我试图使用nopCommerce(这是写在。net核心)，但当我想运行项目时，我面临52个错误告诉我运行一个nuget包恢复
Assets文件~\obj\project.assets。Json没有找到。运行NuGet包还原生成此文件。Nop.Web.MVC.Testsote
当我使用右键单击解决方案并选择恢复Nuget包时，我得到这样的消息:
所有的包都已经安装，没有什么要恢复的。
但是这52个错误仍然存在，在工具-> NuGet包管理器->管理解决方案的NuGet包中，解决方案上没有安装任何东西，我最近更新了我的VS2017到15.5.4
当前回答
For me it turned out to be a nuget source credentials problem. I had recently changed my password for accessing a nexus server and visual studio was still using the old password when trying to access a nuget on that server through the windows credential manager. To fix it, I had to delete the entry for those outdated credentials in the credential manager and after, when I did a nuget restore, it prompted me for a password letting me enter the new password, which got saved in the credential manager again. You can access the credential manager from the cmd line using CmdKey.exe.
其他回答
通过添加/t:Restore;Build到MSBuild参数解决
For me it turned out to be a nuget source credentials problem. I had recently changed my password for accessing a nexus server and visual studio was still using the old password when trying to access a nuget on that server through the windows credential manager. To fix it, I had to delete the entry for those outdated credentials in the credential manager and after, when I did a nuget restore, it prompted me for a password letting me enter the new password, which got saved in the credential manager again. You can access the credential manager from the cmd line using CmdKey.exe.
If this error occurs as part of a build in Azure DevOps (TFS) and your build already has a NuGet restore task, this error may indicate the NuGet restore task was not able to restore all packages, especially if you use a custom package source (such as an internal NuGet server). Adding /t:Restore;Build to the MSBuild Arguments seems to be one way to resolve the error, but this asks MSBuild to perform an additional NuGet restore operation. I believe this succeeds because MSBuild uses the custom package source configured in Visual Studio. A preferable solution is to fix the NuGet restore task.
为NuGet恢复任务配置一个自定义包源。
创建一个NuGet。列出所有包源(Microsoft Visual Studio Offline Packages, nuget.org和您的自定义包源)的配置文件，并将其添加到源代码控制中。 在Nuget还原任务下的Feeds to use:在我的Nuget .config中选择Feeds选项。 提供NuGet.config的路径。 从MSBuild任务中移除/t:Restore;Build选项。
更多信息可以在这里找到。
使用VSTS时，检查全局。json文件。我输入的sdk版本只是“2.2”，这导致了一个解析错误(但在本地构建时没有)。添加完整版本后，“2.2.104”解决了这个问题。
造成这个缺陷的原因:你必须在文件资源管理器中删除注入的Nuget。 解决方案:一旦你在你的系统中删除了Nuget，然后从下面的位置删除。 选择工具=>选项=>NuGet包管理器=>包源，然后取消勾选Microsoft Visual Studio离线包选项
