function Test-MrParameterValidation { [CmdletBinding()] param ( [ValidateNotNullOrEmpty()] [string[]]$ComputerName = $env:COMPUTERNAME ) Write-Output $ComputerName } 详细输出 如果要编写复杂的代码,则内联注释非常有用,但除非用户查看代
如需變更的完整清單,請參閱 GitHub 存放庫中的CHANGELOG。 如需 .NET 9 的詳細資訊,請參閱 [.NET 9 的新功能][07]。 重大變更 修正Test-Path在使用PathType和日期範圍時的-OlderThan和-NewerThan參數(#20942)(感謝 @ArmaanMcleod!)) 先前,如果-OlderThan一起指定,這個元素會被忽略。
Powershell 默认支持的.NET类型如下。 [array],[bool],[byte],[char],[datetime],[decimal],[double],[guid],[hashtable],[int16],[int32],[int],[int64],[long],[nullable],[psobject],[regex],[sbyte].[scriptblock],[single],[float],[string],[switch],[timespan],[type],[uint16],[uint3...
可以将 AllowEmptyString 属性用于此方案。 AllowEmptyString 验证属性 AllowEmptyString 属性允许强制参数的值为空字符串("")。 以下示例声明一个 ComputerName 参数,该参数可以具有空字符串值。 PowerShell 复制 param( [Parameter(Mandatory)] [AllowEmptyString()] [string]$ComputerName ) AllowEmptyColl...
Within a pipeline, theprocessblock executes once for each input object that reaches the function. If the pipeline input that reaches the function is empty, theprocessblock doesn't execute. Thebegin,end, andcleanblocks still execute. Important ...
Select-String Select-Xml Send-MailMessage Set-Alias Set-Date Set-MarkdownOption Set-PSBreakpoint Set-TraceSource Set-Variable Show-Command Show-Markdown Sort-Object Start-Sleep Tee-Object Test-Json Trace-Command Unblock-File Unregister-Event ...
Stringify ErrorRecord with empty exception message to empty string (#24949) (Thanks @MatejKafka!) Add completion single/double quote support for -PSEdition parameter for Get-Module (#24971) (Thanks @ArmaanMcleod!) Error when New-Item -Force is passed an invalid directory name (#24936) (Than...
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-Path Env:\username Cool, huh? Test-Path also works with variables, certificates, aliases, and functions. For example: Copy Test-Path Alias:\gci And it works with the registry as well, albeit only with registry keys and not with the actual values contained in those keys: Copy ...
Select-String C:\Scripts\Test.lxt -pattern "failure" -context 2 What’s the2passed to –context for? That simply tells the script that, when it comes time to display any matches, we don’t want to see just the line of text where the match occurred. Instead, we also want to see th...