$Env:<variable-name> ="<new-value>" 例如,若要创建环境变量,请执行以下操作Foo: PowerShell复制 $Env:Foo='An example' 由于环境变量始终是字符串,因此可以像使用包含字符串的任何其他变量一样使用它们。 例如: PowerShell复制 "The 'Foo' environment variable is set to
Set-Variable -name b -value 99 1. 2. 声明只读变量:(参考New-Variable) New-Variable pi -Value 3.14 -Force -Option readonly New-Variable zero -Value 0 -Force -Option constant 1. 2. Option Description "None" NOoption (default) "ReadOnly" Variablecontents may only be modifie...
but you can't use wildcard characters to find the names of function help and script help articles. To get help for a script that isn't located in a path that's listed in the `$env:Path` environment variable, type the script's path and file name. If you enter the exact name of ...
3.通用参数: 参数由 PowerShell 引擎控制, 通用参数的行为方式始终相同。 通用参数: WhatIf、Confirm、Verbose、Debug、Warn、ErrorAction、ErrorVariable、OutVariable 和 OutBuffer 4.建议的参数名称:PowerShell 核心 cmdlet 使用标准名称 指示计算机的参数的建议名称是 ComputerName,而不是 Server、Host、System、Node ...
'Write-Host'$Env:BUILD_BUILDNUMBER = "Build HelloWorld_0000.00.00.0"'exit1}# Make sure path to source code directory is availableif(-not$Env:BUILD_SOURCESDIRECTORY) {Write-Error("BUILD_SOURCESDIRECTORY environment variable is missing.")exit1}elseif(-not(Test-Path$Env:BUILD_SOURCESDIRECTORY)) ...
'Write-Host'$Env: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)) ...
true -InputObject <System.ServiceProcess.ServiceController[]> Specifies ServiceController objects that represent the services to stop. Enter a variable that contains the objects, or type a command or expression that gets the objects. Required? true Position? 0 Default value None Accept pipeline input...
Set-PSReadLineOption-Colors@{ Command ='Magenta'Number ='DarkGray'Member ='DarkGray'Operator ='DarkGray'Type ='DarkGray'Variable ='DarkGreen'Parameter ='DarkGreen'ContinuationPrompt ='DarkGray'Default ='DarkGray'} 示例5:设置多种类型的颜色值 ...
PowerShell 复制 param( [ValidateDrive("C", "D", "Variable", "Function")] [string]$Path ) ValidateUserDrive 验证属性ValidateUserDrive 属性指定参数值必须在 User 驱动器中表示。 如果路径引用其他驱动器,PowerShell 将生成错误。 验证属性仅测试路径的驱动器前缀是否存在。
variable is: False Now the $? variable is: True 出于后者的目的,应改用 $PSCmdlet.WriteError()。 对于本机命令(可执行文件),当 $? 为0 时, 设置为 $LASTEXITCODE,当 为任何其他值时设置为 $LASTEXITCODE。 备注 在PowerShell 7 之前,用括号 (...)、子表达式语法 $(...)或数组表达式 @(.....