为已有的几个项目添加了一个nuget package 后，在解决方法中添加了一个新项目，然后想把这个nuget package添加到这个新建的项目中去，可以此时无法添加。

 

 

怎么办那？

【解决方法】

There's 3 approaches :).

In NuGet 1.1 (The latest release) we've improved powershell pipelining so you can do this:

Get-Project -All | Install-Package SomePackage

That will install "SomePackage" into all of your projects. You can use wildcards to narrow down which projects:

Get-Project Mvc* | Install-Package SomePackage

That will use wildcard semantics (in this case, find all projects that start with mvc).

Get-Project SomeProject | Install-Package SomePackage

That will install SomePackage into SomeProject and nothing else.

 

 

如果在运行的时候出现如下的提示：

<Project name> already has a reference to <Package>.

那就检查一下项目的package.config文件，如果已经有了引用，就删掉。另外也看一下项目的references，如果有了，也删掉。

 

如果在运行命令的时候，出现了如下的错误信息。

Install-Package : An error occurred while loading packages

from'https://www.nuget.org/api/v2/curated-feeds/microsoftdotnet/': The underlying connection was closed: Could not

establish trust relationship for the SSL/TLS secure channel.

At line:1 char:45

+ Get-Project NotesDataExporterCloud.Common | Install-Package Newtonsoft.Json

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

+ CategoryInfo : NotSpecified: (:) [Install-Package], InvalidOperationException

+ FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PowerShell.Commands.InstallPackageCommand

 

原因是的证书过期了，解决方法是添加自己的Package Source.

 

注意machine-wide package sources 下面的checkbox一定要勾掉，不然的话运行命令的时候会用这个来链接Nuget,还是会报证书的错误。