found
>     14>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\AlgorithmFactory\bin\Debug\QuantConnect.AlgorithmFactory.dll'
> could not be found
>     14>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Api\bin\Debug\QuantConnect.Api.dll'
> could not be found
>     14>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Brokerages\bin\Debug\QuantConnect.Brokerages.dll'
> could not be found
>     14>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     14>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Compression\bin\Debug\QuantConnect.Compression.dll'
> could not be found
>     14>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Indicators\bin\Debug\QuantConnect.Indicators.dll'
> could not be found
>     15>------ Build started: Project: QuantConnect.ToolBox, Configuration: Debug Any CPU ------
>     16>------ Build started: Project: QuantConnect.Views, Configuration: Release Any CPU ------
>     17>------ Build started: Project: QuantConnect.Jupyter, Configuration: Debug Any CPU ------
>     15>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Brokerages\bin\Debug\QuantConnect.Brokerages.dll'
> could not be found
>     15>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     15>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Compression\bin\Debug\QuantConnect.Compression.dll'
> could not be found
>     15>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Engine\bin\Debug\QuantConnect.Lean.Engine.dll'
> could not be found
>     18>------ Build started: Project: QuantConnect.Lean.Launcher, Configuration: Debug Any CPU ------
>     13>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Api\bin\Debug\QuantConnect.Api.dll'
> could not be found
>     13>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     18>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm.CSharp\bin\Debug\QuantConnect.Algorithm.CSharp.dll'
> could not be found
>     18>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm\bin\Debug\QuantConnect.Algorithm.dll'
> could not be found
>     18>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\AlgorithmFactory\bin\Debug\QuantConnect.AlgorithmFactory.dll'
> could not be found
>     18>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Api\bin\Debug\QuantConnect.Api.dll'
> could not be found
>     18>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Brokerages\bin\Debug\QuantConnect.Brokerages.dll'
> could not be found
>     18>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     18>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Compression\bin\Debug\QuantConnect.Compression.dll'
> could not be found
>     18>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Indicators\bin\Debug\QuantConnect.Indicators.dll'
> could not be found
>     18>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Engine\bin\Debug\QuantConnect.Lean.Engine.dll'
> could not be found
>     18>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Messaging\bin\Debug\QuantConnect.Messaging.dll'
> could not be found
>     18>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Queues\bin\Debug\QuantConnect.Queues.dll'
> could not be found
>     18>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\ToolBox\bin\Debug\QuantConnect.ToolBox.exe'
> could not be found
>     19>------ Build started: Project: QuantConnect.Tests, Configuration: Debug Any CPU ------
>     17>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm\bin\Debug\QuantConnect.Algorithm.dll'
> could not be found
>     17>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Api\bin\Debug\QuantConnect.Api.dll'
> could not be found
>     17>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     17>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Indicators\bin\Debug\QuantConnect.Indicators.dll'
> could not be found
>     17>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Engine\bin\Debug\QuantConnect.Lean.Engine.dll'
> could not be found
>     17>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Queues\bin\Debug\QuantConnect.Queues.dll'
> could not be found
>     16>C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets(1820,5):
> warning MSB3270: There was a mismatch between the processor
> architecture of the project being built "MSIL" and the processor
> architecture of the reference "Geckofx-Core, Version=45.0.6.0,
> Culture=neutral, PublicKeyToken=3209ac31600d1857,
> processorArchitecture=x86", "x86". This mismatch may cause runtime
> failures. Please consider changing the targeted processor architecture
> of your project through the Configuration Manager so as to align the
> processor architectures between your project and references, or take a
> dependency on references with a processor architecture that matches
> the targeted processor architecture of your project.
>     16>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm.CSharp\bin\Debug\QuantConnect.Algorithm.CSharp.dll'
> could not be found
>     16>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm\bin\Debug\QuantConnect.Algorithm.dll'
> could not be found
>     16>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Api\bin\Debug\QuantConnect.Api.dll'
> could not be found
>     16>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     16>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Engine\bin\Debug\QuantConnect.Lean.Engine.dll'
> could not be found
>     16>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Messaging\bin\Debug\QuantConnect.Messaging.dll'
> could not be found
>     16>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Queues\bin\Debug\QuantConnect.Queues.dll'
> could not be found
>     19>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm.CSharp\bin\Debug\QuantConnect.Algorithm.CSharp.dll'
> could not be found
>     19>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm\bin\Debug\QuantConnect.Algorithm.dll'
> could not be found
>     19>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\AlgorithmFactory\bin\Debug\QuantConnect.AlgorithmFactory.dll'
> could not be found
>     19>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Api\bin\Debug\QuantConnect.Api.dll'
> could not be found
>     19>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Brokerages\bin\Debug\QuantConnect.Brokerages.dll'
> could not be found
>     19>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
> could not be found
>     19>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Compression\bin\Debug\QuantConnect.Compression.dll'
> could not be found
>     19>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Indicators\bin\Debug\QuantConnect.Indicators.dll'
> could not be found
>     19>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Engine\bin\Debug\QuantConnect.Lean.Engine.dll'
> could not be found
>     19>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Launcher\bin\Debug\QuantConnect.Lean.Launcher.exe'
> could not be found
>     19>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Messaging\bin\Debug\QuantConnect.Messaging.dll'
> could not be found
>     19>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Queues\bin\Debug\QuantConnect.Queues.dll'
> could not be found
>     19>CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\ToolBox\bin\Debug\QuantConnect.ToolBox.exe'
> could not be found
>     ========== Build: 0 succeeded, 17 failed, 2 up-to-date, 2 skipped ==========
> 
>

）

Answer 1

无法恢复VS17和VS15上的nuget包

您应该在构建解决方案之前恢复nuget包。

通常，当我们将解决方案分享给其他人时，我们会忽略packages文件夹。因此，在您下载该解决方案后，您将找到文件夹：C:\Users\Work\QuantConnect\Lean-master\packages缺失。

您应该右键单击解决方案，选择还原NuGet包。恢复完成后，您可以构建解决方案而不会出现该错误：

您可以检查该文件夹以确认包是否已恢复。

对于您的问题，我建议您删除packages文件夹，然后通过选择＆＃34; Restore NuGet Packages＆＃34;来恢复软件包。

顺便说一下，软件包还原主要通过工具＆gt;启用。选项＆gt; Visual Studio中的NuGet包管理器：

有关详细信息，请参阅Package Restore。

无法在VS17和VS15

1 个答案: