\data\file.txt" # define the environment variable $Function:F = { param ($a, $b) "Hello there, $a, $b" } F 10 "red" # define and invoke a function function Demo { "Hi there from inside Demo" } $Alias:A = "Demo" # create alias for function Demo A # invoke function Demo...
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> $data.count 4 PowerShell 3.0 向大多数对象添加了计数属性。 你可以使用单个对象,它应该...
PowerShell 复制 param( [ValidateDrive("C", "D", "Variable", "Function")] [string]$Path ) ValidateUserDrive 验证属性ValidateUserDrive 属性指定参数值必须在 User 驱动器中表示。 如果路径引用其他驱动器,PowerShell 将生成错误。 验证属性仅测试路径的驱动器前缀是否存在。
Create(RunspaceMode) Constructs an empty PowerShell instance; a script or command must be added before invoking this instance. CreateNestedPowerShell() Creates a nested powershell within the current instance. Nested PowerShell is used to do simple operations like checking state of a varia...
If there are more objects than variables, all remaining objects are assigned to the last variable. If there are more variables than objects, the remaining variables are empty ($null).Example 4: Create a session with a specified portPowerShell Copy ...
These commands create a new credential object (for the CachedUser user) and store that object in the $credential variable. When reading the solution, you might at first be wary of storing a password on disk. While it is natural (and prudent) to be cautious of littering your hard drive wi...
That script block had him create a brand-new custom object. (I used special yellow ping-pong balls for this, and don't think those weren't tough to find at the local sporting goods store.) On these new ping-pong balls, he inscribed the current date and time along with the name of ...
# Create a cmdlet that accepts a [datetime] argument. Add-Type @' using System; using System.Management.Automation; [Cmdlet("Get", "Date_Cmdlet")] public class GetFooCmdlet : Cmdlet { [Parameter(Position=0)] public DateTime Date { get; set; } protected override void ProcessR...
Create populated text files with PowerShell. All three of these commands create a text file by saving the text assigned to the $txt variable to a desired path and filename: Set-Content -Path c:\test\test1.txt -Value $txt Add-Content -Path c:\test\test2.txt -Value $txt ...
your PowerShell profile script. This profile script is located at$Home\Documents\WindowsPowerShell\profile.ps1for Windows PowerShell and in$Home\Documents\PowerShell\profile.ps1for PowerShell Core. If the file doesn't exist, then create it. Then place the following function in the profile script...