PowerShell 变量提供程序创建一个Variable:驱动器,该驱动器的外观和行为类似于文件系统驱动器,但它包含会话中的变量及其值。 若要更改为Variable:驱动器,请使用以下命令: PowerShell Set-LocationVariable: 若要列出驱动器中的Variable:项和变量,请使用Get-Item或Get-ChildItemcmdlet。 Po
Remove-Variable Clear-Variable 备注 还可以使用 PowerShell 表达式分析程序来创建、查看和更改变量的值,而无需使用 cmdlet。 直接使用变量时,请使用美元符号 ($) 将名称标识为变量,赋值运算符 (=) 来建立和更改其值。 例如, $p = Get-Process 创建 变量并将 p 命令的结果 Get-Process 存储在其中。 此...
about_Properties 2023/11/14 本文内容 简短说明 长说明 属性值 成员访问枚举 另请参阅 简短说明 介绍如何在 PowerShell 中使用对象属性。 长说明 PowerShell 使用称为 对象的结构化信息集合来表示数据存储中的项或计算机的状态。 通常,可以使用属于 Microsoft .NET Framework的对象,但也可以在 PowerShell 中创建自...
Set-Variable AB A,B参数“A”、“B” (数组) CMD /CECHO A,B参数“A,B” (字符串) CMD /CECHO $AB表达式“A B” (数组) CMD /CECHO :$AB参数“:A B” (字符串) 从PowerShell 运行本机命令时,首先由 PowerShell 分析参数。 然后,将分析的参数联接到单个字符串中,每个参数用空格分隔。
{ Write-Error "BUILD_SOURCESDIRECTORY does not exist: $Env:BUILD_SOURCESDIRECTORY" exit 1 } Write-Verbose "BUILD_SOURCESDIRECTORY: $Env:BUILD_SOURCESDIRECTORY" # Make sure there's a build number if (-not $Env:BUILD_BUILDNUMBER) { Write-Error ("BUILD_BUILDNUMBER environment variable is ...
Example 5: Get the CIM instances with only key properties filled in This example creates a new CIM instance in memory for a class namedWin32_Processwith the key property@{ "Handle"=0 }and stores it in a variable named$x. The variable is passed as a CIM instance to theGet-CimInstancecm...
Note that it may be safer to query the rules with theGetcommand and save it in a variable, observe the rules to be affected, then pipe them to theRemovecommand, just as we did for theSetcommands. The following example shows how the administrator can view all the blocking firewall rules...
Get-Help Start-Service -Parameter * Start-Service cmdlet 的帮助显示,只有 InputObject 和名称参数接受管道输入。 Output 复制 -InputObject <ServiceController[]> Specifies ServiceController objects representing the services to be started. Enter a variable that contains the objects, or type a command or...
But if you need to determine whether a variable is $null, you must put $null on the left-hand side of the equality operator. Putting it on the right-hand side doesn't do what you expect. For example, let $a be an array containing null elements: PowerShell Copy $a = 1, 2...
This is the full path to the file that Windows PowerShell will try to run when it starts. Notice we said “try” to run. Here’s an interesting fact: just because you were able to find the profile doesn’t mean it actually exists. $profile is simply a built-in variable that contains...