> For the complete documentation index, see [llms.txt](https://docs.devolutions.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.devolutions.net/powershell-universal/it/app/components/inputs/select.md).

# Select

Crei elenchi a discesa select nelle app PowerShell Universal con opzioni raggruppate, selezione singola o multipla e gestione degli eventi di modifica.

I componenti select vengono utilizzati per raccogliere informazioni fornite dall'utente da un elenco di opzioni.

## Select semplice

Crei un select semplice con più opzioni.

```powershell
New-UDSelect -Option {
    New-UDSelectOption -Name 'One' -Value 1
    New-UDSelectOption -Name 'Two' -Value 2
    New-UDSelectOption -Name 'Three' -Value 3
}
```

## Select raggruppato

Crei un select con gruppi di selezioni.

```powershell
New-UDSelect -Option {
    New-UDSelectGroup -Name 'Group One' -Option {
        New-UDSelectOption -Name 'One' -Value 1
        New-UDSelectOption -Name 'Two' -Value 2
        New-UDSelectOption -Name 'Three' -Value 3
    }
    New-UDSelectGroup -Name 'Group Two' -Option {
        New-UDSelectOption -Name 'Four' -Value 4
        New-UDSelectOption -Name 'Five' -Value 5
        New-UDSelectOption -Name 'Size' -Value 6
    }
}
```

## OnChange

Esegua un gestore di eventi PowerShell quando il valore del select viene modificato. $EventData\[0] per il singolo elemento selezionato.

```powershell
New-UDSelect -Option {
    New-UDSelectOption -Name 'One' -Value 1
    New-UDSelectOption -Name 'Two' -Value 2
    New-UDSelectOption -Name 'Three' -Value 3
} -OnChange { Show-UDToast -Message $EventData[0] }
```

## Select multiplo

Esegua un gestore di eventi PowerShell quando più di un valore del select viene modificato. $EventData è un array degli elementi selezionati.

```powershell
New-UDSelect -Multiple -Option {
    New-UDSelectOption -Name 'One' -Value 1
    New-UDSelectOption -Name 'Two' -Value 2
    New-UDSelectOption -Name 'Three' -Value 3
} -OnChange { 
    Show-UDToast -Message (ConvertTo-json -InputObject $EventData) 
}
```

## Get-UDElement

Recuperi il valore del select da un altro componente.

```powershell
  New-UDSelect -Option {
      New-UDSelectOption -Name 'One' -Value 1
      New-UDSelectOption -Name 'Two' -Value 2
      New-UDSelectOption -Name 'Three' -Value 3
  } -Id 'select' -DefaultValue 2

  New-UDButton  -Text 'OnBoard' -OnClick {
    $Element = Get-UDElement -Id 'select'
    if ($Element.Value)
    {
      Show-UDToast -Message $Element.Value
    }
    else 
    {
      Show-UDToast -Message $Element.DefaultValue
    }
  }
```

## API

* [New-UDSelect](/powershell-universal/it/comandi-powershell/new-udselect.md)
* [New-UDSelectOption](/powershell-universal/it/comandi-powershell/new-udselectoption.md)
* [New-UDSelectGroup](/powershell-universal/it/comandi-powershell/new-udselectgroup.md)

***

###


---

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