Parametersare defined by the names that appear in a function definition, whereasargumentsare the values actually passed to a function when calling it. Parameters define whatkind of argumentsa function can accept. For example, given the function definition: def func(foo, bar=None, **kwargs): pa...
param( [Parameter(Mandatory, ValueFromPipelineByPropertyName)] [string[]]$ComputerName ) 请考虑使用此参数实现函数: PowerShell 复制 function Test-ValueFromPipelineByPropertyName{ param( [Parameter(Mandatory, ValueFromPipelineByPropertyName)] [string[]]$ComputerName ) Write-Output -Inp...
If you create a function at the command line and then import a function with the same name, the original function is replaced. Finding hidden commands The ALL parameter of the Get-Command cmdlet gets all commands with the specified name, even if they're hidden or replaced. Beginning in ...
Named parameters make it easier to call a function if you use meaningful names. This is also helped by the fact that the order of the arguments doesn’t matter. However, if you want to work without parameter names, you have to pass them in the exact order that you declared them. Altern...
helpGet-Help-ParameterName 說明信息顯示Name參數是位置,且必須在位置上指定在第一個位置 (位置零) 中。 Output -Name <System.String> Gets help about the specified command or concept. Enter the name of a cmdlet, function, provider, script, or workflow, such as `Get-Member`, a conceptual article...
{"ModuleLogging": {"EnableModuleLogging":true,"ModuleNames": ["PSReadLine","PowerShellGet"] } } ProtectedEventLogging 此设置允许配置受保护的事件日志记录。 设置包含两个子项: EnableProtectedEventLogging- 如果启用此策略设置,则支持该策略的组件会在将日志数据写入日志数据之前使用你提供的证书来加密...
This parameter specifies what action should take place when an error occurs. The possible values for this parameter are defined by theActionPreferenceenumeration. ErrorVariable (alias: ev) Data type:String This parameter specifies the variable in which to place objects when an error occurs. To appe...
通过此例来分析script 和function的关系。 Script由普通的Function以及其他的逻辑语句(顺序、选择、循环)组成。 对pipeline input进行处理的script语句。其结构为 param(…) begin { … } process { … } end { … } PowerShell executes the begin statement when it loads your script, the process statement ...
Powershell已经提供了许多用户能够使用的预定义函数,这些函数可以通过Function:PSDrive虚拟驱动器查看。 PSC:\PowerShell>Get-ChildItemfunction: |Format-TableName,Definition Name Definition---A:Set-Location$MyInvocation.MyCommand.Name B:Set-Location$MyInvocation.MyCommand.Name C:Set-Location$MyInvocation.MyCom...
TheGet-Directoryfunction usesTest-Pathto determine if its parameter ($item) is a container object and a file system directory (that is, a System.IO.DirectoryInfo object). If theGet-Directoryfunction returned$null, the script writes an error to the error stream by using theWrite-Errorcmdlet ...