运行if语句时,PowerShell 会将<test1>条件表达式计算为 true 或 false。 如果<test1>为 true,<statement list 1>则运行,PowerShell 退出 语句if。 如果<test1>为 false,则 PowerShell 将计算条件语句指定的<test2>条件。 有关布尔计算的详细信息,请参阅about_Booleans。
find word in a text file and return boolean Find, Backup and Delete Registry Key on Remote Machine Find/Replace text in multiple files finding certificate template name thru powershell Finding HTML elements using XPath Finding The Calling Path/Script Name From Within A Powershell Module Function F...
Until PowerShell 7, wrapping a statement within parentheses(...), subexpression syntax$(...), or an array expression@(...)always reset$?toTrue. 例如,(Write-Error)會將$?顯示為 true。 此行為在 PowerShell 7 中已變更,因此$?一律反映這些表達式中最後一個命令執行的實際成功。
For example, you can use thethrowkeyword in the script block of anifstatement to respond to a condition or in thecatchblock of atry-catch-finallystatement. Thethrowkeyword can throw any object, such as a user message string or the object that caused the error. ...
null coalescing operator removes the need forifandelsestatements if you want to get the value of a statement if it’s not $null or return something else if it is $null. Note that this doesn’t replace the check for a boolean value of true or false, it’s only checking if the ...
AddCommand(String, Boolean) Add a cmdlet to construct a command pipeline. For example, to construct a command string "get-process | sort-object", Copy PowerShell shell = PowerShell.Create("get-process").AddCommand("sort-object"); AddCommand(String) Add a cmdlet to construct a comman...
If there are no matches in the collection, comparison operators return an empty array. For example: PowerShell Copy $a = (1, 2) -eq 3 $a.GetType().Name $a.Count Output Copy Object[] 0 There are a few exceptions: The containment and type operators always return a Boolean ...
To skip the parts of the debugger output that we don’t care about, we have a boolean flag initially set to true. If that flag is set, we check if the current line,$_, is the module header in which case we flip the flag.
Type:Boolean Position:Named Default value:None Required:False Accept pipeline input:False Accept wildcard characters:False -Password Specifies the password for the SQL Server Authentication login ID that was specified in the Username parameter. Passwords are case-sensitive. When possible, use Windows Au...
The search criteria for the Get-MailboxExportRequest cmdlet is a Boolean And statement. If you use multiple parameters, you narrow your search and reduce your search results. You need to be assigned permissions before you can run this cmdlet. Although this topic lists all parameters for the cmdle...