public void CheckSelectAllOrSelectPos(int pos)
{
if (FileListBox.Items.Count > pos)
{
if (SelectAllCheckBox.IsChecked ?? false)
{
FileListBox.SelectAll();
}
else
{
FileListBox.UnselectAll();
FileListBox.SelectedIndex = pos;
}
}
}
private void SelectAllButton_Click(object sender, RoutedEventArgs e)
{
if (FileListBox.Items.Count == 0)
{
return;
}
if (FileListBox.SelectedItems.Count == 0)
{
FileListBox.SelectAll();
}
else
{
FileListBox.UnselectAll();
}
}