PS> $empty = $null PS> $empty[0] Error: Cannot index into a null array. 因此,在尝试访问数组中的元素之前,请确保数组不是 $null。Count数组和其他集合具有计数属性,可告知数组中有多少项。PowerShell 复制 PS> $data.count 4 PowerShell 3.0 向大多数对象添加了计数属性。 你可以使用单个对象,它应该...
If you want to allow more than one value for the ComputerName parameter, use the String datatype but add square brackets ([]) to the datatype to allow an array of strings. PowerShell Copy function Test-MrParameterValidation { [CmdletBinding()] param ( [Parameter(Mandatory)] [string[]]...
Calculating total size of objects in a directory, grouped by extension Call a batch file with parameters passed to it Call function with parameters invoke -command powershell call method from .Net class library using powershell Call Remote Invoke-Command and Not Wait? Call variable outside functio...
Function CloseSqlConnection{ Param( [Parameter(position = 0 , Mandatory = $true)]$SqlConn ) If ($sqlConn.State -eq 'Open'){ $SqlConn.Close() } } #示例 $SqlString = "select top 5 name from sys.databases " $SqlString2 = "select top 5 name from sys.objects " $SqlConn = GetSql...
A function is a list of PowerShell statements that has a name that you assign. When you run a function, you type the function name. PowerShell defines two kinds of functions: Afunctionis a block of code that can be called by name. It can take input and return output. Functions are ...
A PowerShell array is a component that enables the storage of more than one item in a variable or a field. For instance, to assign multiple values to a variable, use the script$a=1,2,3. PowerShell treats each item in an array as a separate element. To address each item in an arra...
在此示例中,仅 $array 中的第一项会传递给脚本块。 Output 复制 Hello PowerShell 复制 $array = 'Hello', 'World!' Invoke-Command -ScriptBlock { param([string[]]$words) $words -join ' ' } -ArgumentList (,$array) 在此示例中,$array 包装在数组中,以便整个数组作为单个对象传递到脚本块...
通过此例来分析script 和function的关系。 Script由普通的Function以及其他的逻辑语句(顺序、选择、循环)组成。 对pipeline input进行处理的script语句。其结构为 param(…) begin { … } process { … } end { … } PowerShell executes the begin statement when it loads your script, the process statement ...
Invoke-UseCreds is a function I created to simplify the process of using obtained credentials during a pen test. I use -Passwd instead of -Password because that parameter when defined should be configured as a secure string which is not the case when entering a value into that filed with th...
The purpose of ForEach is to take an array (or collection, which in Windows PowerShell is the same as an array) and enumerate the objects in the array so you can work with one at a time: T-SQL Copy $services = Get-Service ForEach ($service in $services) { $service.Stop() } ...