xamarin forms Update Item in CollectionView - xaml

Question

iam trying to create xmarin forms application witch use a collection view
that contain two item ( label = binding name & switch = binding switched )
but i have a problem with the switch its not update without Scrolling the collection
i use Model-View-ViewModel to bind my data and do operation
that`s my xaml :
<CollectionView x:Name="GroupsCV"
ItemsSource="{Binding Groups}"
SelectionMode="Multiple"
EmptyView="No Data"
SelectionChangedCommand="{Binding SelectedCommand}"
SelectionChangedCommandParameter="{Binding Source={x:Reference GroupsCV}}">
<CollectionView.ItemTemplate>
<DataTemplate>
<Grid Padding="15">
<Grid.RowDefinitions>
<RowDefinition Height="30"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="0.1*"/>
</Grid.ColumnDefinitions>
<Switch Style="{StaticResource SwitchStyle}" IsEnabled="False" IsToggled="{Binding Switched}" Grid.Column="0"/>
<Label Text="{Binding Name}" Grid.Column="1" Style="{StaticResource LabelStyle}"/>
</Grid>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
and this my code from View Model:
public GroupsViewModel()
{
datarepo.conn.CreateTable<Group>();
_groups = datarepo.conn.Table<Group>().ToList();
//GroupsCount = Groups.Count();
}
private IEnumerable<Group> _groups;
public IEnumerable<Group> Groups
{
get => _groups;
set
{
if (_groups != value)
{
_groups = value;
OnPropertyChanged(nameof(Groups));
}
}
}
public ICommand SelectedCommand
{
get
{
return new Command<CollectionView>((s) =>
{
var x = s.SelectedItems.Cast<Group>();
foreach (var e in x)
{
foreach (var z in Groups)
{
if (z.Link == x..Link)
{
if (z.Switched == false)
{
z.Switched = true;
}
else
{
z.Switched = false;
}
break;
}
}
}
OnPropertyChanged(nameof(Groups));
});
}
}
All Thing Work fine only the ui doesn`t update !
Update With Group Code
[Table("Group")]
public class Group
{
[PrimaryKey, AutoIncrement()]
public int? Id { get; set; }
[Unique]
public string Link { get; set; }
public string Name { get; set; }
public string MemberCount { get; set; } = null;
public bool Switched { get; set; }
}

Answer 1

Can you change your Group class like this?
[Table("Group")]
public class Group: INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
[PrimaryKey, AutoIncrement()]
public int? Id { get; set; }
[Unique]
public string Link { get; set; }
public string Name { get; set; }
public string MemberCount { get; set; } = null;
public bool Switched { get; set; }
}