If-Else/Do-While/Switch/For/While都和普通编程语言无异 ForEach Foreach($<item> in $<collection>) { Statement-1 Statement-2 Statement-N } 函数 常规函数 function[<scope:>]<name>[([type]$parameter1[,[type]$parameter2])]{param([type]$parameter1[,[type]$parameter2])dynamicparam{<stateme...
Cannot find an overload for ".ctor" and the argument count: "2" Cannot find an overload for "op_Subtraction" and the argument count: "2". Cannot find drive. A drive with the name '"C' does not exist. Cannot find drive. A drive with the name 'E' does not exist. Cannot find p...
("DisplayName") # for each value which is not blank if ($null -ne $value -and $value -ne ""){ # The below if statement looks through the values discovered above in the uninstall Registry location and only for the programs defined in the variables above $DisplayVersion = $Read...
In the previous example, theifstatement was just evaluating the$conditionvariable. It was$trueand would have executed theWrite-Outputcommand inside the scriptblock. In some languages, you can place a single line of code after theifstatement and it gets executed. That isn't the case in Power...
command-module: primary-expression command-name: generic-token generic-token-with-subexpr generic-token-with-subexpr: No whitespace is allowed between ) and command-name. generic-token-with-subexpr-start statement-list~opt~ ) command-name command-name-expr: command-name primary-expression command-...
Introduction to Else If in PowerShell If / else conditions are the most useful conditions in a scripting language and you may want to use multiple times while writing script. If the first condition in If the statement fails then the second stage is ElseIf statement. InElseIfblock you can ...
All fine and good. However, if I only want to check and run code for invalid integers (doing nothing for valid ones), the following IF statement returns nothing regardless of the $value’s value: PS>$value = "abc" PS>if(isInt($value) -eq $false){ write-output "Invalid" } ...
The $ signs in the SELECT statement that identify the SQLCMD variables are escaped using the back-tick (`) character. Example 4: Invoke a script and pass in variables from the SQL database engine PowerShell Copy Set-Location "SQLSERVER:\SQL\MyComputer\MainInstance" PS SQLSERVER:\SQL\MyC...
To create this script, open a text editor or a script editor, type these commands, and then save them in a file namedServiceLog.ps1. Parameters in scripts To define parameters in a script, use aparamstatement. Theparamstatement must be the first statement in a script, except for comments...
Here's an example of removing the last domain controller in the domain with its minimal required arguments of -lastdomaincontrollerindomain and -removeapplicationpartitions: If you attempt to remove the AD DS role before demoting the server, Windows PowerShell blocks you with an error: Important ...