PowerShell 复制 <# .SYNOPSIS This is a test script that has a parameter with a default value. #> function TestDefaultValue { param( [PSDefaultValue(Help='Current directory')] [string]$Name = $PWD.Path ) $Name } 使用Get-Help 查看默认值信息。
当参数为“True (by Value) ”时,PowerShell 会尝试将任何通过管道传递的值与该参数相关联,然后再尝试使用其他方法解释命令。 True (by Property Name) Indicates that you can pipe a value to the parameter, but the .NET Framework type of the parameter must include a property with the same name as...
$PSDefaultParameterValues.Add("Get-Process:Name","PowerShell") 以下语法可实现相同的结果。 PowerShell $PSDefaultParameterValues["Get-Process:Name"]="PowerShell" $PSDefaultParameterValues变量显示更新后的哈希表。 添加了Get-Process:Name键。 PS> $PSDefaultParameterValues Name Value --- --- Get-Proc...
A parameter cannot be found that matches parameter name 'Searchbase' A parameter cannot be found that matches parameter name 'Type' a positional parameter cannot be found A positional parameter cannot be found that accepts argument ' '. A positional parameter cannot be found that accepts argument...
entry in this hash table defines a cmdlet, a parameter and a default value for that parameter. The hash table key is the name of the cmdlet, followed by a colon (:), and then the name of the parameter. The hash table value for this key is the new default value for the parameter....
$PSDefaultParameterValues["Out-File:Encoding"] = "UTF8" 接受通配符,这样我们可以批量设置值。 12.正则表达式的结果$Matches 当使用-match操作符的时候,自动变量$matches就会被创建,如果使用了子表达式捕获,哪些子匹配也会被列出来 $message = 'My SSN is 123-45-6789.' ...
Output 复制 Key Value --- --- a Power b Shell $PSCmdlet包含一个对象,该对象表示正在运行的 cmdlet 或高级函数。可以在 cmdlet 或函数代码中使用对象的属性和方法来响应使用条件。 例如,ParameterSetName 属性包含正在使用的参数集的名称,ShouldProcess 方法将 WhatIf 和Confirm 参数动态添加到 cmdlet。有关...
You can also use the Parameter parameter of theGet-Helpcmdlet to find information about a particular parameter. Or, you can use theParameterparameter with the wildcard character (*) value to find information about all parameters of the command. For example, the following command gets information...
That is it. When I run the function with no input parameters, it runs with a default value of 4. If I made the parameter mandatory, the function would ignore the default value and prompt. But when I have a default value assigned, it is always used unless it is overridden, so the ar...
Finding hidden commands The ALL parameter of the Get-Command cmdlet gets all commands with the specified name, even if they're hidden or replaced. Beginning in PowerShell 3.0, by default, Get-Command gets only the commands that run when you type the command name. In the following examples,...