PowerShell 中有一些運算子可讓您將命令包裝至下一行。 如果您想要將表達式分成多行,邏輯運算子-and和-or是很好的運算符。 PowerShell if($null-ne$user-and$user.Department-eq'Finance'-and$user.Title-match'Senior'-and$user.HomeDrive-notlike'\\server\*') {# Do Something} ...
在某些语言中,可以在if语句后放置一行代码,它将会得以执行。 在 PowerShell 中情况并非如此。 必须提供带大括号的完整scriptblock才能使其正常工作。 比较运算符 if语句最常见的用法是比较两个项。 PowerShell 具有特殊运算符,可用于不同的比较方案。 当使用比较运算符时,会将左右两侧的值进行比较。
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 contains invalid characters Check if string starts with letter/character. check instal...
# 获取所有进程 $processes = Get-Process # 使用 WHERE 子句筛选出 CPU 使用率大于 50 并且名称为 'chrome' 或 'firefox' 的进程 $filteredProcesses = $processes | Where-Object { $_.CPU -gt 50 -and ($_.'ProcessName' -eq 'chrome' -or $_.'ProcessName' -eq 'firefox') } # ...
For more information, seeworking with the PowerShell repository. Developing and Contributing Please look into theContribution Guideto know how to develop and contribute. If you are developing .NET Core C# applications targeting PowerShell Core,check out our FAQto learn more about the PowerShell SDK...
PowerShell 逻辑运算符只计算确定语句的事实值所需的语句。 如果包含 and 运算符的语句中的左操作数为 FALSE,则不会计算右操作数。 如果包含 or 语句的语句中的左操作数为 TRUE,则不会计算右操作数。 因此,可以采用与使用if语句相同的方式使用这些语句。
if($srv.Status -eq "Running"){"Spooler Service is running"} else{"Spooler Service is not running"} } Else{ Write-Output "There is no service with name Spooler" } Output: If / elseif /else functionality PowerShell In the above examples, we have seen that if and else conditions are ...
The following example shows the $input automatic variable with begin and end keywords. PowerShell Copy function Get-PipelineBeginEnd { begin { "Begin: The input is $input" } end { "End: The input is $input" } } If this function is run using the pipeline, it displays the following ...
If the two sides of the operators aren't reasonably comparable, these operators raise a non-terminating error. Matching operators The matching operators (-like, -notlike, -match, and -notmatch) find elements that match or don't match a specified pattern. The pattern for -like and -no...
The if() statement highlights what I said in my previous post which is that the value held in the string, $Stat, is not implicitly converted to its Boolean equivalent. Rather, PowerShell sees some random old string and performs an existence - or "not null" - check. ...