# Radio

Radio buttons allow the user to select one option from a set.

Use radio buttons when the user needs to see all available options. If available options can be collapsed, consider using a dropdown menu because it uses less space.

Radio buttons should have the most commonly used option selected by default.

## Simple Radio

![](/files/spG3LgAILEUchX00DXAC)

```powershell
New-UDRadioGroup -Label "Day" -Content {
    New-UDRadio -Label Monday -Value 'monday'
    New-UDRadio -Label Tuesday -Value 'tuesday'
    New-UDRadio -Label Wednesday -Value 'wednesday'
    New-UDRadio -Label Thursday -Value 'thursday'
    New-UDRadio -Label Friday  -Value 'friday'
    New-UDRadio -Label Saturday -Value 'saturday'
    New-UDRadio -Label Sunday -Value 'sunday'
}
```

## OnChange

An event handler that is called when the radio group is changed. The `$EventData` variable will contain the current value. The `$Body` variable contains the full JSON for the event.

```powershell
New-UDRadioGroup -Label "Day" -Content {
    New-UDRadio -Label Monday -Value 'monday'
    New-UDRadio -Label Tuesday -Value 'tuesday'
    New-UDRadio -Label Wednesday -Value 'wednesday'
    New-UDRadio -Label Thursday -Value 'thursday'
    New-UDRadio -Label Friday  -Value 'friday'
    New-UDRadio -Label Saturday -Value 'saturday'
    New-UDRadio -Label Sunday -Value 'sunday'
} -OnChange {
    Show-UDToast -Message `$EventData`
}
```

## Default Value

Set the default value of the radio group.

```powershell
New-UDRadioGroup -Label "Day" -Content {
    New-UDRadio -Label Monday -Value 'monday'
    New-UDRadio -Label Tuesday -Value 'tuesday'
    New-UDRadio -Label Wednesday -Value 'wednesday'
    New-UDRadio -Label Thursday -Value 'thursday'
    New-UDRadio -Label Friday  -Value 'friday'
    New-UDRadio -Label Saturday -Value 'saturday'
    New-UDRadio -Label Sunday -Value 'sunday'
} -Value 'sunday'
```

## Custom Formatting

You can use custom formatting within the radio group. The below example will place the radio buttons next to each other instead of on top of each other.

```powershell
New-UDRadioGroup -Label "Day" -Content {
    New-UDRow -Columns {
        New-UDColumn -LargeSize 1 -Content {
            New-UDRadio -Label Monday -Value 'monday'        
        }
        New-UDColumn -LargeSize 1 -Content {
            New-UDRadio -Label Sunday -Value 'sunday'
        }
    }
}
```

## API

* [New-UDRadio](https://github.com/ironmansoftware/universal-docs/blob/v5/cmdlets/New-UDRadio.txt)
* [New-UDRadioGroup](https://github.com/ironmansoftware/universal-docs/blob/v5/cmdlets/New-UDRadioGroup.txt)


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