除上述方法外,还可以在PowerShell中使用IsNullOrEmpty静态方法。 使用-eq运算符检查字符串是否为null或empty -eq运算符用于比较两个值是否相等。您可以将字符串与一个空字符串进行比较,以检查它是否为空。 代码: $str1=""if($str1-eq"") {Write-Host"String is empty"}else{Write-
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,但除非用户查看代码,否则不会看到它们。 以下示例中的函数在 foreach 循环内有一...
Select-String Cmdlet 會使用正則表示式比對來搜尋輸入字串和檔案中的文字模式。 您可以使用類似 Unix 中的 grep 或Windows 中的 findstr.exeSelect-String。 Select-String 是以文字行為基礎。 根據預設,Select-String 會尋找每一行中的第一個相符專案,而且,針對每個相符專案,它會顯示包含相符專案之行中的...
Check if file created today and not 0 KB Check if HyperThreading is enabled Check if IIS running on a remote server check if object is $null Check if OS is 32bit or 64bit check If Process Is Running in another computer Check if SMB1 is enabled on the AD servers Check if string cont...
Stringify ErrorRecord with empty exception message to empty string (#24949) (Thanks @MatejKafka!) Add completion single/double quote support for -PSEdition parameter for Get-Module (#24971) (Thanks @ArmaanMcleod!) Error when New-Item -Force is passed an invalid directory name (#24936) (Than...
[ValidateNotNullorEmpty()] [System.String]$ServerName, [System.String]$DomainName, [System.String]$CARootName, [System.String]$CAServerFQDN, [System.String]$CertSubject, [System.String]$SMBShare, [Parameter(Mandatory=$true)] [ValidateNotNullorEmpty()] [PsCredential]$Credential) Configuration ...
If you simply remove the[string]type then it will work as expected: function f2 { param ( $x ) return $x } $null -eq (f2 -x $null) There is no value in declaring a parameter as type string because all classes in .Net have to derive from theObjectclass. Therefore every class impl...
\test.csv | ForEach-Object { if($_ -match $temp){ #I add write-output to show the content of the file test.csv[n] Write-Output $_ } } Marked as Solution View Full Discussion (9 Replies)Show Parent Replies yuzoyox Iron ContributorSep 24, 2021 Please, do not forget to se...
And yes, VBScript echoes back a 0 if the value is False and a -1 if the value is True. If you’d rather see the words True or False, well, you’ll have to make even more modifications to the script. So then how do we do this same thing in Windows PowerShell? Like this: Copy...
Select-String C:\Scripts\test.txt -pattern "failed" Ah, but what if you want all the lines in the text file thatdon’tinclude the wordFailed? In Windows PowerShell 1.0, there’s no easy way to get that information. In Windows PowerShell 2.0, however, thereisa very easy way to get ...