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-Host"String is not empty"...
if語句不僅允許您在語句為$true時指定動作,也允許您在語句為$false時指定動作。 這就是else語句發揮作用的地方。 否則 使用時,else語句一律是if語句的最後一個部分。 PowerShell if(Test-Path-Path$Path-PathTypeLeaf ) {Move-Item-Path$Path-Destination$archivePath}else{Write-Warning"$pathdoesn't exist or...
下面是if语句的基本示例: PowerShell $condition=$trueif($condition) {Write-Output"The condition was true"} if语句执行的第一步是计算括号中的表达式。 如果计算结果为$true,则执行大括号中的scriptblock。 如果值为$false,则会跳过该脚本块。 在上面的示例中,if语句仅计算$condition变量。 其计算结果为$true...
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...
Set-PSDebug : Cannot bind parameter 'Trace'. Cannot convert value "2" to type "System.Int32". Error: "Input string was not in a correct format." At D:\Scripts\Scripts_7-6\test8-11.ps1:1 char:20 + set-psdebug -trace 2 ...
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...
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 ...
Set-ACL "C:\Scripts\Test.ps1" $objACL So is that really all there is to it? Well, let’s find out. Try running this command to retrieve the security descriptor and display it as a list: Copy Get-ACL "C:\Scripts\Test.ps1" | Format-List Now let’s see if the user fabrikam...
This time around, however, we’ve used a .NET Framework formatting string to specify that we want 0 decimal places ({0:N0}) in our answer: Copy Get-ChildItem C:\Test | Select-Object Name, @{Name="Kbytes";Expression={ "{0:N0}" -f ($_.Length / 1Kb) }} Good point: this ...
IsPublic IsSerial Name BaseType --- --- --- --- True True ArrayList System.Object PS C:\> $error.Count 0 In the next snippet I have executed a cmdlet that doesn’t exist, throwing an error. If we grab the count on $error, you will notice it has increased to one item. Dumping...