public ListBoxPageViewModel()
{
Items = new ObservableCollection <string>(Enumerable.Range(1, 10000).Select(i => GenerateItem()));
Selection = new SelectionModel <string>();
Selection.Select(1);
AddItemCommand = ReactiveCommand.Create(() => Items.Add(GenerateItem()));
RemoveItemCommand = ReactiveCommand.Create(() =>
{
while (Selection.Count > 0)
{
Items.Remove(Selection.SelectedItems.First());
}
});
SelectRandomItemCommand = ReactiveCommand.Create(() =>
{
var random = new Random();
using (Selection.BatchUpdate())
{
Selection.Clear();
Selection.Select(random.Next(Items.Count - 1));
}
});
}
public ListBoxPageViewModel()
{
Items = new ObservableCollection <string>(Enumerable.Range(1, 10000).Select(i => GenerateItem()));
Selection = new SelectionModel <string>();
Selection.Select(1);
_selectionMode = this.WhenAnyValue(
x => x.Multiple,
x => x.Toggle,
x => x.AlwaysSelected,
(m, t, a) =>
(m ? SelectionMode.Multiple : 0) |
(t ? SelectionMode.Toggle : 0) |
(a ? SelectionMode.AlwaysSelected : 0))
.ToProperty(this, x => x.SelectionMode);
AddItemCommand = ReactiveCommand.Create(() => Items.Add(GenerateItem()));
RemoveItemCommand = ReactiveCommand.Create(() =>
{
var items = Selection.SelectedItems.ToList();
foreach (var item in items)
{
Items.Remove(item);
}
});
SelectRandomItemCommand = ReactiveCommand.Create(() =>
{
var random = new Random();
using (Selection.BatchUpdate())
{
Selection.Clear();
Selection.Select(random.Next(Items.Count - 1));
}
});
}