脚本 脚本范围适用于单个脚本。 脚本中的所有函数都可以查看在该脚本中设置的变量。 如果在脚本范围中设置已存在于全局范围中的变量值,则会在脚本范围中创建新的变量。 然后,两个不同的范围中便具有同名的两个变量。 此时,在查看脚本中变量的值时,将返回脚本范围中变量的值。 函数 函数范围适用于单个函数...
Get-Variable-Scopelocal 若要在特定作用域中创建变量,请使用范围修饰符或Scope参数Set-Variable。 以下命令在全局范围内创建变量: PowerShell复制 New-Variable-Scopeglobal-Namea-Value"One" 还可以使用New-Alias、Set-Alias或Get-Aliascmdlet 的 Scope 参数来指定范围。 以下命令在全局范围内创建别名: PowerShell复制...
Don't modify the global $ErrorActionPreference variable unless absolutely necessary. If you change it in a local scope, it reverts to the previous value when you exit that scope. If you're using something like .NET directly from within your PowerShell function, you can't specify the Error...
When a function is in the global scope, you can use the function in scripts, in functions, and at the command line. Functions create a new scope. The items created in a function, such as variables, exist only in the function scope. ...
For PowerShell to see a file extension as executable in the current session, you must add the extension to the $env:PATHEXT environment variable. See also - about_Aliases - about_Functions - about_Path_Syntax - Alias-Provider - Function-Provider - Get-Command - Import-Module - Import-...
that any functions, aliases, and variables that the script creates are added to the current scope, overriding existing ones. Parameters declared by the script become variables. Parameters for which no value has been given become variables with no value. However, the automatic variable$argsis ...
Note that it may be safer to query the rules with theGetcommand and save it in a variable, observe the rules to be affected, then pipe them to theRemovecommand, just as we did for theSetcommands. The following example shows how the administrator can view all the blocking firewall rules...
Get-Variable-Scopelocal 特定のスコープに変数を作成するには、スコープ修飾子またはSet-VariableのScopeパラメーターを使用します。 次のコマンドは、グローバル スコープに変数を作成します。 PowerShell New-Variable-Scopeglobal-Namea-Value"One" ...
If you run theUtilityFunctions.ps1script in its own script scope, theNew-Profilefunction and the$ProfileNamevariable exist only while the script is running. When the script exits, the function and variable are removed, as shown in the following example. ...
In the variable provider, if the variable that you are referencing is not defined in the current scope (e.g. if it is a global variable and you are in a child scope), renaming that variable via Rename-Item doesn't actually rename the variable in the scope it is in. The variable ...