Multi Picker

Inherits from Xamarin.Forms.Label

The multi picker will allow the user to make multiple selections from a list of available items. If the field is not marked as required then the user can also leave it empty. When the field is tapped then a new model screen is shown with the list of items and a toggle for each one.

Properties

Property	Type	Description
Label	string	The label title to be used when wrapped in a control that displays a label for the field.
IsRequired	bool	If True then any validation performed will require that at least one value be selected.
Items	List	The items to be made available for user selection. (readonly)
SelectedItems	IEnumerable<PickerItem>	The items that have been selected by the user. (readonly)
SelectedValues	IList<string>	The item values that have been selected by the user.
SelectedValuesAsDelimited	string	The selected values as a comma delimited string. Useful with bindings to send the selected values back to the server. (readonly)

Example

<Rock:FieldContainer>
    <Rock:MultiPicker Label="Rock Multi Picker"
                      IsRequired="false"
                      SelectedValues="1,3,5">
        <Rock:PickerItem Value="1" Text="One" />
        <Rock:PickerItem Value="2" Text="Two" />
        <Rock:PickerItem Value="3" Text="Three" />
        <Rock:PickerItem Value="4" Text="Four" />
        <Rock:PickerItem Value="5" Text="Five" />
    </Rock:MultiPicker>
</Rock:FieldContainer>

As you can see in this example, the SelectedValues property can be used to set the initial selection with a comma delimited string. There is some magic happening in XAML that allows that to work. But you try to bind to that property or read it's value then you get an array of strings back. That is why the SelectedValuesAsDelimited property exists, it automatically converts that array into a comma delimited string for you.