windows Powershell 添加系统变量
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Powershell Add System Variable
提问by Tyler S
I am Trying To add a System Variable here using PowerShell:
我正在尝试使用 PowerShell 在此处添加系统变量：
I have tried both ways using
我已经尝试了两种方式使用
$env:MyTestVariable = "My test variable."
and
和
[Environment]::SetEnvironmentVariable("TestVariableName", "My Value", "<option>")
However neither of them seem to add to this section. I have tried restarting the computer as well to see if it would take effect then. I have looked at technet along with countless other websites, but nothing I have tried has worked.
但是，它们似乎都没有添加到本节中。我也尝试过重新启动计算机，看看它是否会生效。我已经查看了 technet 和无数其他网站，但我尝试过的一切都没有奏效。
How can I set a system variable with PowerShell?
如何使用 PowerShell 设置系统变量？
回答by TessellatingHeckler
Run PowerShell as an administrator (to get the necessary registry access permissions) then call out to the .Net framework to set it:
以管理员身份运行 PowerShell（以获得必要的注册表访问权限），然后调用 .Net 框架进行设置：
[Environment]::SetEnvironmentVariable("MyTestVariable", "MyTestValue", "Machine")
NB. it won't take effect within the same process, you'll have to make a new PowerShell process to see it.
注意。它不会在同一进程中生效，您必须创建一个新的 PowerShell 进程才能看到它。
回答by Gaspare Bonventre
Run PowerShell as an admin. Don't use this if you are trying to modify something like environmental extensions or environmental paths. No need to run refreshEnv and no need to open a new PowerShell window to see it
以管理员身份运行 PowerShell。如果您尝试修改诸如环境扩展或环境路径之类的内容，请不要使用它。无需运行 refreshEnv 也无需打开新的 PowerShell 窗口即可查看
$variableNameToAdd = "mytestVariableName"
$variableValueToAdd = "some environmental value to add"
[System.Environment]::SetEnvironmentVariable($variableNameToAdd, $variableValueToAdd, [System.EnvironmentVariableTarget]::Machine)
[System.Environment]::SetEnvironmentVariable($variableNameToAdd, $variableValueToAdd, [System.EnvironmentVariableTarget]::Process)
[System.Environment]::SetEnvironmentVariable($variableNameToAdd, $variableValueToAdd, [System.EnvironmentVariableTarget]::User)
回答by NIK
You can find a cool explanation of this below,
你可以在下面找到一个很酷的解释，
https://trevorsullivan.net/2016/07/25/powershell-environment-variables/
https://trevorsullivan.net/2016/07/25/powershell-environment-variables/
