private void ModifySelectionExecuted(object sender, ExecutedRoutedEventArgs e)
{
if (e.Parameter == null) return;
if (e.Parameter.ToString().ToLowerInvariant().Equals("selectall"))
{
ListViewExplorer.SelectedItems.Clear();
ListViewExplorer.Items.Cast<FileSystemInfo>()
.AsParallel()
.ForAll(info => { Dispatcher.InvokeAsync(()=> { ListViewExplorer.SelectedItems.Add(info); }); });
}
else
{
var fs = new FileSystemInfo[ListViewExplorer.SelectedItems.Count];
ListViewExplorer.SelectedItems.CopyTo(fs, 0);
if (fs.Length > 0)
{
ListViewExplorer.SelectedItems.Clear();
ListViewExplorer.Items.Cast<FileSystemInfo>()
.AsParallel()
.ForAll(info =>
{
if (!fs.Contains(info))
{
Dispatcher.InvokeAsync(() => { ListViewExplorer.SelectedItems.Add(info); });
}
});
}
}
}