Powershell Tip #41: DefaultParameterSetName of the CmdletBinding attribute

Tip: You can set the property DefaultParameterSetName of the CmdletBinding attribute.

ParameterSetName = allows you to specify the parameter set that a parameter belongs to.

In case there is no parameter set specified, the parameter belongs to all the parameters sets which are defined by the function.

function Get-Something
{
    [CmdletBinding(DefaultParameterSetName = 'Car')]

    Param
    (
        [Parameter(ParameterSetName = 'Car')]
        [switch]$Car,

        [Parameter(ParameterSetName = 'Bus')]
        [switch]$Bus,

        [Parameter(ParameterSetName = 'Bike')]
        [switch]$Bike
    )

    $PsCmdlet.ParameterSetName
}

function Get-Something

{

[CmdletBinding(DefaultParameterSetName = 'Car')]

Param

(

[Parameter(ParameterSetName = 'Car')]

[switch]$Car,

[Parameter(ParameterSetName = 'Bus')]

[switch]$Bus,

[Parameter(ParameterSetName = 'Bike')]

[switch]$Bike

)

$PsCmdlet.ParameterSetName

}

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