public ListBoxPageViewModel()
{
Items = new ObservableCollection <string>(Enumerable.Range(1, 10000).Select(i => GenerateItem()));
Selection = new SelectionModel();
Selection.Select(1);
AddItemCommand = ReactiveCommand.Create(() => Items.Add(GenerateItem()));
RemoveItemCommand = ReactiveCommand.Create(() =>
{
while (Selection.SelectedItems.Count > 0)
{
Items.Remove((string)Selection.SelectedItems.First());
}
});
SelectRandomItemCommand = ReactiveCommand.Create(() =>
{
var random = new Random();
using (Selection.Update())
{
Selection.ClearSelection();
Selection.Select(random.Next(Items.Count - 1));
}
});
}