In this little article, I describe how to use the cmdletTest-Pathto check whether a folder exists. Type "Get-Help Test-Path" for built-in information. I also briefly demonstrate how to use the .NET class method Exists() from the class System.IO.Directory. The Test-Path cmdlet returns a...
$valueName = "指定值名称" $exists = $false # 遍历注册表项 Get-ChildItem -Path $registryPath | ForEach-Object { $subKey = $_.PSChildName # 判断指定值是否存在 if (Test-Path -Path "$registryPath\$subKey") { $value = Get-ItemProperty -Path "$registryPath\$subKey" -Name $valueName...
如果表達式為 true,<condition>則會<if-true>執行表達式 如果表達式為 false,則會<if-false><condition>執行表達式 例如: PowerShell 複製 $message = (Test-Path $path) ? "Path exists" : "Path not found" 在此範例中,的 值為 $message Path exists 傳回$true時Test-Path。 傳回 $false時Test-Pat...
[int] NOT NULL);"$sqlText2="IF NOT EXISTS (SELECT * FROM sys.tables WHERE object_id = object_id('Step2Table')) CREATE TABLE [dbo].[Step2Table]([TestId] [int] NOT NULL);"$job|Add-AzSqlElasticJobStep-Name"step1"-TargetGroupName$serverGroup.TargetGroupName-CredentialName$jobCred....
如果<condition>表达式为 false,则执行<if-false>表达式 例如: PowerShell $message= (Test-Path$path) ?"Path exists":"Path not found" 在此示例中,如果路径存在,则显示“路径存在”。 如果路径不存在,则显示“找不到路径”。 有关关于假设情况的详细信息。
WhenSelect-Stringfinds more than one match in a line of text, it still emits only oneMatchInfoobject for the line, but theMatchesproperty of the object contains all the matches. Note This parameter is ignored when used in combination with theSimpleMatchparameter. If you wish to return all ma...
\Program Files\PowerShell\7\pwsh.exe Target : LinkType : Length : 293312 DirectoryName : C:\Program Files\PowerShell\7 Directory : C:\Program Files\PowerShell\7 IsReadOnly : False FullName : C:\Program Files\PowerShell\7\pwsh.exe Extension : .exe Name : pwsh.exe Exists : True ...
Why, by using Test-Path, of course:Copy Test-Path C:\Scripts\Archive Test-Path will return True if the folder exists and False if the folder doesn’t exist. See? Test-Path might be obscure, but it’s far from useless.But wait: there’s more. It’s nice that Test-Path works ...
PS>Set-Location-PathAlias: PS>Get-LocationPath --- Alias:\ PS>Get-ChildItem|Out-File-FilePathC:\TestDir\AliasNames.txt PS>Get-Content-PathC:\TestDir\AliasNames.txt CommandType Name --- --- Alias % ->ForEach-ObjectAlias ? ->Where-ObjectAlias ac ->Add-ContentAlias cat ->Get-Content...
要做到这点,在管道中使用Where-Object来处理Dir返回的结果,然后再使用ForEach-Object,或者你自定义的管道过滤。 你还可以将多个Dir 命令执行的结果结合起来。在下面的例子中,两个分开的Dir命令,产生两个分开的文件列表。然后PowerShell将它们结合起来发送给管道进行深度处理。这个例子获取Windows目录和安装程序目录下的所...