[Environment]::SetEnvironmentVariable('Foo','Bar') [Environment]::GetEnvironmentVariable('Foo') Output复制 Bar 可以通过为变量的值指定空字符串,使用SetEnvironmentVariable()方法删除环境变量。 例如,若要删除环境变量,请执行以下操作Foo: PowerShell
作为一种语言,PowerShell 在版本间的工作方式相同;它是你使用的受版本兼容性影响的 cmdlet、模块和 .NET API。 通常,在 PowerShell 6.1 及更高版本中工作的脚本适用于 Windows PowerShell 5.1,但也有一些例外情况。 PSScriptAnalyzer版本 1.18+ 具有PSUseCompatibleCommands和PSUseCompatibleTypes等规则,这...
In an expression use this syntax: $env:VariableName = 'new-value' For example, to append "finance" to the value of the TEAMS environment variable: $env:TEAMS = $env:TEAMS + "finance" You can also change environment variables with Set-Item, Remove-Item, and Copy-Item. Set-Item -...
Get-PSDrive [[-Name] <String[]>] [-Scope <String>] [-PSProvider <String[]>] [-V erbose] [-Debug] [-ErrorAction <ActionPreference>] [-ErrorVariable <String>] [- OutVariable <String>] [-OutBuffer <Int32>] 使用PSProvider 参数,可以仅显示受特定提供程序支持的 PowerShell 驱动器。 例如...
BUILD_BUILDNUMBER = "Build HelloWorld_0000.00.00.0"'exit1}# Make sure path to source code directory is availableif(-not$Env:BUILD_SOURCESDIRECTORY) {Write-Error("BUILD_SOURCESDIRECTORY environment variable is missing.")exit1}elseif(-not(Test-Path$Env:BUILD_SOURCESDIRECTORY)) {Write-Error"BUILD...
Referencing Variables and Variable Values Removing Items From Arrays The String’s the Thing Three Things You Might Not Know About Windows PowerShell Functions Using Windows PowerShell “Here-Strings” Using the Range Operator in Wildcard Queries What Is (and What Isn’t) in Our Array? Windows ...
Again, if you use SetEnvironmentVariable the deleted variable might still show up when you call Get-ChildItem, at least until you restart. But take our word for it: the environment variable will no longer exist, as this command will demonstrate: ...
Allow empty prefix string in Import-Module -Prefix to override default prefix in manifest (#20409) (Thanks @MartinGC94!) Update variable/property assignment completion so it can fallback to type inference (#21134) (Thanks @MartinGC94!) Use Get-Help approach to find about_*.help.txt files...
"The 'Foo' environment variable is set to: $Env:Foo" $Env:Foo += '!' $Env:Foo Output Kopiuj The 'Foo' environment variable is set to: An example An example! W programie PowerShell nie można ustawić zmiennej środowiskowej na pusty ciąg. Ustawienie zmiennej środowis...
This will also return a true condition because the-matchoperation seeks a matching regular expression anywhere in the string. Every time you use the-matchoperator and it returns a true condition, then PowerShell also creates the$Matchesvariable. In the example, if you enter the$Matchesvaria...