ValidateSetAttribute:限制变量的取值集合 ValidateNotNullAttribute 例子 ValidateNotNullOrEmptyAttribute 例子,注意@()为一个空数组。
functionTest-MrParameterValidation{ [CmdletBinding()]param( [Parameter(Mandatory)] [string[]]$ComputerName)Write-Output$ComputerName} 如果没有指定ComputerName参数,也许要为其指定一个默认值。 问题是,默认值不能与强制性参数一起使用。 取而代之的是使用带有默认值的ValidateNotNullOrEmpty参数验证属性。
ValidateNotNullOrEmpty 属性指定分配的值不能为以下任何值:$null 空字符串 ("") 空数组 (@())如果值无效,PowerShell 会引发异常。PowerShell 复制 param( [Parameter(Mandatory)] [ValidateNotNullOrEmpty()] [string[]]$UserName ) ValidateNotNullOrWhiteSpace 验证属性ValidateNotNullOrWhiteS...
[ValidateNotNull] [ValidateNotNullOrEmpty] [ValidateNotNullOrWhiteSpace] [ValidatePattern] [ValidateRange] [ValidateScript] [ValidateSet] [ValidateTrustedData] [ValidateUserDrive] [version] [void] [WildcardPattern] [wmi] [wmiclass] [wmisearcher] ...
FunctionTest-ScriptCmdlet{ [CmdletBinding(SupportsShouldProcess=$true)]param($Parameter1)begin{}process{}end{} } begin This block is used to provide optional one-time preprocessing for the function. The PowerShell runtime uses the code in this block once for each instance of the function in th...
可以通过使用 DSC 配置脚本设置服务来简化请求服务器部署。 本文档包含可以用于部署生产准备就绪服务器节点的配置脚本。 若要使用配置脚本,需要一个未包含在 Windows Server 中的 DSC 模块。 所需模块名称是xPSDesiredStateConfiguration,其中包括 DSC 资源xDscWebService。 可以从PowerShell 库下载 xPSDesiredStateConfigu...
Also, whenSimpleMatchis used, theMatchesproperty of theMatchInfoobject returned is empty. Note When this parameter is used with theAllMatchesparameter, theAllMatchesis ignored. Type:SwitchParameter Position:Named Default value:False Required:False ...
After creating the empty array we use the Import-CSV cmdlet to read in the text file C:\Scripts\Test.txt and store the contents in a variable named $colStats. Incidentally, Import-CSV is a very underrated cmdlet. As long as your text file has a header line (which our text file does)...
This has significant implications for a function whose parameter has different meaning for$nullversus[string]::empty. In DSC resources, for example, it is natural to pass groups of parameters from the Set and Test functions down through a call stack which eventually makes a system call to manip...
Test-NetConnection We feel like a kid in a candy store. Or at least a kid in a candy store that also sells PowerShell cmdlets. PowerTab And then there was: PowerTab. As you probably know, out of the box Windows PowerShell includes some basictab expansion. (OK, “out of the box”...